10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2019

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-11430

--

MINERALS TECHNOLOGIES INC.

(Exact name of registrant as specified in its charter)

DELAWARE	25-1190717
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

622 Third Avenue, New York, NY 10017-6707

(Address of principal executive offices, including zip code)

(212) 878-1800

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of exchange on which registered
Common Stock, $0.10 par value	MTX	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

YES ☒ NO ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

YES ☒ NO ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or and emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer ☒	Accelerated Filer ☐
Non-accelerated Filer ☐(Do not check if a smaller reporting company)	Smaller Reporting Company ☐
Emerging Growth Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES ☐ NO ☒

As of April 22, 2019, there were 35,235,161 shares of common stock, par value of $0.10 per share, of the registrant outstanding.

MINERALS TECHNOLOGIES INC.

INDEX TO FORM 10-Q

		Page No.
PART I.   FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Condensed Consolidated Statements of Income for the three-month periods ended March 31, 2019 and April 1, 2018 (Unaudited)	3
	Condensed Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2019 and April 1, 2018 (Unaudited)	4
	Condensed Consolidated Balance Sheets as of March 31, 2019 (Unaudited) and December 31, 2018	5
	Condensed Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2019 and April 1, 2018 (Unaudited)	6
	Condensed Consolidated Statements of Shareholders' Equity for the three-month periods ended March 31, 2019 and April 1, 2018 (Unaudited)	7
	Notes to Condensed Consolidated Financial Statements (Unaudited)	8
	Report of Independent Registered Public Accounting Firm	22
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	23
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	30
Item 4.	Controls and Procedures	30
PART II.   OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 3.	Default Upon Senior Securities	33
Item 4.	Mine Safety Disclosures	33
Item 5.	Other Information	33
Item 6.	Exhibits	33
Signature		34

PART 1. FINANCIAL INFORMATION

ITEM 1.  Financial Statements

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended
(in millions of dollars, except per share data)	Mar. 31, 2019			Apr. 1, 2018
Product sales	$	417.4		$	412.2
Service revenue		20.3			19.1
Total net sales		437.7			431.3
Cost of goods sold		314.0			305.0
Cost of service revenue		14.0			12.8
Total cost of sales		328.0			317.8
Production margin		109.7			113.5
Marketing and administrative expenses		42.9			44.4
Research and development expenses		4.8			6.1
Acquisition related transaction and integration costs		—			0.4
Income from operations		62.0			62.6
Interest expense, net		(11.4	)		(10.7	)
Other non-operating deductions, net		(1.4	)		(2.7	)
Total non-operating deductions, net		(12.8	)		(13.4	)
Income from operations before tax and equity in earnings		49.2			49.2
Provision for taxes on income		9.3			9.3
Equity in earnings of affiliates, net of tax		0.1			1.2
Consolidated net income		40.0			41.1
Less:
Net income attributable to non-controlling interests		0.9			1.2
Net income attributable to Minerals Technologies Inc.	$	39.1		$	39.9
Earnings per share:
Basic:
Income from operations attributable to Minerals Technologies Inc.	$	1.11		$	1.13
Diluted:
Income from operations attributable to Minerals Technologies Inc.	$	1.11		$	1.12
Cash dividends declared per common share	$	0.05		$	0.05
Shares used in computation of earnings per share:
Basic		35.2			35.4
Diluted		35.3			35.7

See accompanying Notes to Condensed Consolidated Financial Statements.

3

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Consolidated net income	$	40.0		$	41.1
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(0.4	)		15.2
Pension and postretirement plan adjustments		1.6			1.9
Unrealized gains on derivative instruments		1.2			1.6
Total other comprehensive income, net of tax		2.4			18.7
Total comprehensive income including non-controlling interests		42.4			59.8
Comprehensive income attributable to non-controlling interests		(1.4	)		(1.8	)
Comprehensive income attributable to Minerals Technologies Inc.	$	41.0		$	58.0

See accompanying Notes to Condensed Consolidated Financial Statements.

4

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(millions of dollars)	Mar. 31, 2019*			Dec. 31, 2018 **
ASSETS
Current assets:
Cash and cash equivalents	$	202.7		$	208.8
Short-term investments		4.3			3.8
Accounts receivable, net		406.4			387.3
Inventories		254.4			239.2
Prepaid expenses and other current assets		36.1			37.2
Total current assets		903.9			876.3
Property, plant and equipment		2,269.0			2,256.0
Less accumulated depreciation and depletion		(1,167.9	)		(1,153.1	)
Property, plant and equipment, net		1,101.1			1,102.9
Goodwill		812.4			812.4
Intangible assets		211.8			214.1
Deferred income taxes		24.8			26.3
Other assets and deferred charges		109.4			55.1
Total assets	$	3,163.4		$	3,087.1
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
Short-term debt	$	104.7		$	105.2
Current maturities of long-term debt		2.7			3.3
Accounts payable		178.2			169.1
Other current liabilities		105.2			104.3
Total current liabilities		390.8			381.9
Long-term debt, net of unamortized discount and deferred financing costs		893.4			907.8
Deferred income taxes		198.1			196.8
Accrued pension and post-retirement benefits		124.0			124.2
Other non-current liabilities		129.7			91.1
Total liabilities		1,736.0			1,701.8
Shareholders' equity:
Common stock		4.9			4.9
Additional paid-in capital		432.6			431.9
Retained earnings		1,817.4			1,769.1
Accumulated other comprehensive loss		(242.7	)		(233.7	)
Less common stock held in treasury		(618.7	)		(618.7	)
Total Minerals Technologies Inc. shareholders' equity		1,393.5			1,353.5
Non-controlling interests		33.9			31.8
Total shareholders' equity		1,427.4			1,385.3
Total liabilities and shareholders' equity	$	3,163.4		$	3,087.1

* Unaudited

** Condensed from audited financial statements

See accompanying Notes to Condensed Consolidated Financial Statements.

5

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Operating Activities:
Consolidated net income	$	40.0		$	41.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization		24.5			21.1
Amortization of right of use asset		3.4			—
Other non-cash items		2.1			(1.1	)
Net changes in operating assets and liabilities		(39.2	)		(25.4	)
Net cash provided by operating activities		30.8			35.7
Investing Activities:
Purchases of property, plant and equipment, net		(17.6	)		(17.9	)
Proceeds from sale of short-term investments		0.9			0.7
Purchases of short-term investments		(1.5	)		(2.0	)
Net cash used in investing activities		(18.2	)		(19.2	)
Financing Activities:
Repayment of long-term debt		(15.8	)		(0.4	)
Repayment of short-term debt		(0.6	)		—
Purchase of common stock for treasury		—			(5.7	)
Proceeds from issuance of stock under option plan		0.1			0.6
Excess tax benefits related to stock incentive programs		(1.9	)		(3.2	)
Dividends paid to non-controlling interests		(0.1	)		(0.1	)
Capital contribution from non-controlling interests		0.8			—
Cash dividends paid		(1.7	)		(1.8	)
Net cash used in financing activities		(19.2	)		(10.6	)
Effect of exchange rate changes on cash and cash equivalents		0.5			5.1
Net (decrease) increase in cash and cash equivalents		(6.1	)		11.0
Cash and cash equivalents at beginning of period		208.8			212.2
Cash and cash equivalents at end of period	$	202.7		$	223.2
Supplemental disclosure of cash flow information:
Interest paid	$	10.9		$	10.5
Income taxes paid	$	5.8		$	4.0
Non-cash financing activities:
Treasury stock purchases settled after period end	$	—		$	0.3

See accompanying Notes to Condensed Consolidated Financial Statements.

6

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(Unaudited)

	Equity Attributable to Minerals Technologies Inc.
(millions of dollars)	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Non-controlling Interests			Total
Balance as of December 31, 2018	$	4.9	$	431.9	$	1,769.1		$	(233.7	)	$	(618.7	)	$	31.8		$	1,385.3
Net income		—		—		39.1			—			—			0.9			40.0
Other comprehensive income		—		—		—			1.9			—			0.5			2.4
Dividends declared		—		—		(1.7	)		—			—			—			(1.7	)
Dividends paid to non-controlling interests		—		—		—			—			—			(0.1	)		(0.1	)
Cumulative effect of accounting change		—		—		10.9			(10.9	)		—			—			—
Capital contribution from non-controlling interests		—		—		—			—			—			0.8			0.8
Issuance of shares pursuant to employee stock compensation plans		—		0.1		—			—			—			—			0.1
Stock-based compensation		—		0.6		—			—			—			—			0.6
Balance as of March 31, 2019	$	4.9	$	432.6	$	1,817.4		$	(242.7	)	$	(618.7	)	$	33.9		$	1,427.4

	Equity Attributable to Minerals Technologies Inc.
(millions of dollars)	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Non-controlling Interests			Total
Balance as of December 31, 2017	$	4.9	$	422.7	$	1,607.2		$	(186.1	)	$	(597.0	)	$	27.4		$	1,279.1
Net income		—		—		39.9			—			—			1.2			41.1
Other comprehensive income		—		—		—			18.2			—			0.5			18.7
Dividends declared		—		—		(1.8	)		—			—			—			(1.8	)
Dividends paid to non-controlling interests		—		—		—			—			—			(0.2	)		(0.2	)
Issuance of shares pursuant to employee stock compensation plans		—		0.5		—			—			—			—			0.5
Purchase of common stock for treasury		—		—		—			—			(5.7	)		—			(5.7	)
Balance as of April 1, 2018	$	4.9	$	423.2	$	1,645.3		$	(167.9	)	$	(602.7	)	$	29.0		$	1,331.8

See Notes to Consolidated Financial Statements, which are an integral part of these statements.

7

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1.  Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements have been prepared by management of Minerals Technologies Inc. (the “Company”, “MTI”, “we”, or “us”) in accordance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted. Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2018. In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included. The results for the three-month periods ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019.

Company Operations

The Company is a resource- and technology-based company that develops, produces and markets worldwide a broad range of specialty mineral, mineral-based and synthetic mineral products and supporting systems and services.

The Company has four reportable segments: Performance Materials, Specialty Minerals, Refractories and Energy Services.

– The Performance Materials segment is a leading global supplier of bentonite and bentonite-related products, chromite and leonardite. This segment also provides products for non-residential construction, environmental and infrastructure projects worldwide, serving customers engaged in a broad range of construction projects.

– The Specialty Minerals segment produces and sells the synthetic mineral product precipitated calcium carbonate ("PCC") and processed mineral product quicklime ("lime"), and mines mineral ores then processes and sells natural mineral products, primarily limestone and talc.

– The Refractories segment produces and markets monolithic and shaped refractory materials and specialty products, services and application and measurement equipment, and calcium metal and metallurgical wire products.

– The Energy Services segment provides services to improve the production, costs, compliance, and environmental impact of activities performed in the oil and gas industry. This segment offers a range of patented and unpatented technologies, products and services to the upstream and downstream oil and gas sector throughout the world.

Use of Estimates

The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, valuation of long-lived assets, goodwill and other intangible assets, income taxes, including valuation allowances, and pension plan assumptions. Actual results could differ from those estimates.

Recently Issued Accounting Standards

Changes to accounting principles generally accepted in the United States of America (U.S. GAAP) are established by the Financial Accounting Standards Board (FASB) in the form of accounting standards updates (ASUs) to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. All recently issued ASUs were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and results of operations.

Recently Adopted Accounting Standards

On January 1, 2019, the Company adopted the provisions of ASU 2016-02, “Leases”, which requires lessees to recognize most leases on-balance sheet. The Company has adopted this new standard under the modified retrospective transition method, using the effective date as our date of initial application. As such, financial information and required disclosures will not be provided for dates prior to January 1, 2019.  The new standard provides a number of optional practical expedients in transition. We have elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We have elected the short-term lease recognition exemption for all leases that qualify. On adoption, we recognized additional operating liabilities of $61.4 million with corresponding right-of-use assets of $50.5 million based on the present value of the remaining lease payments under existing operating leases.  As of December 31, 2018, we had $10.9 million in deferred charges related to some of our real estate leases that were recorded against the right of use asset as part of the transition.  The adoption of this standard did not have a material impact on the Company's financial statements.

8

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

On January 1, 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheets as of March 31, 2019.

Note 2.  Leases

We determine if an arrangement is a lease at inception.  The Company has operating leases for premises, equipment, rail cars and automobiles.   Our leases have remaining lease terms of 1 year to 50 years, some of which may include options to extend the leases further. The Company considers these options in determining the lease term used to establish the right-of-use assets and lease liabilities.  As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based upon the information available at commencement date, or as of implementation of ASC 842, in determining the present value of lease payments.

Leases with an initial term of 12 months or less are not recorded on the balance sheet. We recognize lease expense for these leases on a straight-line basis over the lease term. Certain lease agreements contain both lease and non-lease components. We account for lease components together with non-lease components.

Operating lease cost for the quarter ended March 31, 2019 was $4.1 million.  Components of lease cost of are as follows:

(millions of dollars)	Mar. 31, 2019
Operating lease cost	$	4.0
Short-term lease cost	$	0.1

Supplemental cash flow information and non-cash activity related to our operating leases are as follows:

(millions of dollars)	Mar. 31, 2019
Operating cash flows information:
Cash paid for amounts included in the measurement of lease liabilities	$	4.0
Non-cash activity:
Right-of-use assets obtained in the exchange for operating lease liabilities	$	0.2

Weighted average remaining lease term, and weighted average discount rates related to the Company’s operating leases were as follows:

Weighted-average remaining operating lease term (in years)	7.87
Weighted-average operating leases discount rate	5.0%

The following table summarizes the Company's outstanding lease assets and liabilities and their classification on the Condensed Consolidated Balance Sheet:

(millions of dollars)	Balance Sheet Classification	Mar. 31, 2019
Right-of-use asset	Other assets and deferred charges	$	47.4
Lease liability - current	Other current liabilities		12.3
Lease liability - non-current	Other non-current liabilities		46.1

9

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Future minimum lease payments under the Company's operating leases as of March 31, 2019 were as follows:

(millions of dollars)	Mar. 31, 2019
For the remainder of 2019	$	11.5
2020		12.3
2021		9.0
2022		7.2
2023		5.9
Thereafter		25.3
Total future minimum lease payments		71.2
Less imputed interest		(13.0	)
Total	$	58.2

As of December 31, 2018, minimum lease payments under non-cancellable operating leases were expected to be as follows:

(millions of dollars)	Dec. 31, 2018
2019	$	17.3
2020		13.0
2021		9.5
2022		8.2
2023		7.0
Thereafter		24.8
Total	$	79.8

A summary of rent expense for the fiscal years ended December 31, 2018 and December 31, 2017 was as follows:

(millions of dollars)	Dec. 31, 2018		Dec. 31, 2017
Rent expense	$	19.5	$	19.3

The Company has certain arrangements under which we are the lessor.  Lease income associated with these leases is not material.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 3.  Revenue from Contracts with Customers

The following table disaggregates our revenue by major source (product line) for the three-month periods ended March 31, 2019 and April 1, 2018:

(millions of dollars)	Three Months Ended
Net Sales	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Performance Materials		199.2		187.3
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Specialty Minerals		144.4		149.6
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

Note 4.  Business Combination

On April 30, 2018, the Company completed the acquisition of Sivomatic Holding B.V. (“Sivomatic”), a leading European supplier of premium pet litter products. Sivomatic is a vertically integrated manufacturer, with production facilities in the Netherlands, Austria and Turkey. With a leading position in premier clumping products, Sivomatic’s product portfolio spans the range of pet litter derived from bentonite, sourced predominantly from wholly-owned mines in Turkey. The results of Sivomatic are included in our Performance Materials segment. The acquisition was financed through a combination of cash on hand and borrowings under the Company’s credit facilities. The fair value of the total consideration transferred, net of cash acquired, was $122.5 million.

The acquisition has been accounted for using the acquisition method of accounting, which requires, among other things, that we recognize the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. As of March 31, 2019, the purchase price allocation remains preliminary as the Company completes its assessment of property, mineral rights, certain reserves including environmental, legal and tax matters, obligations, intangible assets, taxes payable, impact of foreign exchange and deferred taxes, as well as complete our review of Sivomatic’s existing accounting policies.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The following table summarizes the Company’s preliminary purchase price allocation for the Sivomatic acquisition as of March 31, 2019, as compared with the allocation previously reported on the Company's Form 10-K for the year ended December 31, 2018:

(millions of dollars)	Preliminary Allocation Previously Reported on Form 10-K as of December 31, 2018		Increase/ (Decrease)		Allocation as of March 31, 2019
Accounts receivable	$	24.4	$	—	$	24.4
Inventories		15.6		—		15.6
Other current assets		0.6		—		0.6
Mineral rights		39.7		—		39.7
Property, plant and equipment		28.3		—		28.3
Goodwill		35.0		—		35.0
Intangible assets		26.4		—		26.4
Total assets acquired		170.0		—		170.0
Current maturity of long-term debt		5.7		—		5.7
Accounts payable		9.0		—		9.0
Accrued expenses		5.6		—		5.6
Long-term debt		5.3		—		5.3
Non-current deferred tax liability		19.7		—		19.7
Other non-current liabilities		2.2		—		2.2
Total liabilities assumed		47.5		—		47.5
Net assets acquired	$	122.5	$	—	$	122.5

The Company used the income, market, or cost approach (or a combination thereof) for the preliminary valuation, and used valuation inputs and analyses that were based on market participant assumptions. Market participants are considered to be buyers and sellers unrelated to the Company in the principal or most advantageous market for the asset or liability. For certain items, the carrying value was determined to be a reasonable approximation of fair value based on the information available.

Goodwill was calculated as the excess of the consideration transferred over the assets acquired and represents the estimated future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. The allocation will be completed during the second quarter of 2019. Goodwill recognized as a result of this acquisition is not deductible for tax purposes.

In connection with the acquisition, the Company recorded an additional deferred tax liability of $18.8 million with a corresponding increase to goodwill. The increase in the deferred tax liability represents the tax effect of the difference between the estimated assigned fair value of the tangible and intangible assets and the tax basis of such assets.

Mineral rights were valued using discounted cash flow method. Property, plant and equipment were valued using the cost method adjusted for age and deterioration.

Intangible assets acquired mainly include tradenames and customer relationships. Both tradenames and customer relationships have an estimated useful life of approximately 20 years.

The Company did not present pro forma and other financial information for the Sivomatic acquisition, as this is not considered to be a material business combination.

Note 5.  Earnings per Share (EPS)

Basic earnings per share are based upon the weighted average number of common shares outstanding during the period. Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all potentially dilutive common shares outstanding.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The following table sets forth the computation of basic and diluted earnings per share:

	Three Months Ended
(in millions, except per share data)	Mar. 31, 2019		Apr. 1, 2018
Net income attributable to Minerals Technologies Inc.	$	39.1	$	39.9
Weighted average shares outstanding		35.2		35.4
Dilutive effect of stock options and stock units		0.1		0.3
Weighted average shares outstanding, adjusted		35.3		35.7
Basic earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.13
Diluted earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.12

Options to purchase 748,754 shares and 362,443 shares of common stock for the three-month periods ended March 31, 2019 and April 1, 2018, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.

Note 6.  Restructuring and Other Items, net

At March 31, 2019, the Company had $2.3 million included within accrued liabilities in the Condensed Consolidated Balance Sheet for cash expenditures needed to satisfy remaining obligations under workforce reduction initiatives. The Company expects to pay these amounts by the end of 2019.

The following table is a reconciliation of our restructuring liability balance as of March 31, 2019:

(millions of dollars)
Restructuring liability, December 31, 2018	$	2.5
Cash payments		(0.2	)
Restructuring liability,  March 31, 2019	$	2.3

Note 7.  Income Taxes

Provision for taxes was $9.3 million during the three-month periods ended March 31, 2019 and April 1, 2018. The effective tax rate was 18.9% for the three-month periods ended March 31, 2019 and April 1, 2018.

As of March 31, 2019, the Company had approximately $17.0 million of total unrecognized income tax benefits. Included in this amount were a total of $13.3 million of unrecognized income tax benefits that, if recognized, would affect the Company’s effective tax rate. While it is expected that the amount of unrecognized tax benefits will change in the next 12 months, the Company does not expect the change to have a significant impact on the results of operations or the financial position of the Company.

The Company’s accounting policy is to recognize interest and penalties accrued relating to unrecognized income tax benefits as part of its provision for income taxes. The Company had a net increase of approximately $0.3 million during the three-months ended March 31, 2019 and had an accrued balance of $2.9 million and $1.8 million of interest and penalties as of March 31, 2019 and April 1, 2018, respectively.

