| 摘要 |
<p>An improved polymerization catalyst, its preparation, and use are disclosed. The catalyst is one prepared by reacting a benzoic acid ester, an alkoxytitanium compound, and a magnesium halide having alkanol associated therewith to form a first catalyst component then reacting said first catalyst component with an organoaluminium halide and then reacting the resulting solid with a halogenating agent comprising a titanium halide.</p> |
