Patent ID: 11926690
Assignee: BASELL POLIOLEFINE ITALIA S.R.L.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A Ziegler-Natta catalyst component precursor comprising:
a mechanical mixture of
(a) distinct particles of adducts of formula MgCl2(R1OH)n where R1 is a C1-C8 alkyl group, and n is from 0.2 to 6 having average particle size (P50a) ranging from 5 to 100 μm and
(b) from 0.2 to 5.0% by weight, based on the total weight of mixture (a)+(b), of distinct particles of a solid compound containing more than 50% by weight of SiO2 units and having average particle size (P50b),
wherein the ratio P50b/P50a ranges from 0.4 to 1.5.