The Company operates in multiple taxing jurisdictions, both within and outside the U.S. In certain situations, a taxing authority may challenge positions that the Company has adopted in its income tax filings. The Company, with a few exceptions (none of which are material), is no longer subject to income tax examinations by tax authorities for years prior to 2010.

13

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 8.  Inventories

The following is a summary of inventories by major category:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Raw materials	$	102.8	$	93.4
Work-in-process		10.2		11.2
Finished goods		97.5		92.2
Packaging and supplies		43.9		42.4
Total inventories	$	254.4	$	239.2

Note 9.  Goodwill and Other Intangible Assets

Goodwill and other intangible assets with indefinite lives are not amortized, but instead are assessed for impairment, at least annually. The carrying amount of goodwill was $812.4 million as of March 31, 2019 and December 31, 2018.

Intangible assets subject to amortization as of March 31, 2019 and December 31, 2018 were as follows:

			Mar. 31, 2019				Dec. 31, 2018
(millions of dollars)	Weighted Average Useful Life (Years)		Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Tradenames		35	$	204.2	$	28.1	$	204.2	$	26.6
Technology		13		18.8		6.8		18.8		6.4
Patents		19		6.4		5.7		6.4		5.6
Customer relationships		22		26.5		3.5		26.5		3.2
		32	$	255.9	$	44.1	$	255.9	$	41.8

The weighted average amortization period for acquired intangible assets subject to amortization is approximately 32 years. Estimated amortization expense is $7.0 million for the remainder of 2019, $36.7 million for 2020–2023 and $168.1 million thereafter.

Note 10.  Derivative Financial Instruments

As a multinational corporation with operations throughout the world, the Company is exposed to certain market risks. The Company uses a variety of practices to manage these market risks, including, when considered appropriate, derivative financial instruments. The Company's objective is to offset gains and losses resulting from interest rates and foreign currency exposures with gains and losses on the derivative contracts used to hedge them. The Company uses derivative financial instruments only for risk management and not for trading or speculative purposes.

By using derivative financial instruments to hedge exposures to changes in interest rates and foreign currencies, the Company exposes itself to credit risk and market risk. Credit risk is the risk that the counterparty will fail to perform under the terms of the derivative contract. When the fair value of a derivative contract is positive, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative contract is negative, the Company owes the counterparty, and therefore, it does not face any credit risk. The Company minimizes the credit risk in derivative instruments by entering into transactions with major financial institutions.

Market risk is the adverse effect on the value of a financial instrument that results from a change in interest rates, currency exchange rates, or commodity prices. The market risk associated with interest rate and forward exchange contracts is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

14

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Cash Flow Hedges

For derivative instruments that are designated and qualify as cash flow hedges, the Company records the effective portion of the gain or loss in accumulated other comprehensive income (loss) as a separate component of shareholders' equity. The Company subsequently reclassifies the effective portion of gain or loss into earnings in the period during which the hedged transaction is recognized in earnings.

The Company utilizes interest rate swaps to limit exposure to market fluctuations on floating-rate debt. In the second quarter of 2018, the Company entered into a floating to fixed interest rate swap for a notional amount of $150 million. The fair value of this swap is a liability of $4.1 million at March 31, 2019 and is recorded in other non-current liabilities on the Condensed Consolidated Balance Sheet. In addition, in the second quarter of 2016, the Company entered into a floating to fixed interest rate swap with an initial aggregate notional amount of $300 million. The notional amount was $129 million at March 31, 2019. The fair value of this swap is an asset of $1.9 million at March 31, 2019 and is recorded in other assets and deferred charges on the Condensed Consolidated Balance Sheet. These interest rate swaps are designated as cash flow hedges. As a result, the gains and losses associated with these interest rate swaps are recorded in accumulated other comprehensive income (loss).

Net Investment Hedges

For derivative instruments that are designated and qualify as net investment hedges, the Company records the effective portion of the gain or loss in accumulated other comprehensive income (loss) as a separate component of shareholders' equity.

To protect the value of our investments in our foreign operations against adverse changes in foreign currency exchange rates, the Company from time to time hedges a portion of our net investment in one or more of our foreign subsidiaries. During the second quarter of 2018, the Company entered into a cross currency rate swap with a total notional value of $150 million to exchange monthly fixed-rate interest payments in U.S. dollars for monthly fixed-rate interest rate payments in Euros. This contract matures in May 2023 and requires the exchange of Euros and U.S. dollar principal payments upon maturity. The fair value of this swap is an asset of $7.9 million at March 31, 2019 and is recorded in other assets and deferred charges on the Condensed Consolidated Balance Sheet. Changes in the fair value of this financial instrument are recognized in accumulated other comprehensive income (loss) to offset the change in the carrying amount of the net investment being hedged. Amounts are reclassified out of accumulated other comprehensive income (loss) into earnings when the hedged net investment is either sold or substantially liquidated.

Assets and liabilities measured at fair value are based on one or more of three valuation techniques. The three valuation techniques are as follows:

● Market approach - prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

● Cost approach - amount that would be required to replace the service capacity of an asset or replacement cost.

● Income approach - techniques to convert future amounts to a single present amount based on market expectations, including present value techniques, option-pricing and other models.

The Company primarily applies the income approach for interest rate derivatives for recurring fair value measurements and attempts to utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.

The fair value of our interest rate swaps and cross currency rate swap contracts are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets and are categorized as Level 2.

15

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 11.  Long-Term Debt and Commitments

The following is a summary of long-term debt:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Term Loan Facility-Variable Tranche due February 14, 2024, net of unamortized discount and deferred financing costs of $18.6 million and $19.4 million	$	639.4	$	638.6
Term Loan Facility- Fixed Tranche due May 9, 2021, net of unamortized discount and deferred financing costs of $0.3 million and $0.3 million		247.8		262.6
Netherlands Term Loan due 2020		2.8		3.4
Netherlands Term Loan due 2022		1.2		1.4
Japan Loan Facilities		4.9		5.1
Total		896.1		911.1
Less: Current maturities		2.7		3.3
Total long-term debt	$	893.4	$	907.8

On May 9, 2014, in connection with the acquisition of AMCOL International Corporation (“AMCOL”), the Company entered into a credit agreement providing for a $1.560 billion senior secured term loan facility (the “Term Facility”) and a $200 million senior secured revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Facilities”).

On June 23, 2015, the Company entered into an amendment (the “First Amendment”) to the credit agreement to reprice the $1.378 billion then outstanding on the Term Facility. As amended, the Term Facility had a $1.078 billion floating rate tranche and a $300 million fixed rate tranche. On February 14, 2017, the Company entered into an amendment (the “Second Amendment”) to the credit agreement to reprice the $788 million floating rate tranche then outstanding, which extended the maturity and lowered the interest costs by 75 basis points. On April 18, 2018, the Company entered into an amendment (the “Third Amendment”) to the credit agreement to refinance the Revolving Facility. As amended, the Revolving Facility has been increased to $300 million in aggregate commitments. Following the amendments, the loans outstanding under the floating rate tranche of the Term Facility will mature on February 14, 2024, the loans outstanding under the fixed rate tranche of the Term Facility will mature on May 9, 2021 and the loans outstanding (if any) and commitments under the Revolving Facility will mature and terminate, as the case may be, on April 18, 2023. Loans under the floating rate tranche of the Term Facility bear interest at a rate equal to an adjusted LIBOR rate (subject to a floor of 0.75%) plus an applicable margin equal to 2.25% per annum. Loans under the fixed rate tranche of the Term Facility bear interest at a rate of 4.75%. Loans under the Revolving Facility bear interest at a rate equal to an adjusted LIBOR rate plus an applicable margin equal to 1.625% per annum. Such rates are subject to decrease by up to 25 basis points in the event that, and for so long as, the Company’s net leverage ratio (as defined in the credit agreement) is less than certain thresholds. The floating rate tranche of the Term Facility was issued at par and the fixed rate tranche of the Term Facility was issued at a 0.25% discount in connection with the First Amendment. The variable rate tranche of the Term Facility was issued at a 0.25% discount in connection with the Second Amendment. The variable rate tranche has a 1% required amortization per year. The Company will pay certain fees under the credit agreement, including customary annual administration fees. The obligations of the Company under the Facilities are unconditionally guaranteed jointly and severally by, subject to certain exceptions, all material domestic subsidiaries of the Company (the “Guarantors”) and secured, subject to certain exceptions, by a security interest in substantially all of the assets of the Company and the Guarantors.

During the first quarter of 2019, the Company repaid $15 million on its Term Facility.

The credit agreement contains certain customary affirmative and negative covenants that limit or restrict the ability of the Company and its restricted subsidiaries to enter into certain transactions or take certain actions. In addition, the credit agreement contains a financial covenant that requires the Company, if on the last day of any fiscal quarter loans or letters of credit were outstanding under the Revolving Facility (excluding up to $15 million of letters of credit), to maintain a maximum net leverage ratio (as defined in the credit agreement) of, initially, 5.25 to 1.00 for the four fiscal quarters preceding such day. Such maximum net leverage ratio requirement is subject to decrease during the duration of the facility to a minimum level (when applicable) of 3.50 to 1.00.  In connection with the Sivomatic acquisition, the Company incurred $113 million of short-term debt under the Revolving Facility. As of March 31, 2019, there were $100 million in outstanding loans and $10.2 million in letters of credit outstanding under the Revolving Facility. The Company is in compliance with all the covenants associated with the Revolving Facility as of the end of the period covered by this report.

16

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

As part of the Sivomatic acquisition, the Company assumed $10.7 million in long-term debt, recorded at fair value, consisting of two term loans, one of which matures in 2020 and the other of which matures in 2022. These loans carry an interest rate of Euribor plus 2.0% and have quarterly repayments. During the first quarter of 2019, the Company repaid $0.7 million on these loans.

The Company has a committed loan facility in Japan. As of March 31, 2019, $4.9 million was outstanding under this loan facility. Principal will be repaid in accordance with the payment schedule ending in 2021. The Company repaid $0.2 million on this facility during the first quarter of 2019.

As of March 31, 2019, the Company had $43.2 million in uncommitted short-term bank credit lines, of which approximately $4.7 million was in use.

Note 12.  Benefit Plans

The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees. Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation.

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	1.8		$	2.0
Interest cost		3.5			3.0
Expected return on plan assets		(4.6	)		(4.8	)
Amortization:
Prior service cost		0.1			0.2
Recognized net actuarial loss		2.3			2.7
Net periodic benefit cost	$	3.1		$	3.1

	Other Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	—		$	0.1
Interest cost		0.1			0.1
Amortization:
Prior service cost		—			(0.3	)
Recognized net actuarial (gain)		(0.2	)		(0.2	)
Net periodic benefit cost	$	(0.1	)	$	(0.3	)

Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income.

The Company expects to contribute approximately $9.7 million to its pension plans and $0.3 million to its other postretirement benefit plans in 2019. As of March 31, 2019, approximately $1.4 million has been contributed to the pension plans and no contributions to the other postretirement benefit plans.

17

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 13.  Comprehensive Income

The following table summarizes the amounts reclassified out of accumulated other comprehensive loss attributable to the Company:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Amortization of pension items:
Pre-tax amount	$	2.2		$	2.4
Tax		(0.6	)		(0.5	)
Net of tax	$	1.6		$	1.9

The pre-tax amounts in the table above are included within the components of net periodic pension benefit cost (see Note 12 to the Condensed Consolidated Financial Statements) and the tax amounts are included within the provision for taxes on income line within the Condensed Consolidated Statements of Income.

The major components of accumulated other comprehensive loss, net of related tax, attributable to MTI are as follows:

(millions of dollars)	Foreign Currency Translation Adjustment			Unrecognized Pension Costs			Net Gain (Loss) on Derivative Instruments			Total
Balance as of December 31, 2018	$	(170.1	)	$	(69.7	)	$	6.1		$	(233.7	)
Other comprehensive loss before reclassifications		(1.0	)		—			1.3			0.3
Amounts reclassified from AOCI		—			1.6			—			1.6
Net current period other comprehensive income (loss)		(1.0	)		1.6			1.3			1.9
Cumulative effect of accounting change		—			(10.4	)		(0.5	)		(10.9	)
Balance as of March 31, 2019	$	(171.1	)	$	(78.5	)	$	6.9		$	(242.7	)

In January 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheet as of March 31, 2019.

Note 14.  Accounting for Asset Retirement Obligations

The Company records asset retirement obligations for situations in which the Company will be required to incur costs to retire tangible long-lived assets. The fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made.

The Company also records liabilities related to land reclamation as a part of asset retirement obligations. The Company mines various minerals using a surface mining process that requires the removal of overburden. In certain areas and under various governmental regulations, the Company is obligated to restore the land comprising each mining site to its original condition at the completion of the mining activity. The obligation is adjusted to reflect the passage of time, mining activities, and changes in estimated future cash outflows.

The following is a reconciliation of asset retirement obligations as of March 31, 2019:

(millions of dollars)
Asset retirement liability, December 31, 2018	$	23.4
Accretion expense		0.9
Payments		(0.7	)
Asset retirement liability, March 31, 2019	$	23.6

18

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The asset retirement costs are capitalized as part of the carrying amount of the associated asset. The current portion of the liability of approximately $0.4 million is included in other current liabilities and the long-term portion of the liability of approximately $23.2 million is included in other non-current liabilities in the Condensed Consolidated Balance Sheet as of March 31, 2019.

Note 15.  Contingencies

The Company is party to a number of lawsuits arising in the normal course of our business.

Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials. The Company currently has three pending silica cases and forty pending asbestos cases. To date, 1,493 silica cases and 57 asbestos cases have been dismissed, not including any lawsuits against AMCOL or American Colloid Company dismissed prior to our acquisition of AMCOL. Seven new asbestos cases were filed during the first quarter of 2019, and three additional asbestos cases were filed subsequent to the end of the quarter. No asbestos or silica cases were dismissed during the period. Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any. Additional claims of this nature may be made against the Company or its subsidiaries. At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

 The Company has settled only one silica lawsuit, for a nominal amount, and no asbestos lawsuits to date (not including any that may have been settled by AMCOL prior to completion of the acquisition). We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage. The aggregate cost to the Company for the legal defense of these cases since inception continues to be insignificant. The majority of the costs of defense for these cases, excluding cases against AMCOL or American Colloid, are reimbursed by Pfizer Inc. pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. The Company is entitled to indemnification, pursuant to agreement, for sales prior to the initial public offering. Of the 40 pending asbestos cases, 29 of the non-AMCOL cases are subject to indemnification, in whole or in part, because the plaintiffs claim liability based on sales of products that occurred either entirely before the initial public offering, or both before and after the initial public offering. In five of the seven remaining non-AMCOL cases, the plaintiffs have not alleged dates of exposure, and in the remaining two non-AMCOL cases, exposure is alleged to have been after the Company's initial public offering in 1992. The remaining four cases involve AMCOL only, so no Pfizer indemnity is available. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination and assessing site-specific risks. We are awaiting regulators’ approval of the risk assessment report, which will form the basis for a proposal by the Company concerning eventual remediation.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Pursuant to a Consent Decree entered on October 24, 2014, the United States paid the Company $2.3 million in the 4th quarter of 2014 to resolve the Company’s claim for response costs for investigation and initial remediation activities at this facility through October 24, 2014. Contribution by the United States to any future costs of investigation or additional remediation has, by agreement, been left unresolved. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company’s share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2019.

The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection (“DEP”) on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010. The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater. Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2019.

19

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

Note 16.  Segment and Related Information

On a regular basis, the Company reviews its segments and the approach used by the chief operating decision maker to assess performance and allocate resources. The Company has four reportable segments: Performance Materials, Specialty Minerals, Refractories and Energy Services. See Note 1 to the Condensed Consolidated Financial Statements. Segment information for the three-month periods ended March 31, 2019 and April 1, 2018  is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Net Sales
Performance Materials	$	199.2	$	187.3
Specialty Minerals		144.4		149.6
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3
Income from Operations
Performance Materials	$	26.3	$	26.2
Specialty Minerals		22.0		24.1
Refractories		12.1		12.8
Energy Services		2.4		1.5
Total	$	62.8	$	64.6

A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Income from operations for reportable segments	$	62.8		$	64.6
Acquisition related transaction and integration costs		—			(0.4	)
Unallocated corporate expenses		(0.8	)		(1.6	)
Consolidated income from operations		62.0			62.6
Non-operating deductions, net		(12.8	)		(13.4	)
Income from operations before tax and equity in earnings	$	49.2		$	49.2

20

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The Company's sales by product category are as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

21

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

Minerals Technologies Inc.:

Results of Review of Interim Financial Information

We have reviewed the condensed consolidated balance sheet of Minerals Technologies Inc. and subsidiaries (the Company) as of March 31, 2019, the related condensed consolidated statements of income and comprehensive income for the three-month periods ended March 31, 2019 and April 1, 2018, the related condensed consolidated statements of shareholders' equity and cash flows for the three-month periods ended March 31, 2019 and April 1, 2018, and the related notes (collectively, the consolidated interim financial information). Based on our reviews, we are not aware of any material modifications that should be made to the consolidated interim financial information for it to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheet of the Company as of December 31, 2018, and the related consolidated statements of income and comprehensive income, shareholders’ equity, and cash flows for the year then ended (not presented herein); and in our report dated February 15, 2019, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2018, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

Basis for Review Results

This consolidated interim financial information is the responsibility of the Company’s management. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our reviews in accordance with the standards of the PCAOB. A review of consolidated interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the PCAOB, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

/s/ KPMG LLP

New York, New York

May 3, 2019

22

ITEM 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations

Executive Summary

In the first quarter of 2019, the Company continued to advance the execution of its growth strategies of geographic expansion and new product innovation and development with a focus on operational excellence and productivity improvements. Consolidated sales for the first quarter of 2019 were $437.7 million, as compared with $431.3 million in the prior year. Income from operations was $62.0 million and represented 14.2% of sales, as compared with $62.6 million and 14.5% of sales in the prior year. Net income was $39.1 million, as compared to $39.9 million in the first quarter of 2018.

Diluted earnings in the first quarter ended March 31, 2019 were $1.11 per share compared with $1.12 per share in 2018.

Our balance sheet continues to be strong. Cash, cash equivalents and short-term investments were $207.0 million as of March 31, 2019. We repaid $16 million of our debt in the first quarter of 2019. Our intention continues to be to maintain a balanced approach to capital deployment, by using excess cash flow for investments in growth, debt reduction and selective share repurchases.

Outlook

Looking forward, we remain cautious about the state of the global economy and the impact it will have on our product lines.

The Company will continue to focus on innovation and new product development and other opportunities for sales growth in 2019 from its existing businesses, as follows:

● Increase our presence and gain penetration of our bentonite-based foundry customers for the Metalcasting industry in emerging markets, such as China and India.

● Increase our presence and market share in global pet care products, particularly in emerging markets.

● Deploy new products in pet care such as lightweight litter.

● Increase our presence and market share in Asia and in the global powdered detergent market.

● Continue the development of our proprietary Enersol® products for agricultural applications worldwide.

● Pursue opportunities for our products in environmental and building and construction markets in the Middle East, Asia Pacific and South America regions.

● Increase our presence and market share for geosynthetic clay liners within the Environmental Products product line.

● Develop multiple high-filler technologies under the FulFill® platform of products, to increase the fill rate in freesheet paper and continue to progress with commercial discussions and full-scale paper machine trials.

● Develop products and processes for waste management and recycling opportunities to reduce the environmental impact of the paper mill, reduce energy consumption and improve the sustainability of the papermaking process, including our NewYield^® and ENVIROFIL^® products.

● Further penetration into the packaging segment of the paper industry.

● Increase our sales of PCC for paper by further penetration of the markets for paper filling at both freesheet and groundwood mills, particularly in emerging markets.

● Expand the Company's PCC coating product line using the satellite model.

● Promote the Company's expertise in crystal engineering, especially in helping papermakers customize PCC morphologies for specific paper applications.

● Expand PCC produced for paper filling applications by working with industry partners to develop new methods to increase the ratio of PCC for fiber substitutions.

● Develop unique calcium carbonate and talc products used in the manufacture of novel biopolymers, a new market opportunity.

● Deploy new talc and GCC products in paint, coating and packaging applications.

● Deploy value-added formulations of refractory materials that not only reduce costs but improve performance.

● Deploy our laser measurement technologies into new applications.

● Expand our refractory maintenance model to other steel makers globally.

