BLENDS OF STYRENE-BUTADIENE COPOLYMERS
    84.
    发明申请

    公开(公告)号:US20170240740A1

    公开(公告)日:2017-08-24

    申请号:US15508355

    申请日:2015-09-02

    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.

    THERMOPLASTIC MOULDING COMPOSITIONS WITH APPROPRIATELY DESIGNED GRAFT SHELL
    88.
    发明申请
    THERMOPLASTIC MOULDING COMPOSITIONS WITH APPROPRIATELY DESIGNED GRAFT SHELL 审中-公开
    具有适当设计格子壳的热塑性成型组合物

    公开(公告)号:US20160297957A1

    公开(公告)日:2016-10-13

    申请号:US15038510

    申请日:2014-11-19

    Abstract: Thermoplastic moulding compositions containing: from 55 to 85% by weight of a copolymer A composed of styrene and acrylonitrile, from 10 to 40% by weight of at least one graft copolymer B composed of B1: from 50 to 80% by weight, preferably from 60 to 70% by weight, of crosslinked acrylate polymer B1 with average particle diameter from 300 to 700 nm as graft base B1, B2: a first graft shell B2 made of from 5 to 30 of a vinylaromatic monomer B21, and B3: a second graft shell B3 made of from 15 to 40 of a mixture of vinylaromatic monomers B31 and nitrile monomers B32, where these are present in a ratio by weight of from 4:1 to 3:2, and from 0 to 5% by weight of additives and/or auxiliaries C, have particular mechanical properties when the content of acrylonitrile in the copolymer component A and the content of acrylonitrile in the graft shell B3 differ by at least 8% by weight.

    Abstract translation: 含有55〜85重量%的由苯乙烯和丙烯腈组成的共聚物A,10〜40重量%的由B1组成的至少一种接枝共聚物B:50〜80重量%,优选为 60〜70重量%的平均粒径为300〜700nm的交联丙烯酸酯聚合物B1作为接枝基B1,B2:由5-30的乙烯基芳族单体B21制成的第一接枝壳B2,B3:第二 由15至40个乙烯基芳族单体B31和腈单体B32的混合物制成的接枝壳B3,其中它们以4:1至3:2的重量比和0至5重量%的添加剂 和/或助剂C在共聚物组分A中的丙烯腈含量和接枝壳B3中的丙烯腈含量相差至少为8重量%时具有特定的机械性能。

    HIGH CLARITY AND DUCTILE MOLDING COMPOSITION COMPRISING A SMMA COPOLYMER, A SBC-BLOCK COPOLYMER AND AT LEAST ONE LIGHT STABILIZER

    公开(公告)号:US20250136802A1

    公开(公告)日:2025-05-01

    申请号:US18835787

    申请日:2023-02-13

    Abstract: High clarity and ductile molding composition comprising: (a) 71 to 98.99 wt.-% of at least one random copolymer (a) made from 44 to 64 wt.-% of at least one vinylaromatic monomer (a11), and 36 to 56 wt.-%, methyl methacrylate (a12); (b) 1 to 28.99 wt.-% of at least one vinylaromatic-diene block copolymer (b) which comprises at least one hard blocks S made from vinylaromatic monomers and at least one soft block B made from dienes, and/or at least one soft block B/S made from dienes and vinylaromatic monomers; where the proportion of diene-based on entire block copolymer (b) is 47 to 67 wt.-%; (c) 0.01 to 1.0 wt.-% of at least one light stabilizer (c); (d) 0 to 1.0 wt.-% of at least one antioxidant (d); and (e) 0 to 5 wt.-% of one or more additive(s) and/or processing aid(s) (e), different from the light stabilizer(s) (c) and antioxidant(s) (d); have good light stability and processability.

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