ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION

摘要

A magnesium titanium olefin polymerization procatalyst is prepared by A) reacting a diorganomagnesium compound with a source of active chlorine, (with the proviso that the amount of chlorine is insufficient to completely convert the diorganomagnesium to magnesium dichloride), then B) removing unreacted diorganomagnesium from the reaction product, then depositing a tetravalent titanium species on the reaction product This procatalyst is active for the solution polymerization of olefins when combined with a cocatalyst The source of active chlorine is preferably HCl or tertiary butyl chloride.