Basell Poliolefine Italia S.r.l.

Francesca Verrocchio

Giampiero Morini

Marco Ciarafoni

Gianni Collina

Monica Galvan

Roberto Pantaleoni

Ofelia Fusco

Benedetta Gaddi

Fabrizio Piemontesi

Joachim T M Pater

Joachim TM Pater

A process for the preparation of propylene polymer compositions carried out in the presence of a catalyst system comprising (a) a solid catalyst component having average particle size ranging from 15 to 80 &#x3bc;m comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which 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 being selected from 1,3 diethers, (b) an aluminum alkyl and optionally (c) an external electron donor compound, and comprising the following steps:

Process for the preparation of impact resistant propylene polymer compositions

A process for the preparation of propylene polymer compositions comprising from 50 to 90% by weight of a propylene polymer fraction insoluble in xylene at 25&#xb0; C., and from 10 to 50% by weight of an ethylene copolymer fraction soluble in xylene at 25&#xb0; C., said process being carried out in the presence of a specific catalyst system, is also characterized by the following step:

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Bologna, Italy

Francesca Verrocchio