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    • 4. 发明授权
    • Transition metal/rare earth catalyst, olefin polymeration process, and
polymer produced
    • 过渡金属/稀土催化剂,烯烃聚合方法和生产的聚合物
    • US5260244A
    • 1993-11-09
    • US955606
    • 1992-10-01
    • Ted M. Pettijohn
    • Ted M. Pettijohn
    • C08F4/646C08F10/00
    • C08F10/00Y10S526/943
    • A polymerization catalyst system is formed by combining an organometal compound and a transition metal compound to produce a catalyst A; and combining catalyst A and a catalyst B comprising a rare earth complex having a formula Cp.sub.n MX.sub.4-n.M'L.sub.x, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with an alkyl or alkyl silyl radical, M is yttrium, scandium or a rare earth metal having an atomic number in the range of 57 to 71, M' is an alkali metal, L is a suitable electron donor ligand, X is a halogen, n is 1 or 2, and x is a number corresponding to the value needed to form a stable complex.Optionally catalyst A is contacted with a rare earth metal halide.Optionally catalyst B is contacted with an alkali or alkaline earth metal alkyl.Optionally a hydrocarbyl aluminum compound can be contacted with catalyst B or with the catalyst system.
    • 通过组合有机金属化合物和过渡金属化合物以形成催化剂A形成聚合催化剂体系; 并且将催化剂A和包含具有式CpnMX4-n.M'Lx的稀土络合物的催化剂B组合,其中Cp是环烷基或被烷基或烷基甲硅烷基取代的环戊二烯基,M是钇,钪或稀土金属,其具有 57至71的范围内的原子序数,M'是碱金属,L是合适的电子给体配体,X是卤素,n是1或2,x是与形成 稳定复杂。 任选地,催化剂A与稀土金属卤化物接触。 任选地,催化剂B与碱金属或碱土金属烷基接触。 任选地,烃基铝化合物可以与催化剂B或催化剂体系接触。