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    • 1. 发明授权
    • Thermoplastic polyester molding materials having low temperature impact
strength
    • 具有低温冲击强度的热塑性聚酯成型材料
    • US4912163A
    • 1990-03-27
    • US390290
    • 1989-08-07
    • Dietrich LausbergJuergen VietmeierGraham E. McKeeHans-Georg BraunPeter Hildenbrand
    • Dietrich LausbergJuergen VietmeierGraham E. McKeeHans-Georg BraunPeter Hildenbrand
    • C08L23/08C08L51/00C08L51/04C08L51/06C08L67/00C08L67/02C08L69/00
    • C08L67/02C08L69/00
    • Thermoplastic polyester molding materials essentially contain(A) from 20 to 89% by weight of one or more aliphatic polyesters of an aromatic dicarboxylic acid,(B) from 10 to 79% by weight of one or more aromatic polycarbonates and(C) from 1 to 40% by weight of an elastomer or of a mixture of elastomers consisting ofCA from 5 to 100% by weight of an elastomeric graft polymer composed ofCA1 not less than 50% by weight of a grafting base having a glass transition temperature T.sub.g of less than -20.degree. C.,CA2 from 5 to 20% by weight of a first graft shell consisting of a mixture of a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid and a vinylaromatic in a weight ratio of from 5:95 to 70:30 andCA3 from 10 to 30% by weight of a second graft shell consisting of one or more polymers having a glass transition temperature T.sub.g above 20.degree. C. andCB from 0 to 95% by weight of an ethylene copolymer composed of CB1 from 40 to 99% by weight of ethylene and CB2 from 1 to 60% by weight of one or more comonomers containing carboxyl groups and/or carboxyl group derivatives,the sum of A to C, CA and CB, CA1 to CA3 and of CB1 and CB2 being 100% by weight in each case.
    • 热塑性聚酯成型材料基本上含有(A)20至89重量%的一种或多种芳族二羧酸的脂族聚酯,(B)10至79重量%的一种或多种芳族聚碳酸酯和(C)1 至40重量%的弹性体或由CA组成的弹性体的混合物,其由5至100重量%的弹性体接枝聚合物组成,弹性体接枝聚合物由CA1组成,不小于50重量%的玻璃化转变温度Tg为 小于-20℃,CA2为5至20重量%的由丙烯酸的C1-C8烷基酯和乙烯基芳族化合物的混合物组成的第一接枝壳,其重量比为5:95至70 :30和CA3为10至30重量%的由玻璃化转变温度Tg高于20℃的一种或多种聚合物组成的第二接枝壳,CB为0至95重量%的由CB1组成的乙烯共聚物 40至99重量%的乙烯和CB 2为1至60重量%的一种或多种共聚单体 含有羧基和/或羧基衍生物时,A〜C,CA和CB,CA1〜CA3和CB1和CB2的总和在每种情况下为100重量%。