● Increase our presence and market penetration in offshore produced water and offshore filtration and well testing within the Energy Services segment.

● Deploy operational excellence principles into all aspects of the organization, including system infrastructure and lean principles.

● Continue to explore selective acquisitions to fit our core competencies in minerals and fine particle technology.

However, there can be no assurance that we will achieve success in implementing any one or more of these opportunities.

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Results of Operations

Three months ended March 31, 2019 as compared with three months ended April 1, 2018

Consolidated Income Statement Review

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018			% Growth
Net sales	$	437.7		$	431.3			1	%
Cost of sales		328.0			317.8			3	%
Production margin		109.7			113.5			(3	)%
Production margin %		25.1	%		26.3	%
Marketing and administrative expenses		42.9			44.4			(3	)%
Research and development expenses		4.8			6.1			(21	)%
Acquisition related transaction and integration costs		—			0.4			(100	)%
Income from operations		62.0			62.6			(1	)%
Operating margin %		14.2	%		14.5	%
Interest expense, net		(11.4	)		(10.7	)		7	%
Other non-operating deductions, net		(1.4	)		(2.7	)		(48	)%
Total non-operating deductions, net		(12.8	)		(13.4	)		(4	)%
Income from operations before tax and equity in earnings		49.2			49.2			—
Provision for taxes on income		9.3			9.3			—
Effective tax rate		18.9	%		18.9	%
Equity in earnings of affiliates, net of tax		0.1			1.2			(92	)%
Net income		40.0			41.1			(3	)%
Net income attributable to non-controlling interests		0.9			1.2			(25	)%
Net income attributable to Minerals Technologies Inc. (MTI)	$	39.1		$	39.9			(2	)%

Net Sales

	Three Months Ended Mar. 31, 2019								Three Months Ended Apr. 1, 2018
(millions of dollars)	Net Sales		% of Total Sales			% Growth			Net Sales		% of Total Sales
U.S.	$	231.7		52.9	%		—		$	232.3		53.9	%
International		206.0		47.1	%		4	%		199.0		46.1	%
Total sales	$	437.7		100.0	%		1	%	$	431.3		100.0	%
Performance Materials Segment	$	199.2		45.5	%		6	%	$	187.3		43.4	%
Specialty Minerals Segment		144.4		33.0	%		(3	)%		149.6		34.7	%
Refractories Segment		73.8		16.9	%		(2	)%		75.3		17.5	%
Energy Services Segment		20.3		4.6	%		6	%		19.1		4.4	%
Total sales	$	437.7		100.0	%		1	%	$	431.3		100.0	%

Worldwide net sales increased 1% to $437.7 million in the first quarter from $431.3 million in the prior year. Foreign exchange had an unfavorable impact on sales of approximately $11.4 million or 3%.  The Company's first quarter results include $25.2 million of sales from Sivomatic, which we acquired in the second quarter of 2018.

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Net sales in the United States decreased to $231.7 million from $232.3 million in the prior year. International sales increased 4% to $206.0 million from $199.0 million in the prior year.

Operating Costs and Expenses

Cost of sales was $328.0 million and 74.9% of sales as compared with $317.8 million and 73.7% of sales in the prior year. This increase was due primarily to higher raw material, logistics and energy costs in all segments.

Marketing and administrative costs were $42.9 million and 9.8% of sales compared to $44.4 million and 10.3% of sales in the prior year.

Research and development expenses were $4.8 million, as compared with $6.1 million in the prior year, and represented 1.1% of sales compared with 1.4% of sales.

The Company incurred charges of $0.4 million for acquisition related transaction and integration costs during the three months ended April 1, 2018.

Income from Operations

The Company recorded income from operations of $62.0 million as compared to $62.6 million in the prior year.  Operating income during the three months ended April 1, 2018 includes acquisition-related integration costs of $0.4 million.

Other Non-Operating Income (Deductions)

In the first quarter of 2019, non-operating deductions were $12.8 million as compared with $13.4 million in the prior year. This decrease was primarily attributable to foreign exchange gain in the current year as compared with foreign exchange losses in the prior year.

Provision for Taxes on Income

Provision for taxes on income was $9.3 million for the three months ended March 31, 2019 and April 1, 2018.  The effective tax rate was 18.9% for both periods.

Consolidated Net Income

Consolidated net income was $39.1 million for the three months ended March 31, 2019 as compared with $39.9 million in the prior year.

Segment Review

The following discussions highlight the operating results for each of our four segments.

	Three Months Ended
Performance Materials Segment	Mar. 31, 2019			Apr. 1, 2018			% Growth
	(millions of dollars)
Net Sales
Metalcasting	$	73.2		$	79.2			(8	)%
Household, Personal Care & Specialty Products		74.9			48.7			54	%
Environmental Products		15.9			12.7			25	%
Building Materials		15.3			18.9			(19	)%
Basic Minerals		19.9			27.8			(28	)%
Total net sales	$	199.2		$	187.3			6	%
Income from operations	$	$ 26.3		$	$ 26.2
% of net sales		13.2	%		14.0	%

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Net sales in the Performance Materials segment increased 6% to $199.2 million from $187.3 million in the prior year.  Sales in Household, Personal Care & Specialty Products increased 54%, due to the acquisition of Sivomatic in the second quarter of 2018, and the continued growth of our pet care products in North America.  Environmental Products sales increased 25% driven by an ongoing large international project. Sales growth in the segment was partially offset by decreased sales in Metalcasting, Building Materials and Basic Minerals. The decrease in Metalcasting sales was primarily due to weaker demand in China early in the first quarter. Sales of Building Materials decreased 19% primarily due to weather-related construction project delays.  The decrease in Basic Minerals sales was due to lower drilling activity in the Permian Basin and to the Company's exit from the bulk chromite business in the first quarter of 2018.

Income from operations was $26.3 million and 13.2% of sales as compared to $26.2 million and 14.0% of sales in the prior year. Pricing actions more than offset higher raw materials and logistics costs. However, operating income and margins were affected by an unfavorable product mix due to the weather-related project delays.

	Three Months Ended
Specialty Minerals Segment	Mar. 31, 2019			Apr. 1, 2018			% Growth
	(millions of dollars)
Net Sales
Paper PCC	$	91.5		$	97.0			(6	)%
Specialty PCC		18.1			17.0			6	%
PCC Products	$	109.6		$	114.0			(4	)%
Ground Calcium Carbonate	$	22.3		$	22.5			(1	)%
Talc		12.5			13.1			(5	)%
Processed Minerals Products	$	34.8		$	35.6			(2	)%
Total net sales	$	144.4		$	149.6			(3	)%
Income from operations	$	22.0		$	24.1			(9	)%
% of net sales		15.2	%		16.1	%

Worldwide sales in the Specialty Minerals segment were $144.4 million as compared with $149.6 million in the prior year, a decrease of 3%.

Worldwide net sales of PCC, which is primarily used in the manufacturing process of the paper industry, decreased 4% to $109.6 million from $114.0 million in the prior year.  Paper PCC sales decreased 6% to $91.5 million from $97.0 million, primarily due to the unfavorable impact of foreign exchange and reduced sales in North America driven by previously announced customer paper machine shutdowns, including the closure of a U.S. paper mill in the first quarter of 2019.  Sales of Specialty PCC increased 6% to $18.1 million from $17.0 million in the prior year driven by an expansion at our U.K. facility, higher volumes for the automotive, sealant and consumer markets as well as pricing actions.

Net sales of Processed Minerals products decreased 2% to $34.8 million, primarily due to severe weather on the U.S. west coast resulting in construction project delays and logistics challenges. Ground Calcium Carbonate sales decreased 1% to $22.3 million from $22.5 million in the prior year. Talc sales decreased 5% to $12.5 million as compared with $13.1 million in the prior year.

Income from operations for Specialty Minerals was $22.0 million as compared with $24.1 million in the prior year. The decrease was primarily due to previously announced paper machine shutdowns in North America, the unfavorable impact of foreign exchange and higher energy costs, partially offset by higher pricing.

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	Three Months Ended
Refractories Segment	Mar. 31, 2019			Apr. 1, 2018			% Growth
	(millions of dollars)
Net Sales
Refractory Products	$	62.0		$	62.3			—
Metallurgical Products		11.8			13.0			(9	)%
Total net sales	$	73.8		$	75.3			(2	)%
Income from operations	$	12.1		$	12.8			(5	)%
% of net sales		16.4	%		17.0	%

Net sales in the Refractories segment decreased 2% to $73.8 million from $75.3 million in the prior year driven by lower Refractory sales in Turkey and Germany, as well as lower sales of Metallurgical Products.  Sales of refractory products and systems to steel and other industrial applications decreased slightly to $62.0 million. Sales of metallurgical products decreased 9% to $11.8 million.

Income from operations decreased 5% to $12.1 million and was 16.4% of sales.

	Three Months Ended
Energy Services Segment	Mar. 31, 2019			Apr. 1, 2018			% Growth
	(millions of dollars)
Net Sales	$	20.3		$	19.1			6	%
Income from operations	$	2.4		$	1.5			60	%
% of net sales		11.8	%		7.9	%

Net sales in the Energy Services segment increased 6% to $20.3 million from $19.1 million in the prior year, primarily driven by higher well testing activity.

Operating income was $2.4 million as compared with $1.5 million in the prior year.

Liquidity and Capital Resources

Cash provided from operations during the three months ended March 31, 2019, was approximately $31 million. Cash flows provided from operations during the first quarter of 2019 were principally used to repay debt, fund capital expenditures and to pay the Company's dividend to common shareholders. The aggregate maturities of long-term debt are as follows: remainder of 2019 - $2.4 million; 2020 - $2.1 million; 2021 - $252.2 million; 2022 - $0.2 million; 2023 - $0.0 million; thereafter - $658.0 million.

On May 9, 2014, in connection with the acquisition of AMCOL International Corporation (“AMCOL”), the Company entered into a credit agreement providing for the $1.560 billion senior secured term loan facility (the “Term Facility”) and a $200 million senior secured revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Facilities”).

On June 23, 2015, the Company entered into an amendment (the “First Amendment”) to the credit agreement to reprice the $1.378 billion then outstanding on the Term Facility. As amended, the Term Facility had a $1.078 billion floating rate tranche and a $300 million fixed rate tranche. On February 14, 2017, the Company entered into an amendment (the “Second Amendment”) to the credit agreement to reprice the $788 million floating rate tranche then outstanding, which extended the maturity and lowered the interest costs by 75 basis points. On April 18, 2018, the Company entered into an amendment (the “Third Amendment”) to the credit agreement to refinance the Revolving Facility. As amended, the Revolving Facility has been increased to $300 million in aggregate commitments. Following the amendments, the loans outstanding under the floating rate tranche of the Term Facility will mature on February 14, 2024, the loans outstanding under the fixed rate tranche of the Term Facility will mature on May 9, 2021 and the loans outstanding (if any) and commitments under the Revolving Facility will mature and terminate, as the case may be, on April 18, 2023. Loans under the floating rate tranche of the Term Facility bear interest at a rate equal to an adjusted LIBOR rate (subject to a floor of 0.75%) plus an applicable margin equal to 2.25% per annum. Loans under the fixed rate tranche of the Term Facility bear interest at a rate of 4.75%. Loans under the Revolving Facility bear interest at a rate equal to an adjusted LIBOR rate plus an applicable margin equal to 1.625% per annum. Such rates are subject to decrease by up to 25 basis points in the event that, and for so long as, the Company’s net leverage ratio (as defined in the credit agreement) is less than certain thresholds. The floating rate tranche of the Term Facility was issued at par and the fixed rate tranche of the Term Facility was issued at a 0.25% discount in connection with the First Amendment. The variable rate tranche of the Term Facility was issued at a 0.25% discount in connection with the Second Amendment. The variable rate tranche has a 1% required amortization per year. The Company will pay certain fees under the credit agreement, including customary annual administration fees. The obligations of the Company under the Facilities are unconditionally guaranteed jointly and severally by, subject to certain exceptions, all material domestic subsidiaries of the Company (the “Guarantors”) and secured, subject to certain exceptions, by a security interest in substantially all of the assets of the Company and the Guarantors.

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During the first quarter of 2019, the Company repaid $15 million on its Term Facility.

The credit agreement contains certain customary affirmative and negative covenants that limit or restrict the ability of the Company and its restricted subsidiaries to enter into certain transactions or take certain actions. In addition, the credit agreement contains a financial covenant that requires the Company, if on the last day of any fiscal quarter loans or letters of credit were outstanding under the Revolving Facility (excluding up to $15 million of letters of credit), to maintain a maximum net leverage ratio (as defined in the credit agreement) of, initially, 5.25 to 1.00 for the four fiscal quarter periods preceding such day. Such maximum net leverage ratio requirement is subject to decrease during the duration of the facility to a minimum level (when applicable) of 3.50 to 1.00. In connection with the Sivomatic acquisition, the Company incurred $113.0 million of short-term debt under the Revolving Facility. As of March 31, 2019, there were $100 million in outstanding loans and $10.2 million in letters of credit outstanding under the Revolving Facility. The Company is in compliance with all the covenants associated with the Revolving Facility as of the end of the period covered by this report.

As part of the Sivomatic acquisition, the Company assumed $10.7 million in long term debt, recorded at fair value, consisting of two term loans, one of which matures in 2020 and the other of which matures in 2022. In the first quarter of 2019, the Company repaid $0.7 million on these loans.

The Company has a committed loan facility in Japan. As of March 31, 2019, $4.9 million was outstanding under this loan facility. Principal will be repaid in accordance with the payment schedule ending in 2021. The Company repaid $0.2 million on this facility during the first quarter of 2019.

As of March 31, 2019, the Company had $43.2 million in uncommitted short-term bank credit lines, of which approximately $4.7 million was in use. The credit lines are primarily outside the U.S. and are generally one year in term at competitive market rates at large, well-established institutions. The Company typically uses its available credit lines to fund working capital requirements or local capital spending needs. We anticipate that capital expenditures for 2019 should be between $70 million and $80 million, principally related to the construction of PCC plants and other opportunities that meet our strategic growth objectives. We expect to meet our other long-term financing requirements from internally generated funds, committed and uncommitted bank credit lines and, where appropriate, project financing of certain satellite plants.

On April 5, 2016, the Company entered into a floating to fixed interest rate swap for an initial aggregate notional amount of $300 million to limit exposure to interest rate increases related to a portion of the Company’s floating rate indebtedness. This swap agreement hedges a portion of contractual floating rate interest through its expiration in May 2021. As a result of the agreement, the Company’s effective fixed interest rate on the notional amount floating rate indebtedness will be 4.25%. The fair value of this instrument at March 31, 2019 was an asset of $1.9 million.

During the second quarter of 2018, the Company entered into a floating to fixed interest rate swap for a notional amount of $150 million. Additionally, the Company entered into a cross currency rate swap with a total notional value of $150 million to exchange monthly fixed-rate interest payments in U.S. dollars for monthly fixed-rate interest rate payments in Euros. These swaps mature in May 2023. As a result of these swaps, the Company’s effective fixed interest rate on the notional floating rate indebtedness will be 2.5%. The combined fair value of these instruments at March 31, 2019 was an asset of $3.8 million.

On September 21, 2017, the Company's Board of Directors authorized the Company’s management to repurchase, at its discretion, up to $150 million of the Company’s shares over a two-year period commencing October 1, 2017. As of March 31, 2019, 333,184 shares were repurchased under this program for $21.7 million, or an average price of approximately $65.12 per share.  There were no share repurchases in the first quarter of 2019.

The Company is required to make future payments under various contracts, including debt agreements and lease agreements. The Company also has commitments to fund its pension plans and provide payments for other postretirement benefit plans. During the three months ended March 31, 2019, there were no material changes in the Company’s contractual obligations. For an in-depth discussion of the Company’s contractual obligations, see “Liquidity and Capital Resources” in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

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Cautionary Statement for “Safe Harbor” Purposes under the Private Securities Litigation Reform Act of 1995

The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements made by or on behalf of the Company. This report contains statements that the Company believes may be “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934, particularly statements relating to the Company’s objectives, plans or goals, future actions, future performance or results of current and anticipated products, sales efforts, expenditures, and financial results. From time to time, the Company also provides forward-looking statements in other publicly-released materials, both written and oral. Forward-looking statements provide current expectations and forecasts of future events such as new products, revenues and financial performance, and are not limited to describing historical or current facts. They can be identified by the use of words such as “believes,” “expects,” “plans,” “intends,” “anticipates,” and other words and phrases of similar meaning.

Forward-looking statements are necessarily based on assumptions, estimates and limited information available at the time they are made. A broad variety of risks and uncertainties, both known and unknown, as well as the inaccuracy of assumptions and estimates, can affect the realization of the expectations or forecasts in these statements. Many of these risks and uncertainties are difficult to predict or are beyond the Company’s control. Consequently, no forward-looking statement can be guaranteed. Actual future results may vary materially. Significant factors affecting the expectations and forecasts are set forth under “Item 1A — Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, and in Exhibit 99 to this Quarterly Report on Form 10-Q.

The Company undertakes no obligation to update any forward-looking statements to reflect events or circumstances that arise after the date hereof. Investors should refer to the Company's subsequent filings under the Securities Exchange Act of 1934 for further disclosures.

Recently Issued Accounting Standards

Changes to accounting principles generally accepted in the United States of America (U.S. GAAP) are established by the Financial Accounting Standards Board (FASB) in the form of accounting standards updates (ASUs) to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. All recently issued ASUs were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and results of operations.

Recently Adopted Accounting Standards

On January 1, 2019, the Company adopted the provisions of ASU 2016-02, “Leases”, which requires lessees to recognize most leases on-balance sheet. The Company has adopted this new standard under the modified retrospective transition method, using the effective date as our date of initial application. As such, financial information and required disclosures will not be provided for dates prior to January 1, 2019.  The new standard provides a number of optional practical expedients in transition. We have elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We have elected the short-term lease recognition exemption for all leases that qualify. On adoption, we recognized additional operating liabilities of $61.4 million with corresponding right-of-use assets of $50.5 million based on the present value of the remaining lease payments under existing operating leases.  As of December 31, 2018, we had $10.9 million in deferred charges related to some of our real estate leases that were recorded against the right of use asset as part of the transition.  The adoption of this standard did not have a material impact on the Company's financial statements.

On January 1, 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheets as of March 31, 2019.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities.

29

On an ongoing basis, we evaluate our estimates and assumptions, including those related to revenue recognition, valuation of long-lived assets, goodwill and other intangible assets, income taxes, including valuation allowances and pension plan assumptions. We base our estimates on historical experience and on other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that cannot readily be determined from other sources. There can be no assurance that actual results will not differ from those estimates.

ITEM 3.  Quantitative and Qualitative Disclosures about Market Risk

Market risk represents the risk of loss that may impact our financial position, results of operations or cash flows due to adverse changes in market prices and foreign currency and interest rates. We are exposed to market risk because of changes in foreign currency exchange rates as measured against the U.S. dollar. We do not anticipate that near-term changes in exchange rates will have a material impact on our future earnings or cash flows. However, there can be no assurance that a sudden and significant decline in the value of foreign currencies would not have a material adverse effect on our financial condition and results of operations. A portion of our long-term bank debt bears interest at variable rates; therefore, our results of operations would be affected by interest rate changes to the extent of such outstanding bank debt. An immediate 10 percent change in interest rates would have a material effect on our results of operations over the next fiscal year. A one-percent change in interest rates, inclusive of the impact of our interest rate derivatives, would result in $3.8 million in incremental interest charges on an annual basis.

We do not enter into derivatives or other financial instruments for trading or speculative purposes. When appropriate, we enter into derivative financial instruments, such as forward exchange contracts, hedges and interest rate swaps, to mitigate the impact of foreign exchange rate movements and interest rate movements on our operating results. The counterparties are major financial institutions. Such forward exchange contracts, hedges and interest rate swaps would not subject us to additional risk from exchange rate or interest rate movements because gains and losses on these contracts would offset losses and gains on the assets, liabilities, and transactions being hedged.

On April 5, 2016, the Company entered into a floating to fixed interest rate swap for an initial aggregate notional amount of $300 million to limit exposure to interest rate increases related to a portion of the Company’s floating rate indebtedness. This swap agreement hedges a portion of contractual floating rate interest through its expiration in May 2021. As a result, the Company’s effective fixed interest rate on the notional amount floating rate indebtedness will be 4.25% through May 2021. The fair value of this instrument at March 31, 2019 was an asset of $1.9 million.

