Supported polymerisation catalysts
US7452948B2 · kind B2 · utility
1Cited by
5References
26Claims
0Family size
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Key dates
| Filing date | Aug 14, 2003 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Mar 29, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method for the preparation of a supported polymerisation catalyst system comprises the combination of (i) a porous support (ii) a polymerisable monomer, (iii) a polymerisation catalyst, and (iv) a cocatalyst, characterised in that the polymerisable monomer is added to the porous support before addition of one or both of the polymerisation catalyst and the cocatalyst. The preferred polymerisation catalyst is a metallocene complex and the preferred porous support is silica. The resultant supported catalysts are stable over long periods of time. The supported catalyst are particularly suitable for use in the gas phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.