METALLOCENE CATALYSTS AND THEIR USE IN POLYMERIZATION PROCESSES
    10.
    发明申请
    METALLOCENE CATALYSTS AND THEIR USE IN POLYMERIZATION PROCESSES 有权
    金属催化剂及其在聚合工艺中的应用

    公开(公告)号:US20100298511A1

    公开(公告)日:2010-11-25

    申请号:US12739308

    申请日:2008-10-09

    IPC分类号: C08F4/54

    摘要: A process for polymerizing olefin(s) utilizing a cyclic bridged metallocene catalyst system to produce polymers with improved properties is provided. The catalyst system may include a cyclic bridged metallocene, LA(R′SiR′)LBZrQ2, activated by an activator, the activator comprising aluminoxane, a modified aluminoxane, or a mixture thereof, and supported by a support, where: LA and LB are independently an unsubstituted or a substituted cyclopentadienyl ligand bonded to Zr and defined by the formula (C5H4-dRd), where R is hydrogen, a hydrocarbyl substituent, a substituted hydrocarbyl substituent, or a heteroatom substituent, and where d is 0, 1, 2, 3 or 4; LA and LB are connected to one another with a cyclic silicon bridge, R′SiR′, where R′ are independently hydrocarbyl or substituted hydrocarbyl substituents that are connected with each other to form a silacycle ring; and each Q is a labile hydrocarbyl or a substituted hydrocarbyl ligand.

    摘要翻译: 提供了利用环状桥连金属茂催化剂体系聚合烯烃以制备具有改进性能的聚合物的方法。 催化剂体系可以包括由活化剂活化的环状桥连金属茂LA(R'SiR')LBZrQ2,活化剂包括铝氧烷,改性铝氧烷或其混合物,并由载体支持,其中:LA和LB是 独立地是未取代的或取代的环戊二烯基配体,其与Zr键合并由式(C5H4-dRd)定义,其中R是氢,烃基取代基,取代的烃基取代基或杂原子取代基,其中d是0,1,2 ,3或4; LA和LB通过环硅桥R'SiR'彼此连接,其中R'独立地是彼此连接形成硅环的烃基或取代的烃基取代基; 并且每个Q是不稳定的烃基或取代的烃基配体。