Selective activity of metallocene-type catalyst for isotactic poly-alpha-olefin production
    5.
    发明公开
    Selective activity of metallocene-type catalyst for isotactic poly-alpha-olefin production 失效
    用于生产全同聚烯烃的茂金属催化剂的选择性作用

    公开(公告)号:EP1291365A2

    公开(公告)日:2003-03-12

    申请号:EP02079474.9

    申请日:1998-01-27

    IPC分类号: C08F4/642 C08F10/00

    摘要: This invention describes a process for preparing isotactic poly-alpha olefin of melt flow equal to or less than 8 dg/min comprising the steps of:

    A. providing a suitable catalyst system capable of producing isotactic poly-alpha olefin comprising a metallocene-type catalyst, an alumoxane as cocatalyst or catalyst activator, and optionally a catalyst support;
    B. ripening the suitable catalyst system of step A by contacting with an alkyl aluminum for a period of time of from 6 hours to 14 days ;
    C. polymerising a suitable monomer using the ripened catalyst system of step B ; and
    recovering the desired isotactic polyolefin.

    摘要翻译: 本发明描述了一种用于制备熔融流动的全同立构聚α-烯烃等于或小于8分克/分钟,包括以下步骤:A.提​​供合适的催化剂体系能生产全同立构聚α-烯烃包含金属茂型催化剂的 在铝氧烷作为助催化剂或活化剂的催化剂,和任选的催化剂载体; B.通过与烷基铝接触一段从6小时至14天内时间熟化步骤A的合适的催化剂体系; C.使用聚合物步骤B的熟化催化剂体系伊辛合适的单体; 和回收所需全同立构聚烯烃。

    Improved Ziegler-Natta catalysts for olefin polymerization
    8.
    发明公开
    Improved Ziegler-Natta catalysts for olefin polymerization 失效
    Verbesserte Ziegler-Natta KatalysatorenfürOlefinpolymerisation

    公开(公告)号:EP0855409A1

    公开(公告)日:1998-07-29

    申请号:EP98101439.2

    申请日:1998-01-28

    IPC分类号: C08F4/658 C08F10/00

    摘要: A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation which includes treating a soluble magnesium compound with successively stronger chlorination/titanation reagents. The catalyst may be used in polymerization of olefins, particularly ethylene, to produce a polymer with less fines, larger average fluff particle size and narrow molecular weight distribution. The catalyst has high activity and good hydrogen response.

    摘要翻译: 齐格勒 - 纳塔催化剂的新合成使用多步骤制备,其包括用相继更强的氯化/钛化试剂处理可溶性镁化合物。 该催化剂可用于烯烃,特别是乙烯的聚合反应,以产生具有较少细粉,较大的平均绒毛粒径和窄分子量分布的聚合物。 该催化剂具有高活性和良好的氢气响应。

    A process for producing an isotactic/syndiotactic polymer blend in a single reactor
    10.
    发明公开
    A process for producing an isotactic/syndiotactic polymer blend in a single reactor 失效
    西班牙语einzigen Reaktor的Verfahren zur Herstellung einer isotaktischen / syndiotaktischen Polymermischung

    公开(公告)号:EP0747403A1

    公开(公告)日:1996-12-11

    申请号:EP96109109.7

    申请日:1996-06-07

    IPC分类号: C08F10/00 C08F4/613

    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的组分和至少一种常规负载的齐格勒 - 纳塔催化剂来获得多催化剂体系。 金属茂催化剂包括金属茂化合物和电离剂。 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。