Olefin polymerization catalyst
US4988656A · kind A · utility
37Cited by
21References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | May 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprises the product formed by (A) forming a solution of a magnesium-containing species from a magnesium carbonte or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic ether; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.