Temperature control of MW in olefin polymerization using supported metallocene catalyst
US5608019A · kind A · utility
78Cited by
70References
30Claims
0Family size
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Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In gas phase polymerizations and copolymerizations of ethylene, temperature controls the molecular weight, expressed as MI (wherein MI is measured according to ASTM D-1238 Condition E), of the resin product. Increase in polymerization temperature produces decrease in MI; whereas, decrease in polymerization temperature produces increase in MI.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.