Catalyst productivity in the polymerization of olefins
US4981929A · kind A · utility
8Cited by
8References
12Claims
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Key dates
| Filing date | Jun 23, 1986 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Jun 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Highly stereospecific olefin polymers are obtained in enhanced yield in a continuous gas-phase fluid bed process for polymerizing alpha monoolefins employing a catalyst system comprising (a) a solid titanium-containing procatalyst, (b) an organoaluminum activator compound, and (c) a selectivity control agent, by continuously adding dialkylaluminum halide to the reactor during polymerization and conducting polymerization at a temperature of 0.1.degree. to 5.0.degree. C. above the dew point temperature of the cycle gas in the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.