Patent ID: 9068029
Filing Date: 2015-06-30
Classification: C08F

Abstract:
1. A process for the preparation of propylene polymer compositions carried out in the presence of a catalyst system comprising the product obtained by contacting: (a) a solid catalyst component having an average particle size ranging from 15 to 80 μm comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two internal electron donor compounds, wherein one of the electron donor compounds is present in an amount from 50 to 90% by mol with respect to the total amount of donors and selected from succinates and another electron donor compound is selected from 1,3 diethers, (b) an aluminum hydrocarbyl compound wherein the hydrocarbyl is selected from C (c) an external electron donor compound, the process comprising the following steps: wherein the propylene polymer composition has an impact strength at determined according to ISO 180/1A at −20° C. from 5 to 10 KJ/m