Olefin polymerization process
    2.
    发明授权
    Olefin polymerization process 有权
    烯烃聚合工艺

    公开(公告)号:US08633287B2

    公开(公告)日:2014-01-21

    申请号:US13390697

    申请日:2010-08-17

    申请人: Joel David Citron

    发明人: Joel David Citron

    摘要: A polymerization process for copolymerizing ethylene and a series of α-olefins to form a branched polyethylene, in which the series of α-olefins is generated in-situ by an ethylene oligomerization catalyst, is improved if the oligomerization catalyst has a Schulz-Flory constant of about 0.30 to about 0.55. This makes very little higher molecular weight α-olefins, which allows for easy removal of unpolymerized α-olefins from the polyolefin product.

    摘要翻译: 用于使乙烯和一系列α-烯烃共聚以形成支链聚乙烯的聚合方法,其中通过乙烯低聚催化剂原位产生一系列α-烯烃,如果低聚催化剂具有Schulz-Flory常数 为约0.30至约0.55。 这使得非常少的较高分子量的α-烯烃,这允许容易地从聚烯烃产物中除去未聚合的α-烯烃。

    Process for a isotactic/syndiotactic polymer blend in a single reactor
    7.
    发明授权
    Process for a isotactic/syndiotactic polymer blend in a single reactor 失效
    在单个反应器中的全同立构/间同立构聚合物共混物的方法

    公开(公告)号:US5643846A

    公开(公告)日:1997-07-01

    申请号:US473680

    申请日:1995-06-07

    摘要: The present invention is a process for producing a catalyst system to produce polymer blends in a single reactor, polymer blends of isotactic polyolefins and syndiotactic polyolefins. The catalyst system is a combination of at least one metallocene catalyst and at least one conventional supported Ziegler-Natta catalyst. The multi-catalyst system is obtained by mixing the components of at least one metallocene catalyst and at least one conventional supported Ziegler-Natta catalyst. The metallocene catalyst comprises a metallocene compound and an ionizing agent. The conventional supported Ziegler-Natta catalyst comprises an aluminum alkyl and a transition metal compound with, optionally, an electron donor.

    摘要翻译: 本发明是一种用于生产在单个反应器中制备聚合物共混物的催化剂体系的方法,全同立构聚烯烃和间同立构聚烯烃的聚合物共混物。 催化剂体系是至少一种茂金属催化剂和至少一种常规负载的齐格勒 - 纳塔催化剂的组合。 通过混合至少一种茂金属催化剂和至少一种常规负载的齐格勒 - 纳塔催化剂的组分来获得多催化剂体系。 金属茂催化剂包括茂金属化合物和电离剂。 常规的支持齐格勒 - 纳塔催化剂包括烷基铝和任选地具有电子给体的过渡金属化合物。