Catalysts, method of preparing these catalysts, and polymerization processes wherein these catalysts are used
US5407884A · kind A · utility
59Cited by
5References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 9, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Aug 9, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ionic catalyst useful for the polymerization of olefins, diolefins and/or acetylenically unsaturated monomers is described. The catalyst comprises cyclopentadienyl derivatives of Group IV-B metals as cation and a compatible non-coordinating anion containing a plurality of boron atoms. Borate, carborate, borane, carborane, metallaborane and metallacarborane compounds exemplify anion sources and dihydrocarbyl-substituted bis(cyclopentadienyl) zirconium compounds exemplify the Group IV-B metal cation sources. Utility is illustrated for olefin polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.