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EP0700943A1 A highly stiff propylene-ethylene block copolymer composition and a process for producing the same 失效
一种高度刚性的丙烯 - 乙烯嵌段共聚物组合物和用于制备它们的方法

  • 专利标题： A highly stiff propylene-ethylene block copolymer composition and a process for producing the same
  • 专利标题（中）： 一种高度刚性的丙烯 - 乙烯嵌段共聚物组合物和用于制备它们的方法
  • 申请号： EP95112296.9
    申请日： 1995-08-04
  • 公开(公告)号： EP0700943A1
    公开(公告)日： 1996-03-13
  • 发明人: Oka, Takahiro , Kawazoe, Shunji , Yamane, Yasuhiro
  • 申请人： CHISSO CORPORATION
  • 申请人地址： 6-32, Nakanoshima 3-chome Kitaku Osaka JP
  • 专利权人： CHISSO CORPORATION
  • 当前专利权人： CHISSO CORPORATION
  • 当前专利权人地址： 6-32, Nakanoshima 3-chome Kitaku Osaka JP
  • 代理机构： Kraus, Walter, Dr.
  • 优先权： JP217865/94 19940818; JP100106/95 19950331
  • 主分类号： C08F297/08
  • IPC分类号： C08F297/08
A highly stiff propylene-ethylene block copolymer composition and a process for producing the same
摘要：
A propylene·ethylene block copolymer composition having a high stiffness and high-impact properties and its production process are provided,
   which composition is produced by using a specified Ziegler-Natta type catalyst;
   carrying out
   polymerization step (I) wherein homopolymerization of propylene is carried out by means of two or more polymerization vessels so as to afford 60 to 95% by weight based upon the total weight,
   and a specified range of the maximum value and the minimum value of the melt flow rates of the polymers obtained in the respective vessels; and
   carrying out polymerization step (II) wherein propylene-ethylene random copolymerization is carried out by means of one or more polymerization vessels so as to afford 5 to 40% by weight based upon the total quantity,
   the ratio of the melt flow rate at the polymerization step (I) to the melt flow rate at the polymerization step (II) being made to fall within a specified range,
   whereby the resulting ethylene·propylene block copolymer composition is far superior in the collective strength to known ethylene·propylene block copolymer compositions.
摘要（中）：

提供了具有高刚性和高冲击性能和其制备方法A propylene.ethylene嵌段共聚物组合物，该组合物产生通过使用指定的齐格勒 - 纳塔型催化剂; 进行聚合步骤（I）丙烯的worin均聚是由两个或多个聚合容器来进行的，以便通过基于总重量的重量，得到60％至95％，并且最大值的规定范围和最小值 在respectivement容器中得到的聚合物的熔体流动速率; 并进行聚合步骤（II）worin丙烯 - 乙烯无规共聚是由一个或多个聚合容器来进行的，以便通过基于总数量重，得到5〜40％，在所述的熔体流动速率的比率 聚合步骤（I）在聚合步骤（II）的熔体流动速率正在作出落入指定范围，由此所得到的乙烯·丙烯嵌段共聚物组合物是远远优于集体力量，已知乙烯·丙烯嵌段共聚物的组合物内 ，

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