| 摘要 |
Complexes of magnesium and titanium alkoxides useful as olefin polymerization procatalyst precursors, procatalysts containing the complexes, and their use as a catalyst component for the polymerization of olefin monomers are disclosed. The complexes are prepared by reacting a magnesium alkoxide and a titanium alkoxide in the presence of a clipping agent to form a solid complex. The solid complex then can be used to form a procatalyst by contacting it with a halogenating agent, optionally a tetravalent titanium halide, and optionally an electron donor. The procatalyst then can be converted to an olefin polymerization catalyst by contacting it with a cocatalyst and optionally a selectivity control agent. |
