Metallocenes, their preparation and use in the polymerization of alpha-olefins

摘要

Catalytic component for the copolymerization of ethylene with alpha-olefins having general formula (I): wherein: A is a cyclopentadienyl derivative having general formula (II) B is selected from: 1) any of the cyclopentadienyl derivatives A defined above 2) a monofunctional cyclopentadienyl radical (F) selected from cyclopentadienyl, indenyl, fluorenyl and the relative alkyl, aryl, trialkylsilyl substituted derivatives; Q, a bridge between A and B, is a bifunctional radical.