Disclosed is a homogeneous catalyst system for producing an ethylene homopolymer or an ethylene copolymer with α-olefin. Specifically, this invention pertains to a transition metal catalyst which has stability under high temperature solution polymerization at 120˜250° C., in which a cyclopentadiene derivative and an electron donating substituent, both of which are bonded to a Group IV transition metal acting as a central metal, are crosslinked through a silyl derivative substituted with a cyclohexyl, to a catalyst system including such a transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and to a method of producing an ethylene homopolymer or an ethylene copolymer with α-olefin, having high molecular weight, using the catalyst system under conditions of high-temperature solution polymerization. The catalyst according to this invention has excellent thermal stability and compatibility with a paraffin hydrocarbon solvent and thus is effective in the production of an ethylene homopolymer or an ethylene copolymer with α-olefin having various properties in commercial polymerization processes.
本发明揭示了一种用于生产
乙烯均聚物或含α-烯烃的
乙烯共聚物的均相催化剂系统。具体地,本发明涉及一种过渡
金属催化剂,其在120~250℃高温溶液聚合条件下具有稳定性,其中一个
环戊二烯衍
生物和一个电子给体取代基,两者均与作为中心
金属的IV族过渡
金属结合,通过取代有环己基的
硅烷衍
生物交联形成催化剂体系,包括这种过渡
金属催化剂和铝氧烷共催化剂或
硼化合物共催化剂,并且在高温溶液聚合条件下使用这种催化剂体系生产具有高分子量的
乙烯均聚物或含α-烯烃的
乙烯共聚物的方法。本发明的催化剂具有优异的热稳定性和与石蜡烃溶剂的相容性,因此在商业聚合过程中有效地生产具有各种性能的
乙烯均聚物或含α-烯烃的
乙烯共聚物。