During the second quarter of 2018, the Company entered into a floating to fixed interest rate swap for a notional amount of $150 million. Additionally, the Company entered into a cross currency rate swap with a total notional value of $150 million to exchange monthly fixed-rate interest payments in U.S. dollars for monthly fixed-rate interest rate payments in Euros. These swaps mature in May 2023. As a result of these swaps, the Company’s effective fixed interest rate on the notional floating rate indebtedness will be 2.5%. The combined fair value of these instruments at March 31, 2019 was an asset of $3.8 million.

ITEM 4.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this report, and under the supervision and with participation of the Company’s management, including the Chief Executive Officer and the Chief Financial Officer, the Company carried out an evaluation of the effectiveness of the design and operation of the Company’s disclosure controls and procedures, pursuant to Exchange Act Rule 13a-15(b). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that as of the end of the period covered by this report the Company’s disclosure controls and procedures were effective.

Changes in Internal Control Over Financial Reporting

On January 1, 2019, the Company adopted the provisions of ASU No. 2016-02, "Leases (Topic 842)." Adoption of this standard did not have a material impact on the Company's financials, however, we implemented a new lease accounting system and implemented changes to our processes related to leases and related control activities.

During 2018, we closed on the acquisition of Sivomatic and we excluded Sivomatic from the scope of management's report on internal control over financial reporting for the year ended December 31, 2018.  We are in the process of integrating Sivomatic to our overall internal control over financial reporting and will include them in scope for the year ending December 31, 2019.  This process may result in additions or changes to our internal control over financial reporting.

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There were no other changes in the Company's internal controls over financial reporting during the quarter ended March 31, 2019 that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

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PART II – OTHER INFORMATION

Item 1.  Legal Proceedings

The Company and its subsidiaries are the subject of various pending legal actions in the ordinary course of their businesses. Except as described below, none of such legal proceedings are material.

Silica and Asbestos Litigation

Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials. The Company currently has three pending silica cases and forty pending asbestos cases. To date, 1,493 silica cases and 57 asbestos cases have been dismissed, not including any lawsuits against AMCOL or American Colloid Company dismissed prior to our acquisition of AMCOL. Seven new asbestos cases were filed during the first quarter of 2019, and three additional asbestos cases were filed subsequent to the end of the quarter. No asbestos or silica cases were dismissed during the period. Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any. Additional claims of this nature may be made against the Company or its subsidiaries. At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

 The Company has settled only one silica lawsuit, for a nominal amount, and no asbestos lawsuits to date (not including any that may have been settled by AMCOL prior to completion of the acquisition). We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage. The aggregate cost to the Company for the legal defense of these cases since inception continues to be insignificant. The majority of the costs of defense for these cases, excluding cases against AMCOL or American Colloid, are reimbursed by Pfizer Inc. pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. The Company is entitled to indemnification, pursuant to agreement, for sales prior to the initial public offering. Of the 40 pending asbestos cases, 29 of the non-AMCOL cases are subject to indemnification, in whole or in part, because the plaintiffs claim liability based on sales of products that occurred either entirely before the initial public offering, or both before and after the initial public offering. In five of the seven remaining non-AMCOL cases, the plaintiffs have not alleged dates of exposure, and in the remaining two non-AMCOL cases, exposure is alleged to have been after the Company's initial public offering in 1992. The remaining four cases involve AMCOL only, so no Pfizer indemnity is available. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination and assessing site-specific risks. We are awaiting regulators’ approval of the risk assessment report, which will form the basis for a proposal by the Company concerning eventual remediation.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Pursuant to a Consent Decree entered on October 24, 2014, the United States paid the Company $2.3 million in the 4th quarter of 2014 to resolve the Company’s claim for response costs for investigation and initial remediation activities at this facility through October 24, 2014. Contribution by the United States to any future costs of investigation or additional remediation has, by agreement, been left unresolved. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company’s share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2019.

The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection (“DEP”) on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010. The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater. Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2019.

32

ITEM 1A.  Risk Factors

For a description of Risk Factors, see Exhibit 99 attached to this report. There have been no material changes to our risk factors from those disclosed in our 2018 Annual Report on Form 10-K.

ITEM 2.  Unregistered Sales of Equity Securities and Use of Proceeds

On September 21, 2017, the Company's Board of Directors authorized the Company’s management to repurchase, at its discretion, up to $150 million of the Company’s shares over a two-year period commencing October 1, 2017. As of March 31, 2019, 333,184 shares were repurchased under this program for $21.7 million, or an average price of approximately $65.12 per share.  There were no share repurchases in the first quarter of 2019.

ITEM 3.  Default Upon Senior Securities

Not applicable.

ITEM 4.  Mine Safety Disclosures

The information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Quarterly Report on Form 10-Q.

ITEM 5.  Other Information

None

ITEM 6.  Exhibits

Exhibit No.	Exhibit Title
15	Letter Regarding Unaudited Interim Financial Information.
31.1	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal executive officer.
31.2	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal financial officer.
32	Section 1350 Certifications.
95	Information concerning Mine Safety Violations
99	Risk Factors
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

33

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		Minerals Technologies Inc.
	By:	/s/Matthew E. Garth
		Matthew E. Garth
		Senior Vice President, Finance and Treasury,
		Chief Financial Officer
May 3, 2019

34

EX-15

EXHIBIT 15

ACCOUNTANTS' ACKNOWLEDGEMENT

The Board of Directors

Minerals Technologies Inc.:

Re: Registration Statement Nos. 333-160002, 33-59080, 333-62739, 333-138245 and 333-206244

With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated May 3, 2019 related to our review of interim financial information.

Pursuant to Rule 436 under the Securities Act of 1933 (the Act), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG LLP

New York, New York

May 3, 2019

EX-31.1

EXHIBIT 31.1

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, Douglas T. Dietrich, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Minerals Technologies Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter ( the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors:

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 3, 2019
	By:	/s/Douglas T. Dietrich
		Douglas T. Dietrich
		Chief Executive Officer

EX-31.2

EXHIBIT 31.2

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, Matthew E. Garth, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Minerals Technologies Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter ( the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors:

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 3, 2019
	By:	/s/Matthew E. Garth
		Matthew E. Garth
		Senior Vice President, Finance and Treasury,
		Chief Financial Officer

EX-32

EXHIBIT 32

SECTION 1350 CERTIFICATIONS

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350 of Chapter 63 of Title 18, United States Code), each of the undersigned officers of Minerals Technologies Inc., a Delaware corporation (the "Company"), does hereby certify that:

The Quarterly Report on Form 10-Q for the quarter ended March 31, 2019 (the "Form 10-Q") of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:  May 3, 2019
	By:	/s/Douglas T. Dietrich
		Douglas T. Dietrich
		Chief Executive Officer

Date:  May 3, 2019
	By:	/s/Matthew E. Garth
		Matthew E. Garth
		Senior Vice President, Finance and Treasury,
		Chief Financial Officer

The foregoing certification is being furnished solely pursuant to Exchange Act Rule 13a-14(b); is not deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section; and is not deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act of 1934.

EX-95

EXHIBIT 95

Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K contain certain reporting requirements regarding coal or other mine safety.  The Company, through its subsidiaries Specialty Minerals Inc., Barretts Minerals Inc., and American Colloid Company, operates fourteen mines in the United States.  The operation of our mines is subject to regulation by the federal Mine Safety and Health Administration ("MSHA") under the Federal Mine Safety and Health Act of 1977 (the "Mine Act"). MSHA inspects our mines on a regular basis and issues various citations and orders when it believes a violation has occurred under the Mine Act.

The following table sets forth the required information with respect to each mine for which we are the operator for the period January 1, 2019 to Mar. 31, 2019:

Mine	Section 104(a) S&S		Section 104(b)		Section 104(d)		Section 110(b)(2)		Section 107(a)		Proposed Assessments		Fatalities
	(A)		(B)		(C)		(D)		(E)		(F)		(G)
Lucerne Valley, CA 04-00219		4		0		0		0		0	$	0		0
Canaan, CT 06-00019		5		0		0		0		0	$	449		0
Adams, MA 19-00035		3		0		0		0		0	$	3,456		0
Barretts Mill, Dillon, MT 24-00157		1		0		0		0		0	$	956		0
Regal Mine, Dillon, MT 24-01994		0		0		0		0		0	$	0		0
Treasure Mine, Dillon, MT 24-00160		0		0		0		0		0	$	0		0
Belle/Colony Mine, WY 48-00888		1		0		0		0		0	$	0		0
Belle Fourche Mill, SD 39-00049		0		0		0		0		0	$	118		0
Colony East, WY 48-00594		0		0		0		0		0	$	0		0
Colony West, WY 48-00245		0		0		0		0		0	$	2,837		0
Gascoyne, ND 32-00459		0		0		0		0		0	$	589		0
Lovell, WY 48-00057		0		0		0		0		0	$	907		0
Sandy Ridge, AL 01-00093		0		0		0		0		0	$	0		0
Yellowtail, WY 48-00607		0		0		0		0		0	$	0		0

(A) The total number of violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a mine safety or health hazard under section 104 of the Mine Act for which we received a citation from MSHA.

(B) The total number of orders issued under section 104(b) of the Mine Act.

(C) The total number of citations and orders for unwarrantable failure of the Company to comply with mandatory health or safety standards under section 104(d) of the Mine Act.

(D) The total number of flagrant violations under section 110(b)(2) of the Mine Act.

(E) The total number of imminent danger orders issued under section 107(a) of the Mine Act.

(F) The total dollar value of proposed assessments from MSHA under the Mine Act.

(G) The total number of mining-related fatalities, other than fatalities determined by MSHA to be unrelated to mining activity.

During the period January 1, 2019 to March 31, 2019, we did not receive any written notice from MSHA, with respect to any mine for which we are the operator, of (A) a pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of mine health and safety hazards under section 104(e) of the Mine Act or (B) the potential to have such a pattern.

The following table sets forth the required information with respect to legal actions before the Federal Mine Safety and Health Review Commission involving each mine for which we are the operator for the period January 1, 2019 to March 31, 2019:

Mine	Legal Actions Pending as of Last Day of Period	Legal Actions Initiated During Period	Legal Actions Resolved During Period
Lucerne Valley, CA	0	0	0
Canaan, CT	0	0	0
Adams, MA	0	0	0
Barretts Mill, Dillon, MT	0	0	0
Regal Mine, Dillon, MT	0	0	0
Treasure Mine, Dillon, MT	0	0	0
Belle/Colony Mine, WY	0	0	0
Belle Fourche Mill, SD	0	0	0
Colony East, WY	0	0	0
Colony West, WY	0	0	0
Gascoyne, ND	0	0	0
Lovell, WY	0	0	0
Sandy Ridge, AL	0	0	0
Yellowtail, WY	0	0	0

EX-99

EXHIBIT 99

RISK FACTORS

Our business faces significant risks.  Set forth below are all risks that we believe are material at this time.  Our business, financial condition and results of operations could be materially adversely affected by any of these risks.  These risks should be read in conjunction with the other information in the Company's Annual Report on Form 10-K for the year ended December 31, 2018, and this Quarterly Report on Form 10-Q.

Worldwide general economic, business, and industry conditions have had, and may continue to have, an adverse effect on the Company’s results.

The global economic instability experienced in recent years had caused, among other things, declining consumer and business confidence, volatile raw material prices, instability in credit markets, high unemployment, fluctuating interest and exchange rates, and other challenges in the countries in which we operate. The Company’s business and operating results had been and could once again be adversely affected by these global economic conditions. The Company’s customers and potential customers may experience deterioration of their businesses, cash flow shortages, and difficulty obtaining financing. As discussed below, the industries we serve have in the past been adversely affected by the uncertain global economic climate due to the cyclical nature of their businesses. As a result, existing or potential customers may reduce or delay their growth and investments and their plans to purchase products and may not be able to fulfill their obligations in a timely fashion. Further, suppliers could experience similar conditions, which could affect their ability to fulfill their obligations to the Company. Adversity within capital markets may also impact the Company’s results of operations by negatively affecting the amount of expense the Company records for its pension and other postretirement benefit plans. Actuarial valuations used to calculate income or expense for the plans reflect assumptions about financial market and other economic conditions – the most significant of which are the discount rate and the expected long-term rate of return on plan assets. Such actuarial valuations may change based on changes in key economic indicators. Global economic markets remain uncertain, and there can be no assurance that market conditions will improve in the near future. Future weakness in the global economy could materially and adversely affect our business and operating results.

Our customers’ businesses are cyclical or have changing regional demands. Our operations are subject to these trends and we may not be able to mitigate these risks.

Our Performance Materials segment’s sales are predominantly derived from the metalcasting market. The metalcasting market is dependent upon the demand for castings for automobile components, farm and construction equipment, oil and gas production equipment, power generation turbine castings, and rail car components. Many of these types of equipment are sensitive to fluctuations in demand during periods of recession or difficult economic conditions, which ultimately may affect the demand for our Performance Materials segment’s products and services.

In the paper industry, which is served by our Paper PCC product line, production levels for uncoated freesheet within North America and Europe, our two largest markets are projected to continue to decrease. The reduced demand for premium writing paper products has also caused recent paper mill closures.

Our Refractories segment primarily serves the steel industry.  European steel production continues to be affected by global volatility and overcapacity in the market. North American steel tariffs have stabilized current production in the United States, however, the tariffs are subject to change.

Demand for our Energy Services segment’s products and services is affected by the level of exploration, development, and production activity of, and the corresponding capital spending by, oil and natural gas companies, which are heavily influenced by the benchmark price of these commodities. Oil and natural gas prices decreased significantly in 2014 and 2015, with West Texas Intermediate (WTI) oil spot prices declining from a high of $108 per barrel in June 2014 to a low of $26 per barrel in February 2016. This has caused oil and natural gas companies to reduce their capital expenditures and production and exploration activities. This has the effect of decreasing the demand and increasing competition for the services we provide. In addition, the performance of our Energy Services segment is affected by changes in technologies, locations of customers’ targeted reserves, and competition in various geographic markets.

Our Environmental Products and Building Materials products sales are predominantly derived from the commercial construction and infrastructure markets. In addition, our Processed Minerals and Specialty PCC product lines are affected by the domestic building and construction markets, as well as the automotive market.

Demand for our products is subject to trends in these markets. During periods of economic slowdown, our customers often reduce their capital expenditures and defer or cancel pending projects. Such developments occur even amongst customers that are not experiencing financial difficulties. In addition, these trends could cause our customers to face liquidity issues or bankruptcy, which could deteriorate the aging of our accounts receivable, increase our bad debt exposure and possibly trigger impairment of assets or realignment of our businesses. The Company has taken steps to reduce its exposure to variations in its customers' businesses, including by diversifying its portfolio of products and services; through geographic expansion, and by structuring most of its long-term satellite PCC contracts to provide a degree of protection against declines in the quantity of product purchased, since the price per ton of PCC generally rises as the number of tons purchased declines. In addition, many of the Company's product lines lower its customers' costs of production or increase their productivity, which should encourage them to use its products. However, there can be no assurance that these efforts will mitigate the risks of our dependence on these industries. Continued weakness in the industries we serve has had, and may in the future have, an adverse effect on sales of our products and our results of operations. A continued or renewed economic downturn in one or more of the industries or geographic regions that the Company serves, or in the worldwide economy, could cause actual results of operations to differ materially from historical and expected results.

The Company’s results could be adversely affected if it is unable to effectively achieve and implement its growth initiatives.

Sales and income growth of the Company depends upon a number of uncertain events, including the outcome of the Company's strategies of increasing its penetration into geographic markets such as Brazil, Russia, India and China as well as other Asian and Eastern European countries; increasing its penetration into product markets such as the market for papercoating pigments and the market for groundwood paper pigments; increasing sales to existing PCC customers by increasing the amount of PCC used per ton of paper produced; developing, introducing and selling new products such as the FulFill® family of products for the paper industry. Difficulties, delays or failure of any of these strategies could affect the future growth rate of the Company. Our strategy also anticipates growth through future acquisitions. However, our ability to identify and consummate any future acquisitions on terms that are favorable to us may be limited by the number of attractive acquisition targets, internal demands on our resources and our ability to obtain financing. Our success in integrating newly acquired businesses will depend upon our ability to retain key personnel, avoid diversion of management’s attention from operational matters, and integrate general and administrative services. In addition, future acquisitions could result in the incurrence of additional debt, costs and contingent liabilities. Integration of acquired operations may take longer, or be more costly or disruptive to our business, than originally anticipated, and it is also possible that expected synergies from future acquisitions may not materialize. We also may incur costs and divert management attention with regard to potential acquisitions that are never consummated.

Servicing the Company’s debt will require a significant amount of cash. This could reduce the Company’s flexibility to respond to changing business and economic conditions or fund capital expenditures or working capital needs. Our ability to generate cash depends on many factors beyond our control.

At March 31, 2019 the Company had outstanding borrowings of $1.0 billion pursuant to our senior secured credit facility. This financing will require a significant amount of cash to make interest payments. Further, the interest rate on a significant portion of our borrowings under our senior secured credit facility is based on LIBOR interest rates, which could result in higher interest expense in the event of an increase in interest rates. Our ability to pay interest on our debt and to satisfy our other debt obligations will depend in part upon our future financial and operating performance and upon our ability to renew or refinance borrowings. Prevailing economic conditions and financial, business, competitive, regulatory and other factors, many of which are beyond our control, will affect our ability to make these payments. We cannot guarantee that our business will generate sufficient cash flow from operations or that future borrowings will be available to us in an amount sufficient to enable us to fund our liquidity needs. If we are unable to generate sufficient cash flow to meet our debt service obligations, we will have to pursue one or more alternatives, such as reducing or delaying capital or other expenditures, refinancing debt, selling assets, or raising equity capital. Further, the requirement to make significant interest payments may reduce the Company’s flexibility to respond to changing business and economic conditions or fund capital expenditure or working capital needs and may increase the Company’s vulnerability to adverse economic conditions.

Our senior secured credit facility contains various covenants that limit our ability to take certain actions and our revolving credit facility, if used, also requires us to meet financial maintenance tests, failure to comply with which could have a material adverse effect on us.

The agreement governing our senior secured credit facility contains a number of significant covenants that, among other things, limit our ability to: incur additional debt or liens, consolidate or merge with any other person, alter the business we conduct, make investments, use the proceeds of asset sales or sale/leaseback transactions, enter into hedging arrangements, pay dividends or make certain other restricted payments, create dividend or other payment restrictions with respect to subsidiaries, and enter into transactions with affiliates. In addition, our revolving credit facility, if used, requires us to comply with specific financial ratios, including a maximum net leverage ratio, under which we are required to achieve specific financial results. Commencing with the second quarter of 2018, we had borrowings under our revolving credit facility, and are therefore required to comply with such financial ratios. Our ability to comply with these provisions may be affected by events beyond our control. A breach of any of these covenants would result in a default under the agreements. In the event of any default, our lenders could elect to declare all amounts borrowed under the agreements, together with accrued interest thereon, to be due and payable. In such an event, we cannot assure you that we would have sufficient assets to pay debt then outstanding under the agreements governing our debt. Any future refinancing of the senior secured credit facility is likely to contain similar restrictive covenants.

The Company’s sales of PCC could be adversely affected by our failure to renew or extend long term sales contracts for our satellite operations.

The Company's sales of PCC to paper customers are typically pursuant to long-term evergreen agreements, initially ten years in length, with paper mills where the Company operates satellite PCC plants. Sales pursuant to these contracts represent a significant portion of our worldwide Paper PCC sales, which were $378.5 million in 2018, or approximately 21% of the Company’s net sales. The terms of many of these agreements have been extended or renewed in the past, often in connection with an expansion of the satellite plant. However, failure of a number of the Company's customers to renew or extend existing agreements on terms as favorable to the Company as those currently in effect, or at all, could have a substantial adverse effect on the Company's results of operations, and could also result in impairment of the assets associated with the PCC plant.

The Company’s sales could be adversely affected by consolidation in customer industries, principally paper, foundry and steel.

Several consolidations in the paper industry have taken place in recent years and such consolidation could continue in the future. These consolidations could result in partial or total closure of some paper mills where the Company operates PCC satellites. Such closures would reduce the Company's sales of PCC, except to the extent that they resulted in shifting paper production and associated purchases of PCC to another location served by the Company. Similarly, consolidations have occurred in the foundry and steel industries. Such consolidations in the major industries we serve concentrate purchasing power in the hands of a smaller number of manufacturers, enabling them to increase pressure on suppliers, such as the Company. This increased pressure could have an adverse effect on the Company's results of operations in the future.

