Method for preparing ethylene copolymer
    6.
    发明公开
    Method for preparing ethylene copolymer 失效
    Verfahren zur Herstellung von einem Ethylencopolymeren。

    公开(公告)号:EP0572990A2

    公开(公告)日:1993-12-08

    申请号:EP93108824.9

    申请日:1993-06-02

    IPC分类号: C08F210/02 C08F4/64

    摘要: A method for preparing an ethylene copolymer which comprises the step of copolymerizing ethylene with an aromatic vinyl compound in the presence of a catalyst comprising (A) a specific transition metal compound represented by the formula I
    and (B) a cocatalyst such as an aluminoxane.

    摘要翻译: 一种制备乙烯共聚物的方法,其包括在催化剂存在下乙烯与芳族乙烯基化合物共聚的步骤,所述催化剂包含(A)由式I 表示的特定过渡金属化合物和(B)助催化剂,例如 铝氧烷

    Tubular film extrusion method of polypropylene
    8.
    发明公开
    Tubular film extrusion method of polypropylene 失效
    Verfahren zum Extrudieren einer Schlauchfolie aus Polypropylen。

    公开(公告)号:EP0650818A2

    公开(公告)日:1995-05-03

    申请号:EP94116698.5

    申请日:1994-10-22

    IPC分类号: B29C47/00 B29C47/88

    摘要: Described is a film forming method for a polypropylene resin composition, which comprises subjecting a polypropylene resin composition composed of 5 to 95 parts by weight of a syndiotactic polypropylene and 95 to 5 parts by weight of an isotactic polypropylene to air-cooled tubular film extrusion. By the air-cooled method which has heretofore had difficulty in obtaining a highly-transparent film from conventional isotactic polypropylene, a film having excellent transparency can be obtained.

    摘要翻译: 描述了一种用于聚丙烯树脂组合物的成膜方法,其包括将由5-95重量份的间同立构聚丙烯组成的聚丙烯树脂组合物和95-5重量份的全同立构聚丙烯进行风冷管状膜挤出。 通过迄今为止难以从常规的全同立构聚丙烯获得高透明膜的空气冷却方法,可以获得具有优异透明性的膜。