Asymmetric silicon-bridged metallocenes useful as catalysts in the polymerization of &agr;-olefins, process for their preparation and use of said metallocenes for the polymerization of &agr;-olefins
    10.
    发明授权
    Asymmetric silicon-bridged metallocenes useful as catalysts in the polymerization of &agr;-olefins, process for their preparation and use of said metallocenes for the polymerization of &agr;-olefins 失效
    可用作α-烯烃聚合中催化剂的不对称硅桥接金属茂,其制备方法和所述茂金属用于α-烯烃聚合的方法

    公开(公告)号:US06538082B2

    公开(公告)日:2003-03-25

    申请号:US09729099

    申请日:2000-12-05

    IPC分类号: C08F472

    CPC分类号: C07F17/00 Y10S526/943

    摘要: Novel asymmetric silicon-bridged metallocenes useful as catalysts in the polymerization of olefins and process for preparing said metallocenes. The novel metallocenes are represented by the general formula (I): (SiR′R″)(Cp)(Cp′)MXX′  (I) wherein Cp is a partially or fully hydrogenated fluorenyl moiety selected from those of formula (II) and (III) Cp′ is an indenyl group selected from those of formula (IV) M represents a transition metal selected from Ti, Zr and Hf, X and X′ represent, same or different from each other, a halogen atom, R1, R2 and R3 are, same or different from each other, an alkyl group containing 1 or 2 carbon atoms, an aryl group containing from 6 to 10 carbon atoms or a hydrogen atom, (SiR′R″) is a divalent group which bridges the two groups Cp and Cp′ repectively on position 9 and 1, R′ and R″ are, same or different from each other, an alkyl or aryl group containing from 1 to 10 carbon atoms. Process for producing said metallocenes and process for the polymerization of &agr;-olefins such as ethylene and propylene by means of said metallocenes.

    摘要翻译: 新型不对称硅桥接金属茂可用作烯烃聚合中的催化剂和制备所述金属茂的方法。新型金属茂由通式(I)表示:其中Cp是部分或完全氢化的芴基部分,其选自式(II )和(III)Cp'是选自式(IV)的茚基,M表示选自Ti,Zr和Hf的过渡金属,X和X'表示相同或不同的卤素原子,R1 中,R2和R3彼此相同或不同,含有1或2个碳原子的烷基,含有6至10个碳原子的芳基或氢原子,(SiR'R“)是二价基团, 在位置9和1上分别桥接两个基团Cp和Cp,R'和R“彼此相同或不同,含有1至10个碳原子的烷基或芳基。用于制备所述金属茂和方法 用于α-烯烃如乙烯的聚合 和丙烯通过所述金属茂。