-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 1eH+iwc+74a4tMdhMuFe+A==

<SEC-DOCUMENT>0001127602-11-001321.txt : 20110110
<SEC-HEADER>0001127602-11-001321.hdr.sgml : 20110110
<ACCEPTANCE-DATETIME>20110110141912
ACCESSION NUMBER:		0001127602-11-001321
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110107
FILED AS OF DATE:		20110110
DATE AS OF CHANGE:		20110110

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Tremblay Stephen E.
		CENTRAL INDEX KEY:			0001478571

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34581
		FILM NUMBER:		11519821

	MAIL ADDRESS:	
		STREET 1:		14 VIOLETTA COURT
		CITY:			THE WOODLANDS
		STATE:			TX
		ZIP:			77381

	FORMER NAME:	
		FORMER CONFORMED NAME:	Tremblay Stephen G.
		DATE OF NAME CHANGE:	20091211

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Kraton Performance Polymers, Inc.
		CENTRAL INDEX KEY:			0001321646
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS, MATERIALS, SYNTH RESINS & NONVULCAN ELASTOMERS [2821]
		IRS NUMBER:				200411521
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		15710 JOHN F. KENNEDY BLVD.
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77032
		BUSINESS PHONE:		800 457-2866

	MAIL ADDRESS:	
		STREET 1:		15710 JOHN F. KENNEDY BLVD.
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77032

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Polymer Holdings LLC
		DATE OF NAME CHANGE:	20050324
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-01-07</periodOfReport>

    <issuer>
        <issuerCik>0001321646</issuerCik>
        <issuerName>Kraton Performance Polymers, Inc.</issuerName>
        <issuerTradingSymbol>KRA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001478571</rptOwnerCik>
            <rptOwnerName>Tremblay Stephen E.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KRATON PERFORMANCE POLYMERS</rptOwnerStreet1>
            <rptOwnerStreet2>15710 JOHN F. KENNEDY BLVD, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77032</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>CFO and Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-01-07</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>24527</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.512</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>39329</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-01-07</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>24527</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>31.8196</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14802</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Options (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>13.512</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2011-01-07</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>24527</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-06-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>24527</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>62619</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Transacted under a 10b5-1 plan that was adopted on November 9, 2010.</footnote>
        <footnote id="F2">The price in column 4 is a weighted average. The prices actually received ranged from $31.69 to $32.31. For all transactions reported in this Form 4 utilizing a weighted average price, the reporting person undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range.</footnote>
        <footnote id="F3">3,413 of the options reported herein have vested and are immediately exercisable.  The remaining 59,206 options will vest on June 19, 2011, subject to Stephen E. Tremblay (the &quot;Reporting Person&quot;) being employed by the company or its affiliates or subsidiaries on the vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Stephen W. Duffy As Attorney-in-Fact for Stephen E. Tremblay</signatureName>
        <signatureDate>2011-01-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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