Patent ID: 9593178
Date: 2017-03-14
CPC Classifications: C08F

Claim:
1. A pre-polymerized catalyst component for the polymerization of olefins CH 2 ═CHR, wherein R is hydrogen or a C 1 -C 12 hydrocarbon group, comprising a non-stereospecific solid catalyst component containing Ti, Mg and a halogen, and an ethylene/propylene block (co)polymer from 0.1-0.9 g per g of said solid catalyst component, said pre-polymerized catalyst component being characterized by a mercury porosity, due to pores having a radius up to 1 μm, from 0.15 to 0.30 cm 3 /g and at least 55% of said porosity is due to pores having a pore radius up to 0.2 μm.