Patent ID: 6657024
Filing Date: 2003-12-02
Classification: B01J,C08F,Y02P

Abstract:
A process for the polymerization or copolymerization of propylene monomer, comprising:(a) providing a Ziegler-Natta catalyst; (b) contacting the catalyst with an organoaluminum compound; (c) contacting the catalyst with at least one electron donor comprising n-butylmethyldimethoxysilane (BMDS) simultaneously with or subsequent to (b); (d) introducing the catalyst into a polymerization reaction zone containing the organoaluminum compound, the electron donor and propylene monomer; and (e) removing polypropylene homopolymer or copolymer from the polymerization reaction zone; wherein the polypropylene has a lower processability temperature as compared to a polypropylene formed in the absence of BMDS that is otherwise identical.