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    BLENDS OF STYRENE-BUTADIENE COPOLYMERS
    2.
    发明申请
    BLENDS OF STYRENE-BUTADIENE COPOLYMERS 审中-公开

    公开(公告)号：US20170240740A1

    公开(公告)日：2017-08-24

    申请号：US15508355

    申请日：2015-09-02

    Applicant: INEOS STYROLUTION GROUP GMBH

    Inventor： Michael HAMILTON ,  Thomas W. COCHRAN ,  Norbert NIESSNER ,  Konrad KNOLL

    IPC: C08L53/02 ,  C08J5/18

    CPC classification number: C08L53/02 ,  C08J5/18 ,  C08J2353/02 ,  C08J2425/06 ,  C08J2453/02 ,  C08L2201/10 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2205/035 ,  C08L25/06

    Abstract: Polymer blend comprising 95 to 100% of a component A) and 0 to 5% of additives, where A) is consisting of polymers A1 ) to A4): A1 ) 50 to 75% of a star shaped block copolymer A1 which comprises at least 2 terminal vinylaromatic hard blocks S and diene soft blocks B, where the proportion of the hard blocks S is from 65 to 90%, and Mn of block S is 35000 to 200000; A2) 5 to 15% of block copolymer A2 which comprises 2 terminal vinylaromatic hard blocks S1 and S2 and random copolymer blocks (B/S) consisting of 20 to 60% vinylaromatic monomers, and 80 to 40% dienes where the proportion of blocks S1 and S2 is 40 to 60%; and Mn of blocks S1 is 35000 to 200000, and Mn of blocks S2 is 5000 to 30000 and the molar S1/S2 ratio is 1:0.5 to 1:10; A3) 3 to 10% of an block copolymer A3 built up from vinylaromatic hard blocks S and from random soft blocks B/S consisting of 60 to 30% vinylaromatic monomers and 40 to 70% dienes, where the diene content is less than 50% and the proportion of the soft phase is at least 60%; and A4) 10 to 35% polystyrene A4; whereby the ratio of A1 ) to A2) to A3) is from 7 : [1.2 to 1.9] : [0.5 to 12], have particular mechanical properties.

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