Propylene polymerization process with enhanced catalyst activity
    1.
    发明授权
    Propylene polymerization process with enhanced catalyst activity 失效
    丙烯聚合方法具有增强的催化剂活性

    公开(公告)号:US06630544B1

    公开(公告)日:2003-10-07

    申请号:US10125757

    申请日:2002-04-18

    IPC分类号: C08F442

    CPC分类号: C08F10/06 C08F110/06 C08F2/00

    摘要: A process for polymerizing propylene is disclosed. The process involves charging propylene and about 90 to 99% of an organoaluminum cocatalyst to a reactor and heating this mixture to at least about 50° C. This is followed by addition of a premix of 1 to 10% of the organoaluminum cocatalyst with a magnesium halide-supported Ziegler-Natta catalyst. The temperature of the reaction mixture is maintained to produce a propylene polymer. The process gives improved catalyst activity.

    摘要翻译: 公开了一种聚合丙烯的方法。 该方法包括将丙烯和约90至99%的有机铝助催化剂装入反应器中,并将该混合物加热至至少约50℃。随后加入1至10%的有机铝助催化剂与镁 卤化物载体的齐格勒 - 纳塔催化剂。 保持反应混合物的温度以产生丙烯聚合物。 该方法提供了改进的催化剂活性。

    Supported olefin polymerization catalysts
    4.
    发明授权
    Supported olefin polymerization catalysts 失效
    负载型烯烃聚合催化剂

    公开(公告)号:US06310150B1

    公开(公告)日:2001-10-30

    申请号:US09879443

    申请日:2001-06-12

    IPC分类号: C08F444

    摘要: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.

    摘要翻译: 提供负载型异金属茂催化剂,其中载体是颗粒聚合材料。 催化剂具有过渡金属络合物,其含有与过渡金属相关的至少一个阴离子,聚合稳定的杂原子配体和沉积在载体上的硼活化剂化合物。 用于本发明的异金属茂催化剂的聚合物载体是乙烯的均聚物和乙烯和C 3-8α-烯烃的共聚物。

    Jigsaw puzzle and technique
    5.
    发明授权
    Jigsaw puzzle and technique 失效
    拼图和技巧

    公开(公告)号:US5022655A

    公开(公告)日:1991-06-11

    申请号:US394667

    申请日:1989-08-16

    申请人: Karen E. Meyer

    发明人: Karen E. Meyer

    IPC分类号: A63F9/10

    CPC分类号: A63F9/10

    摘要: A jigsaw puzzle includes outer straight edge pieces forming a rectangular puzzle perimeter; a number of interior straight edge pieces suggesting an interior rectangle and increasing the proportion of the number of straight edge pieces to the total number of pieces in the puzzle; and a number of joiner pieces, some of the joiner pieces crossing the bounary of the interior polygon, and others of the joiner pieces at positions remote from the boundary.

    摘要翻译: 拼图包括形成矩形拼图周边的外直边片; 一些内部的直边部分表示内部矩形,并将直边片数量的比例增加到拼图中的总数; 以及多个接合件,一些连接件穿过内部多边形的弹性体,以及其他的接合件在远离边界的位置。