Olefin polymerization process
    4.
    发明授权
    Olefin polymerization process 有权
    烯烃聚合工艺

    公开(公告)号:US6127484A

    公开(公告)日:2000-10-03

    申请号:US302059

    申请日:1999-04-29

    IPC分类号: C08L23/04 C08F8/00 C08L23/00

    摘要: A multiple stage or multiple zone process for making olefin polymers is disclosed. A single-site catalyst, preferably one that contains a heteroatomic ligand, is used in the first stage or zone, and a Ziegler-Natta catalyst is used at a higher temperature in later stages or zones. A parallel multiple zone process is also described. The processes, which can be performed adiabatically, give polymers with improved thermal processing ability.

    摘要翻译: 公开了制备烯烃聚合物的多级或多区域方法。 在第一阶段或区域中使用单中心催化剂,优选含有杂原子配体的单中心催化剂,并且在后期阶段或区域中以更高的温度使用齐格勒 - 纳塔催化剂。 还描述了并行多区域过程。 可以绝热地进行的方法给具有改进的热处理能力的聚合物。