Catalyst for the manufacture of polyethylene with a broad or bimodal molecular weight distribution
US6051525A · kind A · utility
17Cited by
144References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 14, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Jul 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst composition is described for preparing a high activity catalyst in silica which produces, in a single reactor, polyethylene with a broad or bimodal molecular weight distribution. The catalyst is prepared from the interaction of silica, previously calcined at 600.degree. C., with dibutylmagnesium, 1-butanol and titanium tetrachloride and a solution of methylalumoxane and ethylenebis[1-indenyl]zirconium dichloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.