The Company is subject to stringent regulation in the areas of environmental, health and safety, and tax, and may incur unanticipated costs or liabilities arising out of claims for various legal, environmental and tax matters or product stewardship issues.

The Company’s operations are subject to international, federal, state and local governmental environmental, health and safety, tax and other laws and regulations. We have expended, and may be required to expend in the future, substantial funds for compliance with such laws and regulations. In addition, future events, such as changes to or modifications of interpretations of existing laws and regulations, or enforcement polices, or further investigation or evaluation of the potential environmental impacts of operations or health hazards of certain products, may affect our mining rights or give rise to additional compliance and other costs that could have a material adverse effect on the Company. Further, certain of our customers are subject to various federal and international laws and regulations relating to environmental and health and safety matters, especially our Energy Services customers who are subject to drilling permits, waste water disposal and other regulations. To the extent that these laws and regulations affecting our customers change, demand for our products and services could also change and thereby affect our financial results. State, national, and international governments and agencies have been evaluating climate-related legislation and regulation that would restrict emissions of greenhouse gases in areas in which we conduct business, and some such legislation and regulation have already been enacted or adopted. Enactment of climate-related legislation or adoption of regulation that restrict emissions of greenhouse gases in areas in which we conduct business could have an adverse effect on our operations or demand for our products. Our manufacturing processes, particularly the manufacturing process for PCC, use a significant amount of energy and, should energy prices increase as a result of such legislation or regulation, we may not be able to pass these increased costs on to purchasers of our products. We cannot predict if or when currently proposed or additional laws and regulations regarding climate change or other environmental or health and safety concerns will be enacted or adopted.

The Company is also subject to income tax laws and regulations in the United States and various foreign jurisdictions. Significant judgment is required in evaluating and estimating our provision and accruals for these taxes. Our income tax liabilities are dependent upon the location of earnings among these different jurisdictions. Our income tax provision and income tax liabilities could be adversely affected by the jurisdictional mix of earnings, changes in valuation of deferred tax assets and liabilities and changes in tax treaties, laws and regulations, including the U.S. Tax Cuts and Jobs Act of 2017, which effected significant changes to the U.S. corporate income tax system.

The Company is currently a party in various litigation matters and tax and environmental proceedings and faces risks arising from various unasserted litigation matters, including, but not limited to, product liability, patent infringement, antitrust claims, and claims for third party property damage or personal injury stemming from alleged environmental torts. Failure to appropriately manage safety, human health, product liability and environmental risks associated with the Company’s products and production processes could adversely impact the Company’s employees and other stakeholders, the Company’s reputation and its results of operations. Public perception of the risks associated with the Company’s products and production processes could impact product acceptance and influence the regulatory environment in which the Company operates. While the Company has procedures and controls to manage these risks, carries liability insurance, which it believes to be appropriate to its businesses, and has provided reserves for current matters, which it believes to be adequate, an unanticipated liability, arising out of a current matter or proceeding or from the other risks described above, could have a material adverse effect on the Company’s financial condition or results of operations.

Delays or failures in new product development could adversely affect the Company’s operations.

The Company’s future business success will depend in part upon its ability to maintain and enhance its technological capabilities, to respond to changing customer needs, and to successfully anticipate or respond to technological changes on a cost-effective and timely basis. The Company is engaged in a continuous effort to develop new products and processes in all of its product lines. Difficulties, delays or failures in the development, testing, production, marketing or sale of such new products could cause actual results of operations to differ materially from our expected results.

The Company’s ability to compete is dependent upon its ability to defend its intellectual property against inappropriate disclosure and infringement.

The Company's ability to compete is based in part upon proprietary knowledge, both patented and unpatented. The Company's ability to achieve anticipated results depends in part on its ability to defend its intellectual property against inappropriate disclosure as well as against infringement. In addition, development by the Company's competitors of new products or technologies that are more effective or less expensive than those the Company offers could have a material adverse effect on the Company's financial condition or results of operations.

The Company’s operations could be impacted by the increased risks of doing business abroad.

The Company does business in many areas internationally. Approximately 47% of our sales in 2018 were derived from outside the United States and we have significant production facilities which are located outside of the United States. We have in recent years expanded our operations in emerging markets, and we plan to continue to do so in the future, particularly in China, India, Brazil, the Middle East, and Eastern Europe. Some of our operations are located in areas that have experienced political or economic instability, including Indonesia, Malaysia, Nigeria, Egypt, Russia, Saudi Arabia, Turkey, Brazil, Thailand, China and South Africa. The UK’s decision to exit the European Union (referred to as Brexit) has caused additional volatility in the markets and currency exchange rates. Market conditions and exchange rates could continue to be volatile in the near term as this decision is implemented. As the Company expands its operations overseas, it faces increased risks of doing business abroad, including inflation, fluctuation in interest rates, changes in applicable laws and regulatory requirements, export and import restrictions, tariffs, nationalization, expropriation, limits on repatriation of funds, civil unrest, terrorism, unstable governments and legal systems, and other factors. Many of these risks are beyond our control and can lead to sudden, and potentially prolonged, changes in demand for our products, difficulty in enforcing agreements, and losses in the realizability of our assets. Adverse developments in any of the areas in which we do business could cause actual results to differ materially from historical and expected results. In addition, a significant portion of our raw material purchases and sales outside the United States are denominated in foreign currencies, and liabilities for non-U.S. operating expenses and income taxes are denominated in local currencies. Accordingly, reported sales, net earnings, cash flows and fair values have been and, in the future, will be affected by changes in foreign currency exchange rates. Our overall success as a global business depends, in part, upon our ability to succeed in differing legal, regulatory, economic, social and political conditions. We cannot assure you that we will implement policies and strategies that will be effective in each location where we do business.

The Company’s operations are dependent on the availability of raw materials and access to ore reserves at its mining operations. Increases in costs of raw materials, energy, or shipping could adversely affect our financial results.

The Company depends in part on having an adequate supply of raw materials for its manufacturing operations, particularly lime and carbon dioxide for the PCC product line, and magnesia and alumina for its Refractory operations. Purchase prices and availability of these critical raw materials are subject to volatility. At any given time, we may be unable to obtain an adequate supply of these critical raw materials on a timely basis, on price and other terms, or at all. While most such raw materials are readily available, the Company has purchased approximately 42% of its magnesia requirements from sources in China over the past five years. The price and availability of magnesia have fluctuated in the past and they may fluctuate in the future. Price increases for certain other of our raw materials, including petrochemical products, as well as increases in energy prices, have also affected our business. Our production processes consume a significant amount of energy, primarily electricity, diesel fuel, natural gas and coal. We use diesel fuel to operate our mining and processing equipment and our freight costs are heavily dependent upon fuel prices and surcharges. Energy costs also affect the cost of raw materials. On a combined basis, these factors represent a large exposure to petrochemical and energy products which may be subject to significant price fluctuations. The contracts pursuant to which we construct and operate our satellite PCC plants generally adjust pricing to reflect the pass-through of increases in costs resulting from inflation, including energy. However, there is a time lag before such price adjustments can be implemented. The Company and its customers will typically negotiate reasonable price adjustments in order to recover these escalating costs, but there can be no assurance that we will be able to recover increasing costs through such negotiations.

The Company also depends on having adequate access to ore reserves of appropriate quality at its mining operations. There are numerous uncertainties inherent in estimating ore reserves including subjective judgments and determinations that are based on available geological, technical, contract and economic information.

The Company relies on shipping bulk cargos of bentonite from the United States, Turkey and China to customers, as well as our own subsidiaries, and we are sensitive to our ability to recover these shipping costs. In the last few years, bulk cargo shipping rates have been very volatile, and, to a lesser extent, the availability of bulk cargo containers have been suspect. If we cannot secure our container requirements or offset additional shipping costs with price increases to customers, our profitability could be impacted. We are also subject to other shipping risks. In particular, rail service interruptions have affected our ability to ship, and the availability of rail service, and our ability to recover increased rail costs, may be beyond our control.

The Company operates in very competitive industries, which could adversely affect our profitability.

The Company has many competitors. Some of our principal competitors have greater financial and other resources than we have. Accordingly, these competitors may be better able to withstand economic downturns and changes in conditions within the industries in which we operate and may have significantly greater operating and financial flexibility than we do. We also face competition for some of our products from alternative products, and some of the competition we face comes from competitors in lower-cost production countries like China and India. As a result of the competitive environment in the markets in which we operate, we currently face and will continue to face pressure on the sales prices of our products from competitors, which could reduce profit margins.

Production facilities are subject to operating risks and capacity limitations that may adversely affect the Company’s financial condition or results of operations.

The Company is dependent on the continued operation of its production facilities. Production facilities are subject to hazards associated with the manufacturing, handling, storage, and transportation of chemical materials and products, including pipeline leaks and ruptures, explosions, fires, inclement weather and natural disasters, mechanical failure, unscheduled downtime, labor difficulties, transportation interruptions, and environmental risks. We maintain property, business interruption and casualty insurance but such insurance may not cover all risks associated with the hazards of our business and is subject to limitations, including deductibles and maximum liabilities covered. We may incur losses beyond the limits, or outside the coverage, of our insurance policies. Further, from time to time, we may experience capacity limitations in our manufacturing operations. In addition, if we are unable to effectively forecast our customers’ demand, it could affect our ability to successfully manage operating capacity limitations. These hazards, limitations, disruptions in supply and capacity constraints could adversely affect financial results.

Operating results for some of our segments are seasonal.

Our Energy Services Segment and certain product lines within our Performance Materials segment are affected by seasonal weather patterns. A majority of our Energy Services revenues are derived from the Gulf of Mexico and surrounding states, which are susceptible to hurricanes that typically occur June 1^st through November 30^th. Actual or threatened hurricanes can result in volatile demand for services provided by our Energy Services segment. Our Environmental Products and Building Materials product lines within our Performance Materials segment are affected by weather patterns which determine the feasibility of construction activities. Typically, less construction activity occurs in winter months and thus this segment’s revenues tend to be greatest in the second and third quarters when weather patterns in our geographic markets are more conducive to construction activities. Our Processed Minerals product line is subject to similar seasonal patterns.

Our operations are subject to cyber-attacks that could have a material adverse impact on our business, consolidated results of operations, and consolidated financial condition.

Our operations are becoming increasingly dependent on digital technologies and services. We use these technologies for internal purposes, including data storage, processing, and transmissions, as well as in our interactions with customers and suppliers. Digital technologies are subject to the risk of cyber-attacks. If our systems for protecting against cybersecurity risks prove not to be sufficient, we could be adversely affected by, among other things: loss of or damage to intellectual property, proprietary or confidential information, or customer, supplier, or employee data; interruption of our business operations; and increased costs required to prevent, respond to, or mitigate cybersecurity attacks. These risks could harm our reputation and our relationships with customers, suppliers, employees, and other third parties, and may result in claims against us. In addition, these risks could have a material adverse effect on our business, consolidated results of operations, and consolidated financial condition.

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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 22, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	MINERALS TECHNOLOGIES INC
Entity Central Index Key	0000891014
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		35,235,161
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Statements of Income [Abstract]
Total net sales	$ 437.7	$ 431.3
Total cost of sales	328.0	317.8
Production margin	109.7	113.5
Marketing and administrative expenses	42.9	44.4
Research and development expenses	4.8	6.1
Acquisition related transaction and integration costs	0.0	0.4
Income from operations	62.0	62.6
Interest expense, net	(11.4)	(10.7)
Other non-operating deductions, net	(1.4)	(2.7)
Total non-operating deductions, net	(12.8)	(13.4)
Income from operations before tax and equity in earnings	49.2	49.2
Provision for taxes on income	9.3	9.3
Equity in earnings of affiliates, net of tax	0.1	1.2
Consolidated net income	40.0	41.1
Less: Net income attributable to non-controlling interests	0.9	1.2
Net income attributable to Minerals Technologies Inc.	$ 39.1	$ 39.9
Basic:
Income from operations attributable to Minerals Technologies Inc. (in dollars per share)	$ 1.11	$ 1.13
Diluted:
Income from operations attributable to Minerals Technologies Inc. (in dollars per share)	1.11	1.12
Cash dividends declared per common share (in dollars per share)	$ 0.05	$ 0.05
Shares used in computation of earnings per share:
Basic (in shares)	35.2	35.4
Diluted (in shares)	35.3	35.7
Product [Member]
Statements of Income [Abstract]
Total net sales	$ 417.4	$ 412.2
Total cost of sales	314.0	305.0
Service [Member]
Statements of Income [Abstract]
Total net sales	20.3	19.1
Total cost of sales	$ 14.0	$ 12.8

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Consolidated net income	$ 40.0	$ 41.1
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(0.4)	15.2
Pension and postretirement plan adjustments	1.6	1.9
Unrealized gains on derivative instruments	1.2	1.6
Total other comprehensive income, net of tax	2.4	18.7
Total comprehensive income including non-controlling interests	42.4	59.8
Comprehensive income attributable to non-controlling interests	(1.4)	(1.8)
Comprehensive income attributable to Minerals Technologies Inc.	$ 41.0	$ 58.0

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2019	[1]	Dec. 31, 2018	[2]
Current assets:
Cash and cash equivalents	$ 202.7		$ 208.8
Short-term investments	4.3		3.8
Accounts receivable, net	406.4		387.3
Inventories	254.4		239.2
Prepaid expenses and other current assets	36.1		37.2
Total current assets	903.9		876.3
Property, plant and equipment	2,269.0		2,256.0
Less accumulated depreciation and depletion	(1,167.9)		(1,153.1)
Property, plant and equipment, net	1,101.1		1,102.9
Goodwill	812.4		812.4
Intangible assets	211.8		214.1
Deferred income taxes	24.8		26.3
Other assets and deferred charges	109.4		55.1
Total assets	3,163.4		3,087.1
Current liabilities:
Short-term debt	104.7		105.2
Current maturities of long-term debt	2.7		3.3
Accounts payable	178.2		169.1
Other current liabilities	105.2		104.3
Total current liabilities	390.8		381.9
Long-term debt, net of unamortized discount and deferred financing costs	893.4		907.8
Deferred income taxes	198.1		196.8
Accrued pension and post-retirement benefits	124.0		124.2
Other non-current liabilities	129.7		91.1
Total liabilities	1,736.0		1,701.8
Shareholders' equity:
Common stock	4.9		4.9
Additional paid-in capital	432.6		431.9
Retained earnings	1,817.4		1,769.1
Accumulated other comprehensive loss	(242.7)		(233.7)
Less common stock held in treasury	(618.7)		(618.7)
Total Minerals Technologies Inc. shareholders' equity	1,393.5		1,353.5
Non-controlling interests	33.9		31.8
Total shareholders' equity	1,427.4		1,385.3
Total liabilities and shareholders' equity	$ 3,163.4		$ 3,087.1

[1] Unaudited

[2] Condensed from audited financial statements

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Apr. 01, 2018
Operating Activities:
Consolidated net income	$ 40.0		$ 41.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	24.5		21.1
Amortization of right of use asset	3.4		0.0
Other non-cash items	2.1		(1.1)
Net changes in operating assets and liabilities	(39.2)		(25.4)
Net cash provided by operating activities	30.8		35.7
Investing Activities:
Purchases of property, plant and equipment, net	(17.6)		(17.9)
Proceeds from sale of short-term investments	0.9		0.7
Purchases of short-term investments	(1.5)		(2.0)
Net cash used in investing activities	(18.2)		(19.2)
Financing Activities:
Repayment of long-term debt	(15.8)		(0.4)
Repayment of short-term debt	(0.6)		0.0
Purchase of common stock for treasury	0.0		(5.7)
Proceeds from issuance of stock under option plan	0.1		0.6
Excess tax benefits related to stock incentive programs	(1.9)		(3.2)
Dividends paid to non-controlling interests	(0.1)		(0.1)
Capital contribution from non-controlling interests	0.8		0.0
Cash dividends paid	(1.7)		(1.8)
Net cash used in financing activities	(19.2)		(10.6)
Effect of exchange rate changes on cash and cash equivalents	0.5		5.1
Net (decrease) increase in cash and cash equivalents	(6.1)		11.0
Cash and cash equivalents at beginning of period	208.8	[1]	212.2
Cash and cash equivalents at end of period	202.7	[2]	223.2
Supplemental disclosure of cash flow information:
Interest paid	10.9		10.5
Income taxes paid	5.8		4.0
Non-cash financing activities:
Treasury stock purchases settled after period end	$ 0.0		$ 0.3

[1] Condensed from audited financial statements

[2] Unaudited

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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Non-controlling Interests [Member]	Total
Balance at Dec. 31, 2017	$ 4.9	$ 422.7	$ 1,607.2	$ (186.1)	$ (597.0)	$ 27.4	$ 1,279.1
Net income	0.0	0.0	39.9	0.0	0.0	1.2	41.1
Other comprehensive income	0.0	0.0	0.0	18.2	0.0	0.5	18.7
Dividends declared	0.0	0.0	(1.8)	0.0	0.0	0.0	(1.8)
Dividends paid to non-controlling interests	0.0	0.0	0.0	0.0	0.0	(0.2)	(0.2)
Issuance of shares pursuant to employee stock compensation plans	0.0	0.5	0.0	0.0	0.0	0.0	0.5
Purchase of common stock for treasury	0.0	0.0	0.0	0.0	(5.7)	0.0	(5.7)
Balance at Apr. 01, 2018	4.9	423.2	1,645.3	(167.9)	(602.7)	29.0	1,331.8
Cumulative effect of accounting change | ASU 2018-02 [Member]	0.0	0.0	10.9	(10.9)	0.0	0.0	0.0
Balance at Dec. 31, 2018	4.9	431.9	1,769.1	(233.7)	(618.7)	31.8	1,385.3	[1]
Net income	0.0	0.0	39.1	0.0	0.0	0.9	40.0
Other comprehensive income	0.0	0.0	0.0	1.9	0.0	0.5	2.4
Dividends declared	0.0	0.0	(1.7)	0.0	0.0	0.0	(1.7)
Dividends paid to non-controlling interests	0.0	0.0	0.0	0.0	0.0	(0.1)	(0.1)
Capital contribution from non-controlling interests	0.0	0.0	0.0	0.0	0.0	0.8	0.8
Issuance of shares pursuant to employee stock compensation plans	0.0	0.1	0.0	0.0	0.0	0.0	0.1
Stock-based compensation	0.0	0.6	0.0	0.0	0.0	0.0	0.6
Balance at Mar. 31, 2019	$ 4.9	$ 432.6	1,817.4	(242.7)	$ (618.7)	$ 33.9	$ 1,427.4	[2]
Cumulative effect of accounting change | ASU 2018-02 [Member]			$ 10.9	$ (10.9)

[1] Condensed from audited financial statements

[2] Unaudited

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Basis of Presentation and Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

Basis of Presentation and Summary of Significant Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Note 1.  Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements have been prepared by management of Minerals Technologies Inc. (the “Company”, “MTI”, “we”, or “us”) in accordance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted. Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2018. In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included. The results for the three-month periods ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019.

Company Operations

The Company is a resource- and technology-based company that develops, produces and markets worldwide a broad range of specialty mineral, mineral-based and synthetic mineral products and supporting systems and services.

The Company has four reportable segments: Performance Materials, Specialty Minerals, Refractories and Energy Services.

– The Performance Materials segment is a leading global supplier of bentonite and bentonite-related products, chromite and leonardite. This segment also provides products for non-residential construction, environmental and infrastructure projects worldwide, serving customers engaged in a broad range of construction projects.

– The Specialty Minerals segment produces and sells the synthetic mineral product precipitated calcium carbonate ("PCC") and processed mineral product quicklime ("lime"), and mines mineral ores then processes and sells natural mineral products, primarily limestone and talc.

– The Refractories segment produces and markets monolithic and shaped refractory materials and specialty products, services and application and measurement equipment, and calcium metal and metallurgical wire products.

– The Energy Services segment provides services to improve the production, costs, compliance, and environmental impact of activities performed in the oil and gas industry. This segment offers a range of patented and unpatented technologies, products and services to the upstream and downstream oil and gas sector throughout the world.

Use of Estimates

The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, valuation of long-lived assets, goodwill and other intangible assets, income taxes, including valuation allowances, and pension plan assumptions. Actual results could differ from those estimates.

Recently Issued Accounting Standards

Changes to accounting principles generally accepted in the United States of America (U.S. GAAP) are established by the Financial Accounting Standards Board (FASB) in the form of accounting standards updates (ASUs) to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. All recently issued ASUs were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and results of operations.

