Method for preparing PolyOrganoSiloxanes (POS) by ring (S)—opening polymerization and/or POS redistribution in the presence of carbene (S) and POS compounds produced by said method
US7772350B2 · kind B2 · utility
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32Claims
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Key dates
| Filing date | Dec 8, 2004 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Sep 10, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing polyorganosiloxanes (POS) by a ring-opening polymerization and/or linear, non-linear or cyclic POS redistribution in the presence of a nucleophilic carbene. The initial efficiency of the POS conversion is substantially increased at low temperature, resulting in less residual content of initial POS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.