Four component polymerization catalyst

摘要

A catalyst which comprises (a) a solid catalyst component which includes a magnesium-containing agent and at least one transition metal-containing agent; (b) an organometallic compound where the metal is a metal of Group II or Group III of the Periodic Table of the Elements; (c) a hydrocarbylhydrocarbyloxysilane compound; and (d) a halosilane compound is disclosed. This catalyst is useful in the polymerization of olefins.