Recently Adopted Accounting Standards

On January 1, 2019, the Company adopted the provisions of ASU 2016-02, “Leases”, which requires lessees to recognize most leases on-balance sheet. The Company has adopted this new standard under the modified retrospective transition method, using the effective date as our date of initial application. As such, financial information and required disclosures will not be provided for dates prior to January 1, 2019.  The new standard provides a number of optional practical expedients in transition. We have elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We have elected the short-term lease recognition exemption for all leases that qualify. On adoption, we recognized additional operating liabilities of $61.4 million with corresponding right-of-use assets of $50.5 million based on the present value of the remaining lease payments under existing operating leases.  As of December 31, 2018, we had $10.9 million in deferred charges related to some of our real estate leases that were recorded against the right of use asset as part of the transition.  The adoption of this standard did not have a material impact on the Company's financial statements.

On January 1, 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheets as of March 31, 2019.

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Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

Note 2.  Leases

We determine if an arrangement is a lease at inception.  The Company has operating leases for premises, equipment, rail cars and automobiles.   Our leases have remaining lease terms of 1 year to 50 years, some of which may include options to extend the leases further. The Company considers these options in determining the lease term used to establish the right-of-use assets and lease liabilities.  As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based upon the information available at commencement date, or as of implementation of ASC 842, in determining the present value of lease payments.

Leases with an initial term of 12 months or less are not recorded on the balance sheet. We recognize lease expense for these leases on a straight-line basis over the lease term. Certain lease agreements contain both lease and non-lease components. We account for lease components together with non-lease components.

Operating lease cost for the quarter ended March 31, 2019 was $4.1 million.  Components of lease cost of are as follows:

(millions of dollars)	Mar. 31, 2019
Operating lease cost	$	4.0
Short-term lease cost	$	0.1

Supplemental cash flow information and non-cash activity related to our operating leases are as follows:

(millions of dollars)	Mar. 31, 2019
Operating cash flows information:
Cash paid for amounts included in the measurement of lease liabilities	$	4.0
Non-cash activity:
Right-of-use assets obtained in the exchange for operating lease liabilities	$	0.2

          Weighted average remaining lease term, and weighted average discount rates related to the Company’s operating leases were as follows:

Weighted-average remaining operating lease term (in years)	7.87
Weighted-average operating leases discount rate	5.0%

The following table summarizes the Company's outstanding lease assets and liabilities and their classification on the Condensed Consolidated Balance Sheet:

(millions of dollars)	Balance Sheet Classification	Mar. 31, 2019
Right-of-use asset	Other assets and deferred charges	$	47.4
Lease liability - current	Other current liabilities		12.3
Lease liability - non-current	Other non-current liabilities		46.1

Future minimum lease payments under the Company's operating leases as of March 31, 2019 were as follows:

(millions of dollars)	Mar. 31, 2019
For the remainder of 2019	$	11.5
2020		12.3
2021		9.0
2022		7.2
2023		5.9
Thereafter		25.3
Total future minimum lease payments		71.2
Less imputed interest		(13.0	)
Total	$	58.2

As of December 31, 2018, minimum lease payments under non-cancellable operating leases were expected to be as follows:

(millions of dollars)	Dec. 31, 2018
2019	$	17.3
2020		13.0
2021		9.5
2022		8.2
2023		7.0
Thereafter		24.8
Total	$	79.8

A summary of rent expense for the fiscal years ended December 31, 2018 and December 31, 2017 was as follows:

(millions of dollars)	Dec. 31, 2018		Dec. 31, 2017
Rent expense	$	19.5	$	19.3

The Company has certain arrangements under which we are the lessor.  Lease income associated with these leases is not material.

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2019

Revenue from Contracts with Customers [Abstract]

Revenue from Contracts with Customers

Note 3.  Revenue from Contracts with Customers

The following table disaggregates our revenue by major source (product line) for the three-month periods ended March 31, 2019 and April 1, 2018:

(millions of dollars)	Three Months Ended
Net Sales	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Performance Materials		199.2		187.3
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Specialty Minerals		144.4		149.6
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

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Business Combination

3 Months Ended

Mar. 31, 2019

Business Combination [Abstract]

Business Combination

Note 4.  Business Combination

On April 30, 2018, the Company completed the acquisition of Sivomatic Holding B.V. (“Sivomatic”), a leading European supplier of premium pet litter products. Sivomatic is a vertically integrated manufacturer, with production facilities in the Netherlands, Austria and Turkey. With a leading position in premier clumping products, Sivomatic’s product portfolio spans the range of pet litter derived from bentonite, sourced predominantly from wholly-owned mines in Turkey. The results of Sivomatic are included in our Performance Materials segment. The acquisition was financed through a combination of cash on hand and borrowings under the Company’s credit facilities. The fair value of the total consideration transferred, net of cash acquired, was $122.5 million.

The acquisition has been accounted for using the acquisition method of accounting, which requires, among other things, that we recognize the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. As of March 31, 2019, the purchase price allocation remains preliminary as the Company completes its assessment of property, mineral rights, certain reserves including environmental, legal and tax matters, obligations, intangible assets, taxes payable, impact of foreign exchange and deferred taxes, as well as complete our review of Sivomatic’s existing accounting policies.

The following table summarizes the Company’s preliminary purchase price allocation for the Sivomatic acquisition as of March 31, 2019, as compared with the allocation previously reported on the Company's Form 10-K for the year ended December 31, 2018:

(millions of dollars)	Preliminary Allocation Previously Reported on Form 10-K as of December 31, 2018		Increase/ (Decrease)		Allocation as of March 31, 2019
Accounts receivable	$	24.4	$	—	$	24.4
Inventories		15.6		—		15.6
Other current assets		0.6		—		0.6
Mineral rights		39.7		—		39.7
Property, plant and equipment		28.3		—		28.3
Goodwill		35.0		—		35.0
Intangible assets		26.4		—		26.4
Total assets acquired		170.0		—		170.0
Current maturity of long-term debt		5.7		—		5.7
Accounts payable		9.0		—		9.0
Accrued expenses		5.6		—		5.6
Long-term debt		5.3		—		5.3
Non-current deferred tax liability		19.7		—		19.7
Other non-current liabilities		2.2		—		2.2
Total liabilities assumed		47.5		—		47.5
Net assets acquired	$	122.5	$	—	$	122.5

The Company used the income, market, or cost approach (or a combination thereof) for the preliminary valuation, and used valuation inputs and analyses that were based on market participant assumptions. Market participants are considered to be buyers and sellers unrelated to the Company in the principal or most advantageous market for the asset or liability. For certain items, the carrying value was determined to be a reasonable approximation of fair value based on the information available.

Goodwill was calculated as the excess of the consideration transferred over the assets acquired and represents the estimated future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. The allocation will be completed during the second quarter of 2019. Goodwill recognized as a result of this acquisition is not deductible for tax purposes.

In connection with the acquisition, the Company recorded an additional deferred tax liability of $18.8 million with a corresponding increase to goodwill. The increase in the deferred tax liability represents the tax effect of the difference between the estimated assigned fair value of the tangible and intangible assets and the tax basis of such assets.

Mineral rights were valued using discounted cash flow method. Property, plant and equipment were valued using the cost method adjusted for age and deterioration.

Intangible assets acquired mainly include tradenames and customer relationships. Both tradenames and customer relationships have an estimated useful life of approximately 20 years.

The Company did not present pro forma and other financial information for the Sivomatic acquisition, as this is not considered to be a material business combination.

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Earnings per Share (EPS)

3 Months Ended

Mar. 31, 2019

Earnings per Share (EPS) [Abstract]

Earnings per Share (EPS)

Note 5.  Earnings per Share (EPS)

Basic earnings per share are based upon the weighted average number of common shares outstanding during the period. Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all potentially dilutive common shares outstanding.

The following table sets forth the computation of basic and diluted earnings per share:

	Three Months Ended
(in millions, except per share data)	Mar. 31, 2019		Apr. 1, 2018
Net income attributable to Minerals Technologies Inc.	$	39.1	$	39.9
Weighted average shares outstanding		35.2		35.4
Dilutive effect of stock options and stock units		0.1		0.3
Weighted average shares outstanding, adjusted		35.3		35.7
Basic earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.13
Diluted earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.12

Options to purchase 748,754 shares and 362,443 shares of common stock for the three-month periods ended March 31, 2019 and April 1, 2018, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.

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Restructuring and Other Items, net

3 Months Ended

Mar. 31, 2019

Restructuring and Other Items, net [Abstract]

Restructuring and Other Items, net

Note 6.  Restructuring and Other Items, net

At March 31, 2019, the Company had $2.3 million included within accrued liabilities in the Condensed Consolidated Balance Sheet for cash expenditures needed to satisfy remaining obligations under workforce reduction initiatives. The Company expects to pay these amounts by the end of 2019.

The following table is a reconciliation of our restructuring liability balance as of March 31, 2019 :

(millions of dollars)
Restructuring liability, December 31, 2018	$	2.5
Cash payments		(0.2	)
Restructuring liability,  March 31, 2019	$	2.3

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Income Taxes

3 Months Ended

Mar. 31, 2019

Income Taxes [Abstract]

Income Taxes

Note 7.  Income Taxes

Provision for taxes was $9.3 million during the three-month periods ended March 31, 2019 and April 1, 2018. The effective tax rate was 18.9% for the three-month periods ended March 31, 2019 and April 1, 2018.

As of March 31, 2019, the Company had approximately $17.0 million of total unrecognized income tax benefits. Included in this amount were a total of $13.3 million of unrecognized income tax benefits that, if recognized, would affect the Company’s effective tax rate. While it is expected that the amount of unrecognized tax benefits will change in the next 12 months, the Company does not expect the change to have a significant impact on the results of operations or the financial position of the Company.

The Company’s accounting policy is to recognize interest and penalties accrued relating to unrecognized income tax benefits as part of its provision for income taxes. The Company had a net increase of approximately $0.3 million during the three-months ended March 31, 2019 and had an accrued balance of $2.9 million and $1.8 million of interest and penalties as of March 31, 2019 and April 1, 2018, respectively.

The Company operates in multiple taxing jurisdictions, both within and outside the U.S. In certain situations, a taxing authority may challenge positions that the Company has adopted in its income tax filings. The Company, with a few exceptions (none of which are material), is no longer subject to income tax examinations by tax authorities for years prior to 2010.

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Inventories

3 Months Ended

Mar. 31, 2019

Inventories [Abstract]

Inventories

Note 8.  Inventories

The following is a summary of inventories by major category:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Raw materials	$	102.8	$	93.4
Work-in-process		10.2		11.2
Finished goods		97.5		92.2
Packaging and supplies		43.9		42.4
Total inventories	$	254.4	$	239.2

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

Note 9.  Goodwill and Other Intangible Assets

Goodwill and other intangible assets with indefinite lives are not amortized, but instead are assessed for impairment, at least annually. The carrying amount of goodwill was $812.4 million as of March 31, 2019 and December 31, 2018.

Intangible assets subject to amortization as of March 31, 2019 and December 31, 2018 were as follows:

			Mar. 31, 2019				Dec. 31, 2018
(millions of dollars)	Weighted Average Useful Life (Years)		Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Tradenames		35	$	204.2	$	28.1	$	204.2	$	26.6
Technology		13		18.8		6.8		18.8		6.4
Patents		19		6.4		5.7		6.4		5.6
Customer relationships		22		26.5		3.5		26.5		3.2
		32	$	255.9	$	44.1	$	255.9	$	41.8

The weighted average amortization period for acquired intangible assets subject to amortization is approximately 32 years. Estimated amortization expense is $7.0 million for the remainder of 2019, $36.7 million for 2020–2023 and $168.1 million thereafter.

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Derivative Financial Instruments

3 Months Ended

Mar. 31, 2019

Derivative Financial Instruments [Abstract]

Derivative Financial Instruments

Note 10.  Derivative Financial Instruments

As a multinational corporation with operations throughout the world, the Company is exposed to certain market risks. The Company uses a variety of practices to manage these market risks, including, when considered appropriate, derivative financial instruments. The Company's objective is to offset gains and losses resulting from interest rates and foreign currency exposures with gains and losses on the derivative contracts used to hedge them. The Company uses derivative financial instruments only for risk management and not for trading or speculative purposes.

By using derivative financial instruments to hedge exposures to changes in interest rates and foreign currencies, the Company exposes itself to credit risk and market risk. Credit risk is the risk that the counterparty will fail to perform under the terms of the derivative contract. When the fair value of a derivative contract is positive, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative contract is negative, the Company owes the counterparty, and therefore, it does not face any credit risk. The Company minimizes the credit risk in derivative instruments by entering into transactions with major financial institutions.

Market risk is the adverse effect on the value of a financial instrument that results from a change in interest rates, currency exchange rates, or commodity prices. The market risk associated with interest rate and forward exchange contracts is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

Cash Flow Hedges

For derivative instruments that are designated and qualify as cash flow hedges, the Company records the effective portion of the gain or loss in accumulated other comprehensive income (loss) as a separate component of shareholders' equity. The Company subsequently reclassifies the effective portion of gain or loss into earnings in the period during which the hedged transaction is recognized in earnings.

The Company utilizes interest rate swaps to limit exposure to market fluctuations on floating-rate debt. In the second quarter of 2018, the Company entered into a floating to fixed interest rate swap for a notional amount of $150 million. The fair value of this swap is a liability of $4.1 million at March 31, 2019 and is recorded in other non-current liabilities on the Condensed Consolidated Balance Sheet. In addition, in the second quarter of 2016, the Company entered into a floating to fixed interest rate swap with an initial aggregate notional amount of $300 million. The notional amount was $129 million at March 31, 2019. The fair value of this swap is an asset of $1.9 million at March 31, 2019 and is recorded in other assets and deferred charges on the Condensed Consolidated Balance Sheet. These interest rate swaps are designated as cash flow hedges. As a result, the gains and losses associated with these interest rate swaps are recorded in accumulated other comprehensive income (loss).

Net Investment Hedges

For derivative instruments that are designated and qualify as net investment hedges, the Company records the effective portion of the gain or loss in accumulated other comprehensive income (loss) as a separate component of shareholders' equity.

To protect the value of our investments in our foreign operations against adverse changes in foreign currency exchange rates, the Company from time to time hedges a portion of our net investment in one or more of our foreign subsidiaries. During the second quarter of 2018, the Company entered into a cross currency rate swap with a total notional value of $150 million to exchange monthly fixed-rate interest payments in U.S. dollars for monthly fixed-rate interest rate payments in Euros. This contract matures in May 2023 and requires the exchange of Euros and U.S. dollar principal payments upon maturity. The fair value of this swap is an asset of $7.9 million at March 31, 2019 and is recorded in other assets and deferred charges on the Condensed Consolidated Balance Sheet. Changes in the fair value of this financial instrument are recognized in accumulated other comprehensive income (loss) to offset the change in the carrying amount of the net investment being hedged. Amounts are reclassified out of accumulated other comprehensive income (loss) into earnings when the hedged net investment is either sold or substantially liquidated.

Assets and liabilities measured at fair value are based on one or more of three valuation techniques. The three valuation techniques are as follows:

● Market approach - prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

● Cost approach - amount that would be required to replace the service capacity of an asset or replacement cost.

● Income approach - techniques to convert future amounts to a single present amount based on market expectations, including present value techniques, option-pricing and other models.

The Company primarily applies the income approach for interest rate derivatives for recurring fair value measurements and attempts to utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.

The fair value of our interest rate swaps and cross currency rate swap contracts are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets and are categorized as Level 2.

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Long-Term Debt and Commitments

3 Months Ended

Mar. 31, 2019

Long-Term Debt and Commitments [Abstract]

Long-Term Debt and Commitments

Note 11.  Long-Term Debt and Commitments

The following is a summary of long-term debt:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Term Loan Facility-Variable Tranche due February 14, 2024, net of unamortized discount and deferred financing costs of $18.6 million and $19.4 million	$	639.4	$	638.6
Term Loan Facility- Fixed Tranche due May 9, 2021, net of unamortized discount and deferred financing costs of $0.3 million and $0.3 million		247.8		262.6
Netherlands Term Loan due 2020		2.8		3.4
Netherlands Term Loan due 2022		1.2		1.4
Japan Loan Facilities		4.9		5.1
Total		896.1		911.1
Less: Current maturities		2.7		3.3
Total long-term debt	$	893.4	$	907.8

On May 9, 2014, in connection with the acquisition of AMCOL International Corporation (“AMCOL”), the Company entered into a credit agreement providing for a $1.560 billion senior secured term loan facility (the “Term Facility”) and a $200 million senior secured revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Facilities”).

On June 23, 2015, the Company entered into an amendment (the “First Amendment”) to the credit agreement to reprice the $1.378 billion then outstanding on the Term Facility. As amended, the Term Facility had a $1.078 billion floating rate tranche and a $300 million fixed rate tranche. On February 14, 2017, the Company entered into an amendment (the “Second Amendment”) to the credit agreement to reprice the $788 million floating rate tranche then outstanding, which extended the maturity and lowered the interest costs by 75 basis points. On April 18, 2018, the Company entered into an amendment (the “Third Amendment”) to the credit agreement to refinance the Revolving Facility. As amended, the Revolving Facility has been increased to $300 million in aggregate commitments. Following the amendments, the loans outstanding under the floating rate tranche of the Term Facility will mature on February 14, 2024, the loans outstanding under the fixed rate tranche of the Term Facility will mature on May 9, 2021 and the loans outstanding (if any) and commitments under the Revolving Facility will mature and terminate, as the case may be, on April 18, 2023. Loans under the floating rate tranche of the Term Facility bear interest at a rate equal to an adjusted LIBOR rate (subject to a floor of 0.75%) plus an applicable margin equal to 2.25% per annum. Loans under the fixed rate tranche of the Term Facility bear interest at a rate of 4.75%. Loans under the Revolving Facility bear interest at a rate equal to an adjusted LIBOR rate plus an applicable margin equal to 1.625% per annum. Such rates are subject to decrease by up to 25 basis points in the event that, and for so long as, the Company’s net leverage ratio (as defined in the credit agreement) is less than certain thresholds. The floating rate tranche of the Term Facility was issued at par and the fixed rate tranche of the Term Facility was issued at a 0.25% discount in connection with the First Amendment. The variable rate tranche of the Term Facility was issued at a 0.25% discount in connection with the Second Amendment. The variable rate tranche has a 1% required amortization per year. The Company will pay certain fees under the credit agreement, including customary annual administration fees. The obligations of the Company under the Facilities are unconditionally guaranteed jointly and severally by, subject to certain exceptions, all material domestic subsidiaries of the Company (the “Guarantors”) and secured, subject to certain exceptions, by a security interest in substantially all of the assets of the Company and the Guarantors.

During the first quarter of 2019, the Company repaid $15 million on its Term Facility.

The credit agreement contains certain customary affirmative and negative covenants that limit or restrict the ability of the Company and its restricted subsidiaries to enter into certain transactions or take certain actions. In addition, the credit agreement contains a financial covenant that requires the Company, if on the last day of any fiscal quarter loans or letters of credit were outstanding under the Revolving Facility (excluding up to $15 million of letters of credit), to maintain a maximum net leverage ratio (as defined in the credit agreement) of, initially, 5.25 to 1.00 for the four fiscal quarters preceding such day. Such maximum net leverage ratio requirement is subject to decrease during the duration of the facility to a minimum level (when applicable) of 3.50 to 1.00.  In connection with the Sivomatic acquisition, the Company incurred $113 million of short-term debt under the Revolving Facility. As of March 31, 2019, there were $100 million in outstanding loans and $10.2 million in letters of credit outstanding under the Revolving Facility. The Company is in compliance with all the covenants associated with the Revolving Facility as of the end of the period covered by this report.

As part of the Sivomatic acquisition, the Company assumed $10.7 million in long-term debt, recorded at fair value, consisting of two term loans, one of which matures in 2020 and the other of which matures in 2022. These loans carry an interest rate of Euribor plus 2.0% and have quarterly repayments. During the first quarter of 2019, the Company repaid $0.7 million on these loans.

The Company has a committed loan facility in Japan. As of March 31, 2019, $4.9 million was outstanding under this loan facility. Principal will be repaid in accordance with the payment schedule ending in 2021. The Company repaid $0.2 million on this facility during the first quarter of 2019.

As of March 31, 2019, the Company had $43.2 million in uncommitted short-term bank credit lines, of which approximately $4.7 million was in use.

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Benefit Plans

3 Months Ended

Mar. 31, 2019

Benefit Plans [Abstract]

Benefit Plans

Note 12.  Benefit Plans

The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees. Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation.

