Process for the preparation of a Ziegler-Natta catalyst.

摘要

The present invention relates to a process for the preparation of a catalyst of the Ziegler-Natta type based on a titanium compound precipitated by reduction of titanium on a magnesium chloride based support. The process comprises an impregnation step which comprises contacting the magnesium chloride based support with an electron donor compound D3, which is free from labile hydrogen. Polymers obtained with the catalyst prepared have a narrow molecular weight distribution.