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    A highly stiff propylene-ethylene block copolymer composition and a process for producing the same
    1.
    发明公开
    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

    公开(公告)号：EP0700943A1

    公开(公告)日：1996-03-13

    申请号：EP95112296.9

    申请日：1995-08-04

    申请人： CHISSO CORPORATION

    发明人： Oka, Takahiro ,  Kawazoe, Shunji ,  Yamane, Yasuhiro

    IPC分类号： C08F297/08

    CPC分类号： C08F297/083

    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.

    摘要翻译： 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 ，

    Continuous process for producing ethylene/propylene copolymers
    6.
    发明公开
    Continuous process for producing ethylene/propylene copolymers 失效
    Kontinueierliches Verfahren zur Herstellung vonÄthylen-Propylen-Copolymeren。

    公开(公告)号：EP0480536A2

    公开(公告)日：1992-04-15

    申请号：EP91202644.0

    申请日：1988-03-30

    申请人： CHISSO CORPORATION

    发明人： Chiba, Hiromasa ,  Oka, Takahiro ,  Kawazoe, Shunji

    IPC分类号： C08F210/16 ,  C08F2/00 ,  C08F297/08

    CPC分类号： C08F10/06 ,  C08F297/083 ,  Y10S526/905 ,  C08F2/001

    摘要： Continuous process for producing high melting and viscoelastic ethylene-propylene copolymers is disclosed.
    This process is characterized (1) using two or more polymerizers connected in series; (2) supplying all of a catalyst and molecular weight regulator (hydrogen) to the first polymerizer; (3) removing gas from the second and/or subsequent (if any) polymerization at a rate of tanks being 0.5 to 10 V₁/Hr (V₁/Hr (V₁ being a volume of the polymerizer) calculated at NTP. Monomers having an ethylene content of 5 wt.% or less are supplied to a first step carried out as described above; after which, in a subsequent polymerizer, monomers containing at least 10 wt.% ethylene are introduced and polymerized.

    摘要翻译： 公开了生产高熔点和粘弹性乙烯 - 丙烯共聚物的连续方法。 该方法的特征是（1）使用串联连接的两种或多种聚合反应器; （2）将所有催化剂和分子量调节剂（氢）供应给第一聚合反应器; （3）以第二和/或随后的（如果有的话）聚合中的气体以0.5至10V1 / Hr（V1 / Hr（V1是聚合反应器的体积））计算的速率除去气体，其具有乙烯 将5重量％以下的含量供给到如上所述进行的第一步骤;之后，在随后的聚合反应器中，引入含有至少10重量％乙烯的单体并进行聚合。

    Ethylene-propylene copolymers and process for producing the same
    8.
    发明公开
    Ethylene-propylene copolymers and process for producing the same 失效
    乙烯 - 丙烯共聚物及其生产方法

    公开(公告)号：EP0103987A3

    公开(公告)日：1985-06-05

    申请号：EP83304770

    申请日：1983-08-17

    申请人： Chisso Corporation

    发明人： Chiba, Hiromasa ,  Obama, Kenjiro ,  Kawazoe, Shunji ,  Oka, Takahiro ,  Satoh, Akihiro

    IPC分类号： C08F297/08

    CPC分类号： C08F297/083 ,  C08L23/10 ,  C08L23/16 ,  C08L2205/02 ,  C08L2666/04

    摘要： An ethylene-propylene block copolymer capable of producong foamed shaped articles with a uniform and fine foam structure even without adding resins comprises a propylene homopolymer portion and an ethylene-propylene (EP) copolymer portion and is characterised in that the homopolymer portion is obtained by polymerizing propylene in two stages so that the propylene homopolymer portion comprises a lower and a higher molecular weight portion, relative to the molecular weight of the propylene homopolymer portion; there is a specified relationship between the melt flow rates under defined conditions; the EP copolymer portion has an ethylene content of 60 to 95 % based on the copolymer portion; and the block copolymer has an ethylene content of 10 to 40 % based on the block copolymer.