Supported polymerisation catalysts
US7528090B2 · kind B2 · utility
4Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2004 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Nov 27, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A supported polymerisation catalyst system comprises a porous support, a polymerisation catalyst and a cocatalyst wherein the support has been treated with an inert material such as polyisobutene. The support is preferably silica and is preferably treated with the inert material prior to contact with the other components. Preferably the polymerisation catalyst is a metallocene and the polymerisation catalyst system reduces the initial peak isotherm allowing for a smoother activity increase in particular for polymerisations carried out in the gas phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.