Ziegler-natta catalysts for olefin polymerization
US6174971A · kind A · utility
27Cited by
9References
121Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 28, 1997 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Jan 28, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation which includes treating a soluble magnesium compound with successively stronger chlorinating-titanating reagents. The catalyst may be used in polymerization of olefins, particularly ethylene, to produce a polymer with low amount of fines, large average fluff particle size and narrow molecular weight distribution. The catalyst has high activity and good hydrogen response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.