公开(公告)号：EP0557124A1

公开(公告)日：1993-08-25

申请号：EP93301237.9

申请日：1993-02-19

申请人： MITSUBISHI CHEMICAL CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Nishio, Takeyoshi ,  Nomura, Takao ,  Sato, Hiroki, c/o Mitsubishi Petrochem. Co. Ltd. ,  Tsutsumi, Ikuo, c/o Mitsubishi Petrochem. Co. Ltd. ,  Sakurai, Hideo, c/o Mitsubishi Petrochem. Co. Ltd. ,  Sano, Hironari, c/o Mitsubishi Petrochem. Co. Ltd.

IPC分类号： C08L53/00 ,  C08L51/06

CPC分类号： C08K3/34 ,  C08L51/006 ,  C08L53/00 ,  C08L2666/04

摘要： A thermoplastic polymer composition comprising:

(i) 100 parts by weight of a thermoplastic polymer component consisting of 55 to 75% by weight of an ethylene-propylene block copolymer having a melt flow rate of 30 to 150 g/10 min (as measured at 230°C under a load of 2.16 Kg), including a propylene homopolymer moiety having a melt flow rate of 50 to 300 g/10 min and an isotactic pentad fraction (P) of 0.98 or higher and 25 to 45% by weight of an ethylene copolymer having a melting point of 30 to 100°C, and
(ii) 1 to 25 parts by weight of talc having an average particle size of 5 µm or less and a specific surface area of 3.5 m²/g or larger,

   the composition including a propylene homopolymer domain having an average lamella thickness of 8 nm or more, as observed under an electron microscope along the normal direction of the plane (100) or (010).

摘要翻译： 一种热塑性聚合物组合物，它包含：（i）100重量份由55-75％（重量）熔体流动速率为30-150克/ 10分钟的乙烯 - 丙烯嵌段共聚物组成的热塑性聚合物组分 230℃，载荷2.16Kg），包括熔体流动速率为50-300克/ 10分钟，全同立构五单元组分数（P）为0.98或更高的丙烯均聚物部分和25-45重量％的 乙烯共聚物，其熔点为30〜100℃，（ii）1〜25重量份的平均粒径为5μm以下，比表面积为3.5m 2 / g以上的滑石，组合物 包括沿平面（100）或（010）的法线方向在电子显微镜下观察时平均薄层厚度为8nm或更大的丙烯均聚物区域。