Ziegler-natta catalyst for tuning MWD of polyolefin, method of making, method of using, and polyolefins made therewith
US6734134B1 · kind B1 · utility
16Cited by
13References
46Claims
0Family size
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Key dates
| Filing date | Oct 13, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Oct 13, 2020 |
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 that includes treating a magnesium dialkoxide compound with two halogenating/titanating agents, the second stronger than the first, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution of the resulting polyolefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.