Catalyst and process for the polymerization of alpha-olefins

Details Catalyst and process for the polymerization of alpha-olefins Catalyst and process for the polymerization of alpha-olefins

C - Chemistry, Metallurgy

08

F

252/108, 402/645

C08F 10/06 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1062693

CATALYST AND PROCESS FOR THE POLYMERIZATION OF ALPHA-OLEFINS ABSTRACT OF THE DISCLOSURE Novel catalysts and processes are disclosed for producing highly crystalline polypropylene and highly crystalline copolymers of propylene with ethylene or propylene with other alpha-olefins. Such catalysts reduce the amount of low-molecular-weight and amorphous polymers formed without serious effect on the polymerization yield. These novel catalysts and processes involve treating a aluminum alkyl compound with hydrogen sulfide and using the product thereof in conjunction with a titanium halide and, optionally, a sterically hindered, cyclic, tertiary amine a sterically hindered, cyclic amine oxide or a trihydrocarbylphosphite as a polymerization catalyst. Such catalysts are useful in slurry poly- merization, bulk polymerization and techniques in which polymerization is accomplished utilizing monomer substantially in the vapor phase.

217918

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