Prepolymerized catalyst components for the polymerization of olefins
US6468938B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides new prepolymerized catalyst components for the (co)polymerization of olefins CH2═CHR, wherein R is hydrogen or a C1-C12 alkyl group, characterized by comprising a solid catalyst component, comprising Ti, Mg, halogen and an electron donor compound, being capable of yielding, under standard polymerization conditions, a propylene homopolymer having an insolubility in xylene at 25° C. higher than 90%, which is prepolymerized with ethylene to such an extent that the amount of the ethylene prepolymer is up to 100 g per g of said solid catalyst component. These solid catalyst components display to obtain a high catalyst activity, a high isotactic index, and are not affected by aging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.