BRIDGED METALLOCENE COMPOUND, OLEFIN POLYMERIZATION CATALYST USING THE COMPOUND AND ETHYLENE POLYMER OBTAINED BY USING THE CATALYST

摘要

It relates to a metallocene compound useful as an olefin polymerization catalyst or catalyst component, and an olefin polymerization method using an olefin polymerization catalyst containing the metallocene compound. More particularly, it relates to an olefin polymerization catalyst capable of producing an olefin polymer having a high melt tension, excellent mechanical strength and excellent particle properties with a high polymerization activity, an olefin polymerization method using this catalyst, an ethylene polymer which is obtained by the polymerization method and is excellent in moldability, easy openability, and particularly excellent in mechanical strength as compared with conventionally known ethylene polymers, and a thermoplastic resin composition containing the ethylene polymer. More particularly, it provides a molded article and a film formed from the ethylene polymer or the thermoplastic resin composition containing the ethylene polymer, and a laminate film comprising the film. It provides an olefin polymer which shows little neck-in in T-die molding, does not cause take-off surging, is particularly excellent in mechanical strength, and has a large number of long-chain branches caused by simultaneously inducing production of a macromonomer as a source of long-chain branches and repolymerization of the produced macromonomer in the coexistence of a single type or plural types of bridged metallocene compounds including a group derived from a cyclopentadienyl group having a different structure in the same polymerization system, an olefin polymerization catalyst and a polymerization method capable of efficiently producing the olefin polymer.