Synthesis of urethanes and polyurethanes catalysed by carbenes
US8759469B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jul 25, 2008 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Aug 5, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparing a compound comprising at least a urethane group —HN—C(═O)—O, said process comprising a step (E) in which a compound (I) comprising at least an isocyanate functional group —N═C═O is reacted with an organic compound (II) carrying at least a hydroxyl group —OH, said reaction being carried out in a presence of a carbene (III) used as a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.