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1. 发明授权

US5247025A Multistage graft copolymer and its use for the preparation of transparent PVC molding materials 失效
标题翻译：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。

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