Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst
    1.
    发明授权
    Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst 有权
    使用烷基锂化合物作为助催化剂的聚合催化剂体系和方法

    公开(公告)号:US07022781B2

    公开(公告)日:2006-04-04

    申请号:US11174874

    申请日:2005-07-05

    IPC分类号: C08F4/02 C08F4/646 C08F4/69

    摘要: A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in combination with at least one metal alkyl selected from the group consisting of alkyl zinc compounds, alkyl aluminum compounds, alkyl boron compounds, and mixtures thereof and iii) mixtures thereof can be used to polymerize olefins to produce a low density polymer with a decreased melt index and/or high load melt index. This catalyst system also can be used with a Ziegler-Natta catalyst system to polymerize olefins. Polymerization processes using these catalyst system compositions are also provided. Polymers resulting from polymerization processes using the inventive catalyst and cocatalyst systems have a decreased high load melt index, decreased melt index, increased fluff bulk density, and are useful as components to make bi-modal molecular weight resins for film and/or blow molding applications.

    摘要翻译: 一种催化剂体系组合物,其包含负载在二氧化硅 - 二氧化钛载体上的铬化合物,其中所述催化剂体系已用一氧化碳还原,并且选择由以下组成的组的助催化剂:i)烷基锂化合物,ii)二烷基铝醇盐与 选自烷基锌化合物,烷基铝化合物,烷基硼化合物及其混合物中的至少一种金属烷基酯和iii)其混合物可用于聚合烯烃以产生具有降低的熔体指数的低密度聚合物和/ 或高负荷熔体指数。 该催化剂体系也可与齐格勒 - 纳塔催化剂体系一起使用以聚合烯烃。 还提供了使用这些催化剂体系组合物的聚合方法。 使用本发明的催化剂和助催化剂体系的聚合方法产生的聚合物具有降低的高负荷熔体指数,降低的熔体指数,增加的绒毛堆积密度,并且可用作制备用于膜和/或吹塑应用的双模态分子量树脂的组分 。

    Ethylene copolymer compositions
    4.
    发明授权
    Ethylene copolymer compositions 失效
    乙烯共聚物组合物

    公开(公告)号:US5962592A

    公开(公告)日:1999-10-05

    申请号:US999750

    申请日:1997-08-05

    IPC分类号: C08F8/00

    摘要: An ethylene copolymer composition is provided that comprises: (a) an ethylene copolymer that has been produced with a metallocene catalyst system; (b) a crosslinking agent; and (c) a crosslinking coagent. This composition when crosslinked exhibits outstanding physical properties.

    摘要翻译: 提供一种乙烯共聚物组合物,其包含:(a)已经用茂金属催化剂体系制备的乙烯共聚物; (b)交联剂; 和(c)交联助剂。 当交联时该组合物表现出优异的物理性能。

    Catalyst composition and the use in olefin polymerization
    8.
    发明授权
    Catalyst composition and the use in olefin polymerization 失效
    催化剂组合物和在烯烃聚合中的应用

    公开(公告)号:US5480848A

    公开(公告)日:1996-01-02

    申请号:US236810

    申请日:1994-05-02

    申请人: Rolf L. Geerts

    发明人: Rolf L. Geerts

    CPC分类号: C08F10/00 C07F5/068

    摘要: A catalyst system comprising a transition metal-containing polymerization catalyst and a solid organoaluminoxy product produced by contacting a solution of an organoaluminoxane with an organic borane compound which is free of acidic hydrogen. The use of the catalyst system for the polymerization of olefins is also included.

    摘要翻译: 一种包含含过渡金属的聚合催化剂和通过使有机铝氧烷溶液与无酸性氢气的有机硼烷化合物接触而制备的固体有机铝氧化物产物的催化剂体系。 还包括催化剂体系用于烯烃聚合的用途。