Supported polymerisation catalysts
    6.
    发明授权
    Supported polymerisation catalysts 失效
    负载型聚合催化剂

    公开(公告)号:US08536081B2

    公开(公告)日:2013-09-17

    申请号:US11667466

    申请日:2005-11-10

    摘要: Supported catalyst system for the polymerization of olefins, having at least two different monocyclopentadienyl transition metal compounds, one or more activators including an ionic compound having (i) a cation and (ii) an anion having up to 100 non-hydrogen atoms and the anion containing at least one substituent comprising a moiety having an active hydrogen, and one or more support materials. The supported “mixed or dual site” catalyst systems having different monocyclopentadienyl catalysts when activated by specific ionic activators lead to catalyst systems showing an improved balance of properties which may be used to prepare LLDPE polymers having broad melt flow ratios.

    摘要翻译: 用于烯烃聚合的负载催化剂体系,其具有至少两种不同的单环戊二烯基过渡金属化合物,一种或多种活化剂,其包括具有(i)阳离子和(ii)具有至多100个非氢原子的阴离子的离子化合物和阴离子 含有至少一个包含具有活性氢的部分的取代基和一种或多种载体材料。 当由特定的离子活化剂活化时,具有不同单环戊二烯基催化剂的“混合或双位点”催化剂体系导致催化剂体系显示改进的性能平衡,其可用于制备具有宽熔体流动比的LLDPE聚合物。

    Supported antistatic polymerization catalyst
    7.
    发明申请
    Supported antistatic polymerization catalyst 有权
    支持抗静电聚合催化剂

    公开(公告)号:US20070282085A1

    公开(公告)日:2007-12-06

    申请号:US11800590

    申请日:2007-05-07

    IPC分类号: C08F4/44

    摘要: The use of high activity “Single Site” polymerization catalysts often causes the fouling of polymerization reactors. The problem is particularly acute with gas phase polymerizations. While not wishing to be bound by theory it is believed that the fouling is initiated by the buildup of static charges in the reactor. The use of anti-static agents mitigates this problem, but typical antistatic agents contain polar species, which can deactivate the polymerization catalyst. We have now discovered that the use of a porous metal oxide support allows large levels of a selected antistatic agent to be used in a manner that reduces static/fouling problems in highly active polymerization catalysts.

    摘要翻译: 使用高活性“单点”聚合催化剂通常会导致聚合反应器的结垢。 气相聚合问题尤其严重。 虽然不希望被理论束缚,但据信污垢是由反应器中静电荷的累积引起的。 使用抗静电剂减轻了这个问题,但是典型的抗静电剂含有极性物质,这可以使聚合催化剂失活。 我们现在已经发现,使用多孔金属氧化物载体允许以降低高活性聚合催化​​剂中静电/结垢问题的方式使用大量选定的抗静电剂。