Patent ID: 9683062
Date: 2017-06-20
CPC Classifications: C08F,C08J

Claim:
1. A process for the preparation of a porous propylene (co)polymer having a porosity higher than 0.33 cm 3 /g, carried out in the presence of a catalyst system comprising (a) a solid catalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds, one being present in an amount from 50 to 90% by mol with respect to the total amount of donors and selected from succinates, and the other selected from 1,3 diethers, (b) an aluminum alkyl and optionally (c) an external electron donor compound, and comprising the following steps: (i) contacting the catalyst components (a), (b) and optionally (c) for a period of time ranging from 1 to 60 minutes, at a temperature ranging from 35 to 55° C.; (ii) optionally pre-polymerizing with one or more olefins of formula CH (iii) polymerizing propylene in the optional presence of ethylene and/or C