Compounds and catalysts for the polymerization of olefins
US6399533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1997 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Sep 10, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to components of catalysts for the polymerization of olefins comprising a metallocene compound and a magnesium halide which have particular values of porosity and surface area. Group 4 and vanadium metallocenes are useful metallocenes and the components typically include an electron donor such as an ether, ester or ketone. In particular the components of the invention have surface area (BET) greater than about 50 m2/g, porosity (BET) greater than about 0.15 cm3/g and porosity (Hg) greater than 0.3 cm3/g, with the proviso that when the surface area is less than about 150 m2g, the porosity (Hg) is less than about 1.5 cm3/g. The magnesium halide is complexed by an ether, ester, or ketone electro donor. The components of the invention are particularly suitable for the preparation of catalysts for the gas-phase polymerization of &agr;-olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.