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    • 7. 发明授权
    • Transition metal hydrides as co-catalysts for olefin polymerization
    • 过渡金属氢化物作为烯烃聚合的助催化剂
    • US5276119A
    • 1994-01-04
    • US997802
    • 1992-12-29
    • Donald R. Kelsey
    • Donald R. Kelsey
    • C08F4/76C08G61/08
    • C08G61/08Y10S526/943
    • An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formulaL.sub.x --M--Hwherein M is a group IVB transition metal including zirconium, titanium or hafnium; L is a ligand selected independently from the group of hydrogen, halide and organic ligands such as an optionally substituted C.sub.1-20 alkyl or alkenyl, an optionally substituted C.sub.3-20 cycloalkyl or cycloalkenyl having 3 to 6 carbon atoms in the ring, an optionally substituted C.sub.5-20 cycloakadienyl having 5 carbon atoms in the cycloalkadienyl ring, or an optionally substituted C.sub.6-20 aryl or fused aryl, where at least one L is a cycloalkadienyl; and x is one less than the valence of M. The optional substitutions on the organic ligands include halogens, preferably chloride or flouride; C.sub.1-6 alkyl; C.sub.1-6 alkoxy; and C.sub.1-6 haloalkyl. The preferred ligand is a C.sub.5-20 cycloalkadienyl having 5 carbon atoms in the cycloalkadienyl group, e.g. cyclopentadienyl. The co-catalysts of this invention are combined with molybdenum or tungsten metathesis catalysts to provide an active catalytic system for the polymerization of cycloolefins, such as dicyclopentadiene.
    • 公开了改进的烯烃复分解催化剂体系。 催化剂体系包括过渡金属卤化物复分解催化剂和式Lx-M-H的有机过渡金属氢化物助催化剂,其中M是含有锆,钛或铪的IVB族过渡金属; L是独立地选自氢,卤化物和有机配体如任选取代的C 1-20烷基或烯基,任选取代的C 3-20环烷基或环中具有3至6个碳原子的环烯基的配体,任选取代的 在环二烯基环中具有5个碳原子的C 5-20环烷二烯基,或任选取代的C 6-20芳基或稠合芳基,其中至少一个L是环二烯基; 且x小于M的化合价。有机配体上的任选取代包括卤素,优选氯化物或氟化物; C 1-6烷基; C 1-6烷氧基 和C 1-6卤代烷基。 优选的配体是在环烷二烯基中具有5个碳原子的C 5-20环烷二烯基, 环戊二烯基。 本发明的助催化剂与钼或钨复分解催化剂组合以提供用于环烯烃如二环戊二烯聚合的活性催化体系。