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    Process for producing propylene-ethylene block copolymers
    2.
    发明授权
    Process for producing propylene-ethylene block copolymers 失效
    制备丙烯 - 乙烯嵌段共聚物的方法

    公开(公告)号：US4254237A

    公开(公告)日：1981-03-03

    申请号：US30523

    申请日：1979-04-16

    申请人： Akinobu Shiga ,  Masahiro Kakugo ,  Hajime Sadatoshi ,  Kazuki Wakamatsu ,  Hiroshi Yoshioka

    发明人： Akinobu Shiga ,  Masahiro Kakugo ,  Hajime Sadatoshi ,  Kazuki Wakamatsu ,  Hiroshi Yoshioka

    IPC分类号： C08F297/00 ,  C08F297/08

    CPC分类号： C08F297/086

    摘要： A process for producing propylene-ethylene block copolymers by a three-step polymerization technique using a stereoregular catalyst, characterized in that the first-step polymerization is carried out by supplying propylene alone or a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 6/94 or less, thereby polymerizing 60 to 95% by weight of the total polymerization amount, the second-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 15/85 to 79/21, thereby polymerizing 1 to 20% by weight of the total polymerization amount, and the third-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 50/50 to 89/11, thereby polymerizing 4 to 35% by weight of the total polymerization amount, with the ethylene/propylene reaction ratio in the third step made larger than that in the second step. Said process can give propylene-ethylene block copolymers markedly well balanced in impact strength, stiffness, transparency and impact blushing.

    摘要翻译： 一种通过使用立体规则催化剂的三步聚合技术制备丙烯 - 乙烯嵌段共聚物的方法，其特征在于第一步聚合是通过仅供应丙烯或丙烯/乙烯混合物进行的，以使乙烯/丙烯反应比 为6/94以下，由此聚合60〜95重量％的总聚合量，第二步聚合是通过供给丙烯/乙烯混合物进行的，以使乙烯/丙烯反应比为15/85〜79 / 21，由此聚合1至20重量％的总聚合量，第三步聚合通过供应丙烯/乙烯混合物进行，使得乙烯/丙烯反应比为50/50至89/11， 从而聚合4〜35重量％的总聚合量，第3步骤中的乙烯/丙烯反应比例大于第2步骤。 所述方法可以使丙烯 - 乙烯嵌段共聚物在冲击强度，刚度，透明度和冲击冲刷中显着地平衡。

    Process for producing propylene-ethylene block copolymers
    4.
    发明授权
    Process for producing propylene-ethylene block copolymers 失效
    制备丙烯 - 乙烯嵌段共聚物的方法

    公开(公告)号：US4337326A

    公开(公告)日：1982-06-29

    申请号：US194954

    申请日：1980-10-08

    申请人： Akinobu Shiga ,  Masahiro Kakugo ,  Hajime Sadatoshi ,  Kazuki Wakamatsu ,  Hiroshi Yoshioka

    发明人： Akinobu Shiga ,  Masahiro Kakugo ,  Hajime Sadatoshi ,  Kazuki Wakamatsu ,  Hiroshi Yoshioka

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

    CPC分类号： C08F297/086

    摘要： A process for producing a propylene-ethylene block copolymer by subjecting propylene and ethylene to three-step polymerization using a stereoregular polymerization catalyst, which comprises in the first step polymerizing propylene alone or a propylene/ethylene mixture so that the average ethylene/propylene reaction ratio is 6/94 or less, thereby polymerizing 60 to 95% by weight of the total polymerization amount, in the second step polymerizing a propylene/ethylene mixture so that the average ethylene/propylene reaction ratio is 25/75 to 67/33, thereby polymerizing 1 to 20% by weight of the total polymerization amount, and in the third step polymerizing a propylene/ethylene mixture so that the average ethylene/propylene reaction ratio is 76/24 to 89/11, thereby polymerizing 4 to 35% by weight of the total polymerization amount, wherein in the second and third steps, ethylene alone is supplied thereby gradually decreasing the amount of propylene in the polymerization system from the first step to the succeeding steps.

