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    Multistage graft copolymer and its use for the preparation of transparent PVC molding materials
    1.
    发明授权
    Multistage graft copolymer and its use for the preparation of transparent PVC molding materials 失效
    多层共聚物及其制备透明PVC模塑材料的用途

    公开(公告)号：US5247025A

    公开(公告)日：1993-09-21

    申请号：US844316

    申请日：1992-03-02

    申请人： Hans-Helmut Goertz ,  Guenter Hatzmann ,  Werner Oschmann

    发明人： Hans-Helmut Goertz ,  Guenter Hatzmann ,  Werner Oschmann

    IPC分类号： C08F2/22 ,  C08F285/00 ,  C08L51/00

    CPC分类号： C08L51/00 ,  C08F285/00 ,  Y10S525/902

    摘要： Graft copolymers obtained byA) emulsion polymerization of from 5 to 35% by weight of a monomer mixture ofa.sub.1) 60-80% by weight of one or more vinylaromatic monomers,a.sub.2) 20-40% by weight of one or more ethylenically unsaturated nitriles,B) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage A), of 20-45% by weight of a monomer mixture ofb.sub.1) 50-75% by weight of one or more vinylaromatic monomers,b.sub.2) 25-50% by weight of one or more C.sub.1 -C.sub.18 -alkyl acrylates,C) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage B), of 5-35% by weight of a monomer mixture ofc.sub.1) 60-80% by weight of one or more vinylaromatic monomers,c.sub.2) 20-40% by weight of one or more ethylenically unsaturated nitriles,D) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage C), of 15-45% by weight of a monomer mixture ofd.sub.1) 80-99.9% by weight of one or more C.sub.1 -C.sub.18 -alkyl acrylates,d.sub.2) 0.1-0% by weight of one or more di- or polyethylenically unsaturated monomers.The graft copolymers can be used for the preparation of transparent PVC molding materials.

    摘要翻译： 通过A）乳液聚合获得的接枝共聚物，其通过5重量％至35重量％的a1）60-80重量％的一种或多种乙烯基芳族单体的混合物，a2）20-40重量％的一种或多种烯属不饱和单体 腈）B）在步骤A）中得到的乳液聚合物存在下，随后的乳液聚合为20-45重量％的b1）50-75重量％的一种或多种乙烯基芳族单体的单体混合物，b2） 25-50重量％的一种或多种丙烯酸C 1 -C 18烷基酯，C）在步骤B）中获得的乳液聚合物存在下，随后的乳液聚合为5-35重量％的单体混合物c1） 60-80重量％的一种或多种乙烯基芳族单体，c2）20-40重量％的一种或多种烯键式不饱和腈，D）在步骤C）中获得的乳液聚合物存在下的随后乳液聚合为15 -45重量％的d1）80-99.9重量％的一种或多种C1-C18烷基丙烯酸酯的单体混合物，d2）0.1-0％ 一种或多种二烯或多烯属不饱和单体的重量。 接枝共聚物可用于制备透明PVC成型材料。