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	1.8		$	2.0
Interest cost		3.5			3.0
Expected return on plan assets		(4.6	)		(4.8	)
Amortization:
Prior service cost		0.1			0.2
Recognized net actuarial loss		2.3			2.7
Net periodic benefit cost	$	3.1		$	3.1

	Other Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	—		$	0.1
Interest cost		0.1			0.1
Amortization:
Prior service cost		—			(0.3	)
Recognized net actuarial (gain)		(0.2	)		(0.2	)
Net periodic benefit cost	$	(0.1	)	$	(0.3	)

Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income.

The Company expects to contribute approximately $9.7 million to its pension plans and $0.3 million to its other postretirement benefit plans in 2019. As of March 31, 2019, approximately $1.4 million has been contributed to the pension plans and no contributions to the other postretirement benefit plans.

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Comprehensive Income

3 Months Ended

Mar. 31, 2019

Comprehensive Income [Abstract]

Comprehensive Income

Note 13.  Comprehensive Income

The following table summarizes the amounts reclassified out of accumulated other comprehensive loss attributable to the Company:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Amortization of pension items:
Pre-tax amount	$	2.2		$	2.4
Tax		(0.6	)		(0.5	)
Net of tax	$	1.6		$	1.9

The pre-tax amounts in the table above are included within the components of net periodic pension benefit cost (see Note 12 to the Condensed Consolidated Financial Statements) and the tax amounts are included within the provision for taxes on income line within the Condensed Consolidated Statements of Income.

The major components of accumulated other comprehensive loss, net of related tax, attributable to MTI are as follows:

(millions of dollars)	Foreign Currency Translation Adjustment			Unrecognized Pension Costs			Net Gain (Loss) on Derivative Instruments			Total
Balance as of December 31, 2018	$	(170.1	)	$	(69.7	)	$	6.1		$	(233.7	)
Other comprehensive loss before reclassifications		(1.0	)		—			1.3			0.3
Amounts reclassified from AOCI		—			1.6			—			1.6
Net current period other comprehensive income (loss)		(1.0	)		1.6			1.3			1.9
Cumulative effect of accounting change		—			(10.4	)		(0.5	)		(10.9	)
Balance as of March 31, 2019	$	(171.1	)	$	(78.5	)	$	6.9		$	(242.7	)

In January 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheet as of March 31, 2019.

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Accounting for Asset Retirement Obligations

3 Months Ended

Mar. 31, 2019

Accounting for Asset Retirement Obligations [Abstract]

Accounting for Asset Retirement Obligations

Note 14.  Accounting for Asset Retirement Obligations

The Company records asset retirement obligations for situations in which the Company will be required to incur costs to retire tangible long-lived assets. The fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made.

The Company also records liabilities related to land reclamation as a part of asset retirement obligations. The Company mines various minerals using a surface mining process that requires the removal of overburden. In certain areas and under various governmental regulations, the Company is obligated to restore the land comprising each mining site to its original condition at the completion of the mining activity. The obligation is adjusted to reflect the passage of time, mining activities, and changes in estimated future cash outflows.

The following is a reconciliation of asset retirement obligations as of March 31, 2019:

(millions of dollars)
Asset retirement liability, December 31, 2018	$	23.4
Accretion expense		0.9
Payments		(0.7	)
Asset retirement liability, March 31, 2019	$	23.6

The asset retirement costs are capitalized as part of the carrying amount of the associated asset. The current portion of the liability of approximately $0.4 million is included in other current liabilities and the long-term portion of the liability of approximately $23.2 million is included in other non-current liabilities in the Condensed Consolidated Balance Sheet as of March 31, 2019.

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Contingencies

3 Months Ended

Mar. 31, 2019

Contingencies [Abstract]

Contingencies

Note 15.  Contingencies

The Company is party to a number of lawsuits arising in the normal course of our business.

Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials. The Company currently has three pending silica cases and forty pending asbestos cases. To date, 1,493 silica cases and 57 asbestos cases have been dismissed, not including any lawsuits against AMCOL or American Colloid Company dismissed prior to our acquisition of AMCOL. Seven new asbestos cases were filed during the first quarter of 2019, and three additional asbestos cases were filed subsequent to the end of the quarter. No asbestos or silica cases were dismissed during the period. Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any. Additional claims of this nature may be made against the Company or its subsidiaries. At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

 The Company has settled only one silica lawsuit, for a nominal amount, and no asbestos lawsuits to date (not including any that may have been settled by AMCOL prior to completion of the acquisition). We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage. The aggregate cost to the Company for the legal defense of these cases since inception continues to be insignificant. The majority of the costs of defense for these cases, excluding cases against AMCOL or American Colloid, are reimbursed by Pfizer Inc. pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. The Company is entitled to indemnification, pursuant to agreement, for sales prior to the initial public offering. Of the 40 pending asbestos cases, 29 of the non-AMCOL cases are subject to indemnification, in whole or in part, because the plaintiffs claim liability based on sales of products that occurred either entirely before the initial public offering, or both before and after the initial public offering. In five of the seven remaining non-AMCOL cases, the plaintiffs have not alleged dates of exposure, and in the remaining two non-AMCOL cases, exposure is alleged to have been after the Company's initial public offering in 1992. The remaining four cases involve AMCOL only, so no Pfizer indemnity is available. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination and assessing site-specific risks. We are awaiting regulators’ approval of the risk assessment report, which will form the basis for a proposal by the Company concerning eventual remediation.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Pursuant to a Consent Decree entered on October 24, 2014, the United States paid the Company $2.3 million in the 4th quarter of 2014 to resolve the Company’s claim for response costs for investigation and initial remediation activities at this facility through October 24, 2014. Contribution by the United States to any future costs of investigation or additional remediation has, by agreement, been left unresolved. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company’s share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2019.

The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection (“DEP”) on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010. The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater. Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2019.

The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

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Segment and Related Information

3 Months Ended

Mar. 31, 2019

Segment and Related Information [Abstract]

Segment and Related Information

Note 16.  Segment and Related Information

On a regular basis, the Company reviews its segments and the approach used by the chief operating decision maker to assess performance and allocate resources. The Company has four reportable segments: Performance Materials, Specialty Minerals, Refractories and Energy Services. See Note 1 to the Condensed Consolidated Financial Statements. Segment information for the three-month periods ended March 31, 2019 and April 1, 2018  is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Net Sales
Performance Materials	$	199.2	$	187.3
Specialty Minerals		144.4		149.6
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3
Income from Operations
Performance Materials	$	26.3	$	26.2
Specialty Minerals		22.0		24.1
Refractories		12.1		12.8
Energy Services		2.4		1.5
Total	$	62.8	$	64.6

A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Income from operations for reportable segments	$	62.8		$	64.6
Acquisition related transaction and integration costs		—			(0.4	)
Unallocated corporate expenses		(0.8	)		(1.6	)
Consolidated income from operations		62.0			62.6
Non-operating deductions, net		(12.8	)		(13.4	)
Income from operations before tax and equity in earnings	$	49.2		$	49.2

The Company's sales by product category are as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

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Basis of Presentation and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Basis of Presentation and Summary of Significant Accounting Policies [Abstract]

Use of Estimates

Use of Estimates

The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, valuation of long-lived assets, goodwill and other intangible assets, income taxes, including valuation allowances, and pension plan assumptions. Actual results could differ from those estimates.

Recently Issued Accounting Standards

Recently Issued Accounting Standards

Changes to accounting principles generally accepted in the United States of America (U.S. GAAP) are established by the Financial Accounting Standards Board (FASB) in the form of accounting standards updates (ASUs) to the FASB’s Accounting Standards Codification. The Company considers the applicability and impact of all ASUs. All recently issued ASUs were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and results of operations.

Recently Adopted Accounting Standards

On January 1, 2019, the Company adopted the provisions of ASU 2016-02, “Leases”, which requires lessees to recognize most leases on-balance sheet. The Company has adopted this new standard under the modified retrospective transition method, using the effective date as our date of initial application. As such, financial information and required disclosures will not be provided for dates prior to January 1, 2019.  The new standard provides a number of optional practical expedients in transition. We have elected the ‘package of practical expedients’, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We have elected the short-term lease recognition exemption for all leases that qualify. On adoption, we recognized additional operating liabilities of $61.4 million with corresponding right-of-use assets of $50.5 million based on the present value of the remaining lease payments under existing operating leases.  As of December 31, 2018, we had $10.9 million in deferred charges related to some of our real estate leases that were recorded against the right of use asset as part of the transition.  The adoption of this standard did not have a material impact on the Company's financial statements.

On January 1, 2019, the Company adopted the provisions of ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act.  As a result, the Company reclassified $10.9 million from "Accumulated other comprehensive loss" to "Retained earnings" on the Condensed Consolidated Balance Sheets as of March 31, 2019.

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Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Components of Lease Cost

Operating lease cost for the quarter ended March 31, 2019 was $4.1 million.  Components of lease cost of are as follows:

(millions of dollars)	Mar. 31, 2019
Operating lease cost	$	4.0
Short-term lease cost	$	0.1

Supplemental Cash Flow Information and Non-cash Activity Related to Operating Leases

Supplemental cash flow information and non-cash activity related to our operating leases are as follows:

(millions of dollars)	Mar. 31, 2019
Operating cash flows information:
Cash paid for amounts included in the measurement of lease liabilities	$	4.0
Non-cash activity:
Right-of-use assets obtained in the exchange for operating lease liabilities	$	0.2

Weighted Average Remaining Lease Term and Discount Rates

Weighted average remaining lease term, and weighted average discount rates related to the Company’s operating leases were as follows:

Weighted-average remaining operating lease term (in years)	7.87
Weighted-average operating leases discount rate	5.0%

Outstanding Lease Assets and Liabilities

The following table summarizes the Company's outstanding lease assets and liabilities and their classification on the Condensed Consolidated Balance Sheet:

(millions of dollars)	Balance Sheet Classification	Mar. 31, 2019
Right-of-use asset	Other assets and deferred charges	$	47.4
Lease liability - current	Other current liabilities		12.3
Lease liability - non-current	Other non-current liabilities		46.1

Future Minimum Lease Payments

Future minimum lease payments under the Company's operating leases as of March 31, 2019 were as follows:

(millions of dollars)	Mar. 31, 2019
For the remainder of 2019	$	11.5
2020		12.3
2021		9.0
2022		7.2
2023		5.9
Thereafter		25.3
Total future minimum lease payments		71.2
Less imputed interest		(13.0	)
Total	$	58.2

Minimum Lease Payments under Non-cancellable Operating Lease

As of December 31, 2018, minimum lease payments under non-cancellable operating leases were expected to be as follows:

(millions of dollars)	Dec. 31, 2018
2019	$	17.3
2020		13.0
2021		9.5
2022		8.2
2023		7.0
Thereafter		24.8
Total	$	79.8

Summary of Rent Expense

A summary of rent expense for the fiscal years ended December 31, 2018 and December 31, 2017 was as follows:

(millions of dollars)	Dec. 31, 2018		Dec. 31, 2017
Rent expense	$	19.5	$	19.3

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contracts with Customers [Abstract]

Disaggregation of Revenue

The following table disaggregates our revenue by major source (product line) for the three-month periods ended March 31, 2019 and April 1, 2018:

(millions of dollars)	Three Months Ended
Net Sales	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Performance Materials		199.2		187.3
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Specialty Minerals		144.4		149.6
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

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Business Combination (Tables)

3 Months Ended

Mar. 31, 2019

Business Combination [Abstract]

Preliminary Purchase Price Allocation for the Sivomatic Acquisition

The following table summarizes the Company’s preliminary purchase price allocation for the Sivomatic acquisition as of March 31, 2019, as compared with the allocation previously reported on the Company's Form 10-K for the year ended December 31, 2018:

(millions of dollars)	Preliminary Allocation Previously Reported on Form 10-K as of December 31, 2018		Increase/ (Decrease)		Allocation as of March 31, 2019
Accounts receivable	$	24.4	$	—	$	24.4
Inventories		15.6		—		15.6
Other current assets		0.6		—		0.6
Mineral rights		39.7		—		39.7
Property, plant and equipment		28.3		—		28.3
Goodwill		35.0		—		35.0
Intangible assets		26.4		—		26.4
Total assets acquired		170.0		—		170.0
Current maturity of long-term debt		5.7		—		5.7
Accounts payable		9.0		—		9.0
Accrued expenses		5.6		—		5.6
Long-term debt		5.3		—		5.3
Non-current deferred tax liability		19.7		—		19.7
Other non-current liabilities		2.2		—		2.2
Total liabilities assumed		47.5		—		47.5
Net assets acquired	$	122.5	$	—	$	122.5

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Earnings per Share (EPS) (Tables)

3 Months Ended

Mar. 31, 2019

Earnings per Share (EPS) [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Three Months Ended
(in millions, except per share data)	Mar. 31, 2019		Apr. 1, 2018
Net income attributable to Minerals Technologies Inc.	$	39.1	$	39.9
Weighted average shares outstanding		35.2		35.4
Dilutive effect of stock options and stock units		0.1		0.3
Weighted average shares outstanding, adjusted		35.3		35.7
Basic earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.13
Diluted earnings per share attributable to Minerals Technologies Inc.	$	1.11	$	1.12

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Restructuring and Other Items, net (Tables)

3 Months Ended

Mar. 31, 2019

Restructuring and Other Items, net [Abstract]

Reconciliation of Restructuring Liability

The following table is a reconciliation of our restructuring liability balance as of March 31, 2019 :

(millions of dollars)
Restructuring liability, December 31, 2018	$	2.5
Cash payments		(0.2	)
Restructuring liability,  March 31, 2019	$	2.3

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Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventories [Abstract]

Inventories by Major Category

The following is a summary of inventories by major category:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Raw materials	$	102.8	$	93.4
Work-in-process		10.2		11.2
Finished goods		97.5		92.2
Packaging and supplies		43.9		42.4
Total inventories	$	254.4	$	239.2

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Other Intangible Assets [Abstract]

Intangible Assets Subject to Amortization

Intangible assets subject to amortization as of March 31, 2019 and December 31, 2018 were as follows:

			Mar. 31, 2019				Dec. 31, 2018
(millions of dollars)	Weighted Average Useful Life (Years)		Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Tradenames		35	$	204.2	$	28.1	$	204.2	$	26.6
Technology		13		18.8		6.8		18.8		6.4
Patents		19		6.4		5.7		6.4		5.6
Customer relationships		22		26.5		3.5		26.5		3.2
		32	$	255.9	$	44.1	$	255.9	$	41.8

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Long-Term Debt and Commitments (Tables)

3 Months Ended

Mar. 31, 2019

Long-Term Debt and Commitments [Abstract]

Long Term Debt

The following is a summary of long-term debt:

(millions of dollars)	Mar. 31, 2019		Dec. 31, 2018
Term Loan Facility-Variable Tranche due February 14, 2024, net of unamortized discount and deferred financing costs of $18.6 million and $19.4 million	$	639.4	$	638.6
Term Loan Facility- Fixed Tranche due May 9, 2021, net of unamortized discount and deferred financing costs of $0.3 million and $0.3 million		247.8		262.6
Netherlands Term Loan due 2020		2.8		3.4
Netherlands Term Loan due 2022		1.2		1.4
Japan Loan Facilities		4.9		5.1
Total		896.1		911.1
Less: Current maturities		2.7		3.3
Total long-term debt	$	893.4	$	907.8

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Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Benefit Plans [Abstract]

Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	1.8		$	2.0
Interest cost		3.5			3.0
Expected return on plan assets		(4.6	)		(4.8	)
Amortization:
Prior service cost		0.1			0.2
Recognized net actuarial loss		2.3			2.7
Net periodic benefit cost	$	3.1		$	3.1

	Other Benefits
	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Service cost	$	—		$	0.1
Interest cost		0.1			0.1
Amortization:
Prior service cost		—			(0.3	)
Recognized net actuarial (gain)		(0.2	)		(0.2	)
Net periodic benefit cost	$	(0.1	)	$	(0.3	)

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Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2019

Comprehensive Income [Abstract]

Reclassifications Out of Accumulated Other Comprehensive Loss

The following table summarizes the amounts reclassified out of accumulated other comprehensive loss attributable to the Company:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Amortization of pension items:
Pre-tax amount	$	2.2		$	2.4
Tax		(0.6	)		(0.5	)
Net of tax	$	1.6		$	1.9

Accumulated Other Comprehensive Loss, Net of Related Tax, Attributable to MTI

The major components of accumulated other comprehensive loss, net of related tax, attributable to MTI are as follows:

(millions of dollars)	Foreign Currency Translation Adjustment			Unrecognized Pension Costs			Net Gain (Loss) on Derivative Instruments			Total
Balance as of December 31, 2018	$	(170.1	)	$	(69.7	)	$	6.1		$	(233.7	)
Other comprehensive loss before reclassifications		(1.0	)		—			1.3			0.3
Amounts reclassified from AOCI		—			1.6			—			1.6
Net current period other comprehensive income (loss)		(1.0	)		1.6			1.3			1.9
Cumulative effect of accounting change		—			(10.4	)		(0.5	)		(10.9	)
Balance as of March 31, 2019	$	(171.1	)	$	(78.5	)	$	6.9		$	(242.7	)

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Accounting for Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2019

Accounting for Asset Retirement Obligations [Abstract]

Reconciliation of Asset Retirement Obligations

The following is a reconciliation of asset retirement obligations as of March 31, 2019:

(millions of dollars)
Asset retirement liability, December 31, 2018	$	23.4
Accretion expense		0.9
Payments		(0.7	)
Asset retirement liability, March 31, 2019	$	23.6

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Segment and Related Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment and Related Information [Abstract]

Segment Information

Segment information for the three-month periods ended March 31, 2019 and April 1, 2018  is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Net Sales
Performance Materials	$	199.2	$	187.3
Specialty Minerals		144.4		149.6
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3
Income from Operations
Performance Materials	$	26.3	$	26.2
Specialty Minerals		22.0		24.1
Refractories		12.1		12.8
Energy Services		2.4		1.5
Total	$	62.8	$	64.6

Reconciliation of Income From Operations Before Provision for Taxes on Income

A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019			Apr. 1, 2018
Income from operations for reportable segments	$	62.8		$	64.6
Acquisition related transaction and integration costs		—			(0.4	)
Unallocated corporate expenses		(0.8	)		(1.6	)
Consolidated income from operations		62.0			62.6
Non-operating deductions, net		(12.8	)		(13.4	)
Income from operations before tax and equity in earnings	$	49.2		$	49.2

Sales by Product Category

The Company's sales by product category are as follows:

	Three Months Ended
(millions of dollars)	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Energy Services		20.3		19.1
Total	$	437.7	$	431.3

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Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Segment	Dec. 31, 2018 USD ($)
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Number of reportable segments | Segment	4
Recently Adopted Accounting Standards [Abstract]
Operating liabilities	$ 58.2
Right-of-use assets	47.4
ASU 2016-02 [Member]
Recently Adopted Accounting Standards [Abstract]
Operating liabilities		$ 61.4
Right-of-use assets		50.5
Deferred charges		10.9
ASU 2018-02 [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income		0.0
ASU 2018-02 [Member] | Retained Earnings [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income	10.9	10.9
ASU 2018-02 [Member] | Accumulated Other Comprehensive Loss [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income	$ (10.9)	$ (10.9)

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Leases (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Leases [Abstract]
Operating lease cost	$ 4.1
Operating Lease Cost [Abstract]
Operating lease cost	4.0
Short-term lease cost	0.1
Operating cash flows information [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	4.0
Non-cash activity [Abstract]
Right-of-use assets obtained in the exchange for operating lease liabilities	$ 0.2
Weighted Average Remaining Lease Term and Discount Rates [Abstract]
Weighted-average remaining operating lease term	7 years 10 months 13 days
Weighted-average operating leases discount rate	5.00%
Outstanding Lease Assets and Liabilities [Abstract]
Right-of-use asset	$ 47.4
Lease liability - current	12.3
Lease liability - non-current	46.1
Future Minimum Lease Payments [Abstract]
For the remainder of 2019	11.5
2020	12.3
2021	9.0
2022	7.2
2023	5.9
Thereafter	25.3
Total future minimum lease payments	71.2
Less imputed interest	(13.0)
Total	$ 58.2
Minimum Lease Payments under Non-cancellable Operating Leases [Abstract]
2019		$ 17.3
2020		13.0
2021		9.5
2022		8.2
2023		7.0
Thereafter		24.8
Total		79.8
Rent Expense [Abstract]
Rent expense		$ 19.5	$ 19.3
Minimum [Member]
Operating Leases [Abstract]
Remaining lease terms	1 year
Maximum [Member]
Operating Leases [Abstract]
Remaining lease terms	50 years

