AN IMPROVED TITANIUM TRICHLORIDE CATALYST SYSTEM FOR POLYMERIZING OLEFINS

摘要

A TiCl3 catalyst system is disclosed empolying the electron donor, dicyclopentyldimethoxysilane ("DCPMS"). Additionally disclosed is a process for polymerizing olefins in the presence of a catalyst system employing a titanium trichloride catalyst, an alkylaluminum co-catalyst, and dicyclopentyldimethoxysilane is provided. The polymerization process comprises providing a prepolymerized titanium trichloride catalyst, and polymerizing an alpha -olefin in the presence of the prepolymerized catalyst, a trialkylaluminum co-catalyst and dicyclopentyldimethoxysilane. The catalyst system of the invention provides increased catalyst activity for a TiCl3 catalyst and a very broad polymer molecular weight distribution.