STERICALLY DEMANDING DIALKOXYDIALKYLSILANES AS EXTERNAL DONORS FOR ZIEGLER CATALYSTS FOR THE POLYMERIZATION OF PROPYLENE

摘要

A polymerization method of propylene is disclosed. The process comprises contacting the propylene and optionally one or more comonomers in a gas phase polymerization reactor with a catalyst system containing an external electron donor system containing a Ziegler-Natta catalyst and di (bicyclo [2.2.1] heptan-2-yl) dimethoxysilane, Or the like.