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Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Abstract]
Total net sales	$ 437.7	$ 431.3
Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Total net sales	73.2	79.2
Household, Personal Care & Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	74.9	48.7
Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	15.9	12.7
Building Materials [Member]
Disaggregation of Revenue [Abstract]
Total net sales	15.3	18.9
Basic Minerals [Member]
Disaggregation of Revenue [Abstract]
Total net sales	19.9	27.8
Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Total net sales	91.5	97.0
Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Total net sales	18.1	17.0
Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Total net sales	22.3	22.5
Talc [Member]
Disaggregation of Revenue [Abstract]
Total net sales	12.5	13.1
Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	62.0	62.3
Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	11.8	13.0
Performance Materials [Member]
Disaggregation of Revenue [Abstract]
Total net sales	199.2	187.3
Performance Materials [Member] | Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Total net sales	73.2	79.2
Performance Materials [Member] | Household, Personal Care & Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	74.9	48.7
Performance Materials [Member] | Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	15.9	12.7
Performance Materials [Member] | Building Materials [Member]
Disaggregation of Revenue [Abstract]
Total net sales	15.3	18.9
Performance Materials [Member] | Basic Minerals [Member]
Disaggregation of Revenue [Abstract]
Total net sales	19.9	27.8
Specialty Minerals [Member]
Disaggregation of Revenue [Abstract]
Total net sales	144.4	149.6
Specialty Minerals [Member] | Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Total net sales	91.5	97.0
Specialty Minerals [Member] | Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Total net sales	18.1	17.0
Specialty Minerals [Member] | Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Total net sales	22.3	22.5
Specialty Minerals [Member] | Talc [Member]
Disaggregation of Revenue [Abstract]
Total net sales	12.5	13.1
Refractories [Member]
Disaggregation of Revenue [Abstract]
Total net sales	73.8	75.3
Refractories [Member] | Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	62.0	62.3
Refractories [Member] | Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Total net sales	11.8	13.0
Energy Services [Member]
Disaggregation of Revenue [Abstract]
Total net sales	$ 20.3	$ 19.1

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Business Combination (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Dec. 31, 2018
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 812.4	[1]	$ 812.4	[2]
Sivomatic [Member]
Business Combination [Abstract]
Total consideration transferred, net of cash acquired	122.5
Additional deferred tax liability	18.8
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable	24.4
Inventories	15.6
Other current assets	0.6
Mineral rights	39.7
Property, plant and equipment	28.3
Goodwill	35.0
Intangible assets	26.4
Total assets acquired	170.0
Current maturity of long term debt	5.7
Accounts payable	9.0
Accrued expenses	5.6
Long term debt	5.3
Non-current deferred tax liability	19.7
Other non-current liabilities	2.2
Total liabilities assumed	47.5
Net assets acquired	122.5
Sivomatic [Member] | Previously Reported [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable			24.4
Inventories			15.6
Other current assets			0.6
Mineral rights			39.7
Property, plant and equipment			28.3
Goodwill			35.0
Intangible assets			26.4
Total assets acquired			170.0
Current maturity of long term debt			5.7
Accounts payable			9.0
Accrued expenses			5.6
Long term debt			5.3
Non-current deferred tax liability			19.7
Other non-current liabilities			2.2
Total liabilities assumed			47.5
Net assets acquired			$ 122.5
Sivomatic [Member] | Increase/(Decrease) [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable	0.0
Inventories	0.0
Other current assets	0.0
Mineral rights	0.0
Property, plant and equipment	0.0
Goodwill	0.0
Intangible assets	0.0
Total assets acquired	0.0
Current maturity of long term debt	0.0
Accounts payable	0.0
Accrued expenses	0.0
Long term debt	0.0
Non-current deferred tax liability	0.0
Other non-current liabilities	0.0
Total liabilities assumed	0.0
Net assets acquired	$ 0.0
Sivomatic [Member] | Trade Names [Member]
Business Combination [Abstract]
Estimated useful life of intangible assets acquired	20 years
Sivomatic [Member] | Customer Relationships [Member]
Business Combination [Abstract]
Estimated useful life of intangible assets acquired	20 years

[1] Unaudited

[2] Condensed from audited financial statements

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Earnings per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Earnings per Share (EPS) [Abstract]
Net income attributable to Minerals Technologies Inc.	$ 39.1	$ 39.9
Weighted average shares outstanding (in shares)	35,200,000	35,400,000
Dilutive effect of stock options and stock units (in shares)	100,000	300,000
Weighted average shares outstanding, adjusted (in shares)	35,300,000	35,700,000
Basic earnings per share attributable to Minerals Technologies Inc. (in dollars per share)	$ 1.11	$ 1.13
Diluted earnings per share attributable to Minerals Technologies Inc. (in dollars per share)	$ 1.11	$ 1.12
Stock Options [Member]
Antidilutive Securities Excluded from Earnings Per Share Calculation [Abstract]
Anti-dilutive securities not included in the weighted average commons shares outstanding calculation (in shares)	748,754	362,443

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Restructuring and Other Items, net (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period	$ 2.5
Cash payments	(0.2)
Restructuring liability, ending of period	$ 2.3

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Taxes [Abstract]
Provision for taxes on income	$ 9.3	$ 9.3
Effective income tax rate	18.90%	18.90%
Amount of unrecognized tax benefits	$ 17.0
Unrecognized tax benefits that would impact effective tax rate	13.3
Unrecognized tax benefits, net increase in penalties and interest expenses	0.3
Unrecognized tax benefits, accrued interest and penalties	$ 2.9	$ 1.8

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Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019		Dec. 31, 2018
Inventories [Abstract]
Raw materials	$ 102.8		$ 93.4
Work-in-process	10.2		11.2
Finished goods	97.5		92.2
Packaging and supplies	43.9		42.4
Total inventories	$ 254.4	[1]	$ 239.2	[2]

[1] Unaudited

[2] Condensed from audited financial statements

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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Dec. 31, 2018
Goodwill and Other Intangible Assets [Abstract]
Goodwill	$ 812.4	[1]	$ 812.4	[2]
Finite-Lived Intangible Assets [Abstract]
Weighted average useful life	32 years
Gross carrying amount	$ 255.9		255.9
Accumulated amortization	$ 44.1		41.8
Tradenames [Member]
Finite-Lived Intangible Assets [Abstract]
Weighted average useful life	35 years
Gross carrying amount	$ 204.2		204.2
Accumulated amortization	$ 28.1		26.6
Technology [Member]
Finite-Lived Intangible Assets [Abstract]
Weighted average useful life	13 years
Gross carrying amount	$ 18.8		18.8
Accumulated amortization	$ 6.8		6.4
Patents [Member]
Finite-Lived Intangible Assets [Abstract]
Weighted average useful life	19 years
Gross carrying amount	$ 6.4		6.4
Accumulated amortization	$ 5.7		5.6
Customer Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Weighted average useful life	22 years
Gross carrying amount	$ 26.5		26.5
Accumulated amortization	$ 3.5		$ 3.2

[1] Unaudited

[2] Condensed from audited financial statements

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Goodwill and Other Intangible Assets, Amortization (Details) - Acquired Finite-Lived Intangible Assets [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Amortization Expense, Fiscal Year Maturity [Abstract]
Weighted average amortization period for intangible assets subject to amortization	32 years
Estimated amortization expense, remainder of 2019	$ 7.0
Estimated amortization expense, 2020	36.7
Estimated amortization expense, 2021	36.7
Estimated amortization expense, 2022	36.7
Estimated amortization expense, 2023	36.7
Estimated amortization expense, thereafter	$ 168.1

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Derivative Financial Instruments (Details) - Cash Flow Hedges [Member] - USD ($) $ in Millions	Mar. 31, 2019	Jul. 01, 2018	Jul. 03, 2016
Interest Rate Swaps [Member]
Derivative, Fair Value [Abstract]
Notional amount	$ 150.0	$ 150.0
Interest Rate Swaps [Member] | Other Non-current Liabilities [Member]
Derivative, Fair Value [Abstract]
Fair value of derivative liability	4.1
Interest Rate Swaps [Member] | Other Assets and Deferred Charges [Member]
Derivative, Fair Value [Abstract]
Fair value of derivative assets	1.9
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Abstract]
Notional amount	129.0		$ 300.0
Cross Currency Rate Swap [Member]
Derivative, Fair Value [Abstract]
Notional amount	150.0	$ 150.0
Cross Currency Rate Swap [Member] | Other Assets and Deferred Charges [Member]
Derivative, Fair Value [Abstract]
Fair value of derivative assets	$ 7.9

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Long-Term Debt and Commitments (Details) $ in Millions		3 Months Ended			12 Months Ended
	Feb. 14, 2017 USD ($)	Mar. 31, 2019 USD ($) Loan		Apr. 01, 2018 USD ($)	Dec. 31, 2018 USD ($)		Jun. 23, 2015 USD ($)	May 09, 2014 USD ($)
Debt Instruments [Abstract]
Debt		$ 896.1			$ 911.1
Less: Current maturities		2.7	[1]		3.3	[2]
Total long-term debt		893.4	[1]		907.8	[2]
Repayment of long-term debt		$ (15.8)		$ (0.4)
Minimum [Member]
Debt Instruments [Abstract]
Net leverage ratio		3.50
Maximum [Member]
Debt Instruments [Abstract]
Net leverage ratio		5.25
Sivomatic [Member]
Debt Instruments [Abstract]
Repayment of long-term debt		$ (0.7)
Acquisition related long-term debt assumed at fair value		$ 10.7
Number of term loans | Loan		2
Euribor [Member] | Sivomatic [Member]
Debt Instruments [Abstract]
Basis spread on variable rate		2.00%
Term Loan Facility [Member]
Debt Instruments [Abstract]
Maximum borrowing capacity								$ 1,560.0
Line of credit outstanding							$ 1,378.0
Repayment of long-term debt		$ (15.0)
Term Loan Facility [Member] | Floating Rate Tranche [Member]
Debt Instruments [Abstract]
Line of credit outstanding	$ 788.0						1,078.0
Interest rate		0.75%
Basis spread on variable rate	0.75%	2.25%
Debt issue discount		0.25%
Required annual amortization		1.00%
Term Loan Facility [Member] | Fixed Rate Tranche [Member]
Debt Instruments [Abstract]
Line of credit outstanding							$ 300.0
Interest rate		4.75%
Debt issue discount		0.25%
Term Loan Facility, Due February 14, 2024 [Member]
Debt Instruments [Abstract]
Debt		$ 639.4			638.6
Long-term debt, unamortized discount and deferred financing costs		$ 18.6			19.4
Maturity date		Feb. 14, 2024
Term Loan Facility Due May 9, 2021 [Member]
Debt Instruments [Abstract]
Debt		$ 247.8			262.6
Long-term debt, unamortized discount and deferred financing costs		$ 0.3			0.3
Maturity date		May 09, 2021
Netherlands Term Loan Due 2020 [Member]
Debt Instruments [Abstract]
Debt		$ 2.8			3.4
Maturity date		Dec. 31, 2020
Netherlands Term Loan Due 2022 [Member]
Debt Instruments [Abstract]
Debt		$ 1.2			1.4
Maturity date		Dec. 31, 2022
Japan Loan Facilities [Member]
Debt Instruments [Abstract]
Debt		$ 4.9			5.1
Repayment of long-term debt		$ (0.2)
Revolving Credit Facility [Member]
Debt Instruments [Abstract]
Maturity date		Apr. 18, 2023
Maximum borrowing capacity		$ 300.0						$ 200.0
Line of credit outstanding		$ 100.0
Basis spread on variable rate		0.25%
Revolving Credit Facility [Member] | Sivomatic [Member]
Debt Instruments [Abstract]
Proceeds from issuance of short-term debt					$ 113.0
Revolving Credit Facility [Member] | LIBOR [Member]
Debt Instruments [Abstract]
Basis spread on variable rate		1.625%
Letter of Credit [Member]
Debt Instruments [Abstract]
Maximum borrowing capacity		$ 15.0
Letters of credit outstanding		10.2
Short-Term Bank Credit Lines [Member]
Debt Instruments [Abstract]
Maximum borrowing capacity		43.2
Line of credit outstanding		$ 4.7

[1] Unaudited

[2] Condensed from audited financial statements

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Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Benefit Plans [Abstract]
Maximum percentage of total benefit obligation for international pension plans	25.00%
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 1.8	$ 2.0
Interest cost	3.5	3.0
Expected return on plan assets	(4.6)	(4.8)
Amortization [Abstract]
Prior service cost	0.1	0.2
Recognized net actuarial (gain) loss	2.3	2.7
Net periodic benefit cost	3.1	3.1
Employer Contributions [Abstract]
Expected employer contribution to its benefit plans	9.7
Employer contribution to benefit plans	1.4
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0.0	0.1
Interest cost	0.1	0.1
Amortization [Abstract]
Prior service cost	0.0	(0.3)
Recognized net actuarial (gain) loss	(0.2)	(0.2)
Net periodic benefit cost	(0.1)	$ (0.3)
Employer Contributions [Abstract]
Expected employer contribution to its benefit plans	0.3
Employer contribution to benefit plans	$ 0.0

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Comprehensive Income, Reclassification Out of Accumulated Other Comprehensive Loss (Details) - Pension Costs [Member] - Reclassification out of Accumulated Other Comprehensive Loss [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Amortization of pension items [Abstract]
Pre-tax amount	$ 2.2	$ 2.4
Tax	(0.6)	(0.5)
Net of tax	$ 1.6	$ 1.9

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Comprehensive Income, Accumulated Other Comprehensive Loss, Net of Related Tax (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Apr. 01, 2018	Dec. 31, 2018
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance at beginning of period	[1]	$ 1,353.5
Total other comprehensive income, net of tax		2.4	$ 18.7
Balance at end of period	[2]	1,393.5
ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change				$ 0.0
Retained Earnings [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Total other comprehensive income, net of tax		0.0	0.0
Retained Earnings [Member] | ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change		10.9		10.9
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance at beginning of period		(233.7)
Other comprehensive loss before reclassifications		0.3
Amounts reclassified from AOCI		1.6
Total other comprehensive income, net of tax		1.9	$ 18.2
Balance at end of period		(242.7)
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change		(10.9)		$ (10.9)
Foreign Currency Translation Adjustment [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance at beginning of period		(170.1)
Other comprehensive loss before reclassifications		(1.0)
Amounts reclassified from AOCI		0.0
Total other comprehensive income, net of tax		(1.0)
Balance at end of period		(171.1)
Foreign Currency Translation Adjustment [Member] | ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change		0.0
Unrecognized Pension Costs [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance at beginning of period		(69.7)
Other comprehensive loss before reclassifications		0.0
Amounts reclassified from AOCI		1.6
Total other comprehensive income, net of tax		1.6
Balance at end of period		(78.5)
Unrecognized Pension Costs [Member] | ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change		(10.4)
Net Gain (Loss) on Derivative Instruments [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance at beginning of period		6.1
Other comprehensive loss before reclassifications		1.3
Amounts reclassified from AOCI		0.0
Total other comprehensive income, net of tax		1.3
Balance at end of period		6.9
Net Gain (Loss) on Derivative Instruments [Member] | ASU 2018-02 [Member]
Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Cumulative effect of accounting change		$ (0.5)

[1] Condensed from audited financial statements

[2] Unaudited

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Accounting for Asset Retirement Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Asset retirement obligation [Roll Forward]
Asset retirement liability, beginning of period	$ 23.4
Accretion expense	0.9
Payments	(0.7)
Asset retirement liability, ending of period	23.6
Asset Retirement Obligation [Abstract]
Asset retirement obligation current portion	0.4
Asset retirement obligation noncurrent portion	$ 23.2

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Contingencies (Details) $ in Millions	1 Months Ended	3 Months Ended
	May 03, 2019 Case	Mar. 31, 2019 USD ($) Case	Oct. 24, 2014 USD ($)
Site Contingency [Abstract]
Consent decree paid by US government | $			$ 2.3
Silica Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of pending cases		3
Cumulative number of cases dismissed		1,493
Number of cases dismissed		0
Number of lawsuits settled		1
Asbestos Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of pending cases		40
Cumulative number of cases dismissed		57
Number of new cases filed		7
Number of cases dismissed		0
Number of lawsuits settled		0
Number of cases claim liability		29
Number of cases with no alleged exposure date		5
Number of allege liability		7
Asbestos Cases [Member] | Subsequent Event [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of new cases filed	3
Asbestos Cases [Member] | AMCOL International Corporation [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of allege liability		4
Asbestos Cases [Member] | Non-AMCOL International Corporation [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of allege liability		2
Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Abstract]
Location of plant		Canaan, Connecticut
Estimated accrued remediation cost | $		$ 0.4
Administrative Consent Order for Installation of Groundwater Contamination System [Member]
Site Contingency [Abstract]
Location of plant		Adams, Massachusetts
Estimated accrued remediation cost | $		$ 0.4
Estimated cost of wastewater treatment upgrades, lower range | $		6.0
Estimated cost of wastewater treatment upgrades, upper range | $		$ 8.0

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Segment and Related Information, Reportable Segments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Segment	Apr. 01, 2018 USD ($)
Segment Reporting Information [Abstract]
Number of reportable segments | Segment	4
Net sales	$ 437.7	$ 431.3
Income from operations	62.0	62.6
Performance Materials [Member]
Segment Reporting Information [Abstract]
Net sales	199.2	187.3
Specialty Minerals [Member]
Segment Reporting Information [Abstract]
Net sales	144.4	149.6
Refractories [Member]
Segment Reporting Information [Abstract]
Net sales	73.8	75.3
Energy Services [Member]
Segment Reporting Information [Abstract]
Net sales	20.3	19.1
Reportable Segments [Member]
Segment Reporting Information [Abstract]
Net sales	437.7	431.3
Income from operations	62.8	64.6
Reportable Segments [Member] | Performance Materials [Member]
Segment Reporting Information [Abstract]
Net sales	199.2	187.3
Income from operations	26.3	26.2
Reportable Segments [Member] | Specialty Minerals [Member]
Segment Reporting Information [Abstract]
Net sales	144.4	149.6
Income from operations	22.0	24.1
Reportable Segments [Member] | Refractories [Member]
Segment Reporting Information [Abstract]
Net sales	73.8	75.3
Income from operations	12.1	12.8
Reportable Segments [Member] | Energy Services [Member]
Segment Reporting Information [Abstract]
Net sales	20.3	19.1
Income from operations	$ 2.4	$ 1.5

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Segment and Related Information, Reconciliation of Operating Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income from operations before provision (benefit) for taxes on income [Abstract]
Acquisition related transaction and integration costs	$ 0.0	$ (0.4)
Unallocated corporate expenses	(0.8)	(1.6)
Consolidated income from operations	62.0	62.6
Non-operating deductions, net	(12.8)	(13.4)
Income from operations before tax and equity in earnings	49.2	49.2
Reportable Segments [Member]
Income from operations before provision (benefit) for taxes on income [Abstract]
Consolidated income from operations	$ 62.8	$ 64.6

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Segment and Related Information, Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Revenue from External Customer [Abstract]
Net sales	$ 437.7	$ 431.3
Metalcasting [Member]
Revenue from External Customer [Abstract]
Net sales	73.2	79.2
Household, Personal Care and Specialty Products [Member]
Revenue from External Customer [Abstract]
Net sales	74.9	48.7
Environmental Products [Member]
Revenue from External Customer [Abstract]
Net sales	15.9	12.7
Building Materials [Member]
Revenue from External Customer [Abstract]
Net sales	15.3	18.9
Basic Minerals [Member]
Revenue from External Customer [Abstract]
Net sales	19.9	27.8
Paper PCC [Member]
Revenue from External Customer [Abstract]
Net sales	91.5	97.0
Specialty PCC [Member]
Revenue from External Customer [Abstract]
Net sales	18.1	17.0
Ground Calcium Carbonate [Member]
Revenue from External Customer [Abstract]
Net sales	22.3	22.5
Talc [Member]
Revenue from External Customer [Abstract]
Net sales	12.5	13.1
Refractory Products [Member]
Revenue from External Customer [Abstract]
Net sales	62.0	62.3
Metallurgical Products [Member]
Revenue from External Customer [Abstract]
Net sales	11.8	13.0
Energy Services [Member]
Revenue from External Customer [Abstract]
Net sales	$ 20.3	$ 19.1