摘要 |
<p>Ethylene and alpha-olefins are homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising an organo metal cocatalyst and a titanium-containing catalyst component, said titanium-containing catalyst component being obtained by reacting together a porous particulate material. an organic magnesium compound, an oxygen containing compound, an acyl halide and titanium tetrachloride, a Group IIIa hydrocarbyl metal dihalide and C12, Br2, an interhalogen or mixtures thereof.</p> |