Ziegler-natta catalyst for narrow to broad MWD of polyoefins, method of making, method of using, and polyolefins made therewith
US6693058B1 · kind B1 · utility
7Cited by
13References
59Claims
0Family size
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Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Oct 29, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, and an organoaluminum preactivating agent. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution and the fluff morphology of the resulting polyolefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.