| 摘要 |
<p>CATALYST AND PROCESS FOR THE POLYMERIZATION OF ALPHA-OLEFINS 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 polymerization, bulk polymerization and techniques in which polymerization is accomplished utilizing monomer substantially in the vapor phase.</p> |
