Catalyst and process for polymerisation and copolymerisation of olefins.

摘要

A highly effective catalyst system for the polymerisation or copolymerisation of olefins comprises at least one metallocene as transition-metal compound and at least one aluminium compound of the formula II and/or of the formula (III) where, in the formulae (II) and (III), the radicals R<14> may be identical or different and are an alkyl group, an aryl group, benzyl or hydrogen, and p is an integer from 2 to 50, and at least one aluminium compound of the formula IV where R<15>, R<16> and R<17> are identical or different and are a hydrogen atom, an alkyl group, an alkylsilyl group, an alkoxy group, an aryl group, an aryloxy group, an alkenyl group, an arylalkyl group, an alkylaryl group, an arylalkenyl group, a halogen atom or a radical of the formula -OSiR<15>R<16>R<17> where R<15>, R<16> and R<17> are as defined above.