Activating supports based on phosphonium complexes
US8338324B2 · kind B2 · utility
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2References
11Claims
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Key dates
| Filing date | Dec 11, 2008 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Dec 11, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to the covalent anchorage of non-coordinating anions on mineral supports to prepare activating supports for the polymerisation of ethylene and alpha-olefins and wherein the activating species is provided by a phosphonium-borate or phosphonium alane pair. The invention also discloses the concomitant covalent anchorage of zwitterionic systems containing both the non-coordinating anion and the counter cation parts of the activating supports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.