Procatalyst component based on a transition metal compound on a carrier of magnesium chloride and manganese halide

摘要

PCT No. PCT/FI92/00265 Sec. 371 Date Jun. 1, 1994 Sec. 102(e) Date Jun. 1, 1994 PCT Filed Oct. 1, 1992 PCT Pub. No. WO93/07181 PCT Pub. Date Apr. 15, 1993Olefin polymerization catalysts the procatalyst component of which comprises a transition-metal compound on a magnesium chloride support material are known to all. Now the procatalyst component has been improved by incorporating a manganese (II) halide into it at a rate of at minimum approx. 0.1% and at maximum approx. 50% of the total molar amount of magnesium chloride and manganese (II) halide. The new polymerization catalyst has, among other things, the excellent special property that it yields a polyolefin with a broad molecular weight distribution.