Patent ID: 8536287

Claim:
A process for the production of polypropylene comprising: polymerizing propylene and one or more optional comonomers in presence of a Ziegler-Natta catalyst; wherein the Ziegler-Natta catalyst comprises a titanium compound, which has at least one titanium-halogen bond, and an internal donor, both supported on a magnesium halide in active form, with the internal donor comprising at least 80 wt%, with respect to the total weight of the internal donor, of an enamino-imine, and an organoaluminium compound to produce a polypropylene having a molecular weight distribution M w /M n of at least 7; wherein the polypropylene is either a propylene homopolymer or a random copolymer of propylene with one or more comonomers, said comonomers being ethylene or a C 4 -C 10 alpha-olefin, said random copolymer comprising up to 6% by weight of comonomer, relative to the total weight of the random copolymer; and wherein the enamino-imine is of the formula: wherein R 2 and R 3 are each hydrogen, or a C 1 -C 20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, and R 2 and R 3 can be linked together to form a cycle; and R 1 and R 4 are each independently selected from a linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group.