Precursors and catalyst components for the polymerization of olefins
US11926690B2 · kind B2 · utility
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Key dates
| Filing date | Sep 17, 2019 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Jan 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A Ziegler-Natta catalyst component precursor made from or containing a mechanical mixture of (a) distinct particles of adducts of formula MgCl2(R1OH)n where R 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 of distinct particles of a solid compound containing more than 50% by weight of Sift units and having average particle size (P50b), wherein the ratio P50b/P50a ranges from 0.4 to 1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.