    摘要翻译： 丙烯 - 乙烯嵌段共聚物的制备方法是使用立体规则聚合催化剂对丙烯和乙烯进行三步聚合，其中包括在第一步中聚合单独的丙烯或丙烯/乙烯混合物，使得平均乙烯/丙烯反应比 为6/94以下，由此聚合60〜95重量％的总聚合量，在丙烯/乙烯混合物的聚合中，平均乙烯/丙烯的反应比为25/75〜67/33， 聚合1至20重量％的总聚合量，并且在第三步中聚合丙烯/乙烯混合物使得平均乙烯/丙烯反应比为76/24至89/11，从而聚合4至35重量％ 的总聚合量，其中在第二和第三步骤中，仅供应乙烯，从而逐渐降低聚合体系中丙烯的量 迈向后续步骤。

    Propylene-ethylene copolymer having improved stretchability
    10.
    发明授权
    Propylene-ethylene copolymer having improved stretchability 失效
    具有改善的拉伸性的丙烯 - 乙烯共聚物

    公开(公告)号：US4414373A

    公开(公告)日：1983-11-08

    申请号：US399146

    申请日：1982-07-16

    申请人： Akinobu Shiga ,  Kiyoshi Matsuyama ,  Masahiro Kakugo ,  Yukio Naito ,  Seiichiro Ima ,  Katsuyoshi Yamashita

    发明人： Akinobu Shiga ,  Kiyoshi Matsuyama ,  Masahiro Kakugo ,  Yukio Naito ,  Seiichiro Ima ,  Katsuyoshi Yamashita

    IPC分类号： C08F4/00 ,  C08F2/00 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00 ,  C08F10/06 ,  C08F210/00 ,  C08F210/06 ,  C08F210/16

    CPC分类号： C08F210/06

    摘要： In a process for producing polypropylene comprising polymerizing propylene in the presence of hydrogen and a catalyst system comprising (A) titanium trichloride obtained by reducing titanium tetrachloride with an organoaluminum compound and reacting the reduced solid with an ether represented by the formula:R.sup.1 --O--R.sup.2wherein R.sup.1 and R.sup.2 are defined hereinbefore, and a halogen compound selected from the group consisting of (i) halogen or interhalogen compounds of the formula, X.sup.1 X.sup.2.sub.a (wherein X.sup.1, X.sup.2 and a are defined hereinbefore), (ii) titanium halides, and (iii) organic halogen compounds, simultaneously or successively and (B) an organoaluminum compound, the improvement which comprises supplying ethylene together with propylene to the polymerization system such that the ethylene concentration in the vapor phase of the system based on the total amount of propylene, ethylene and hydrogen in the vapor phase of the system is 0.15 to 1.5 mol % to obtain a propylene-ethylene copolymer having an ethylene content of from 0.1 to 1.0 wt % is disclosed. The propylene-ethylene copolymer is improved in stretchability.

    摘要翻译： 在制备聚丙烯的方法中，包括在氢气存在下聚合丙烯和催化剂体系，所述催化剂体系包含（A）通过用有机铝化合物还原四氯化钛获得的三氯化钛，并将还原的固体与由下式表示的醚反应：R1-O- 其中R 1和R 2如上定义，卤素化合物选自（ⅰ）卤素或下式的卤代化合物：X1X2a（其中X1，X2和a定义如前），（ⅱ）卤化钛和 （iii）有机卤素化合物，同时或相继和（B）有机铝化合物，其改进包括将乙烯与丙烯一起供应到聚合体系中，使得基于丙烯总量的体系的气相中的乙烯浓度 ，系统的气相中的乙烯和氢为0.15〜1.5摩尔％，得到丙烯 - 乙烯共聚物 公开了乙烯含量为0.1〜1.0重量％。 丙烯 - 乙烯共聚物的拉伸性提高。