| 摘要 |
<p>OLEFIN POLYMERIZATION CATALYST COMPOSITIONS AND POLYMERIZATION PROCESS A highly active and stereoselective olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgRIR'' wherein R' is an alkoxide or aryloxide group and R" is an alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in the presence of a halohydrocabon, and contacting the halogenated product with an acid halide and a tetravalent titanium compound.</p> |
