Polyhydroxyl-compositions derived from castor oil with enhanced reactivity suitable for polyurethane-synthesis
US6897283B2 · kind B2 · utility
4Cited by
2References
22Claims
0Family size
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Key dates
| Filing date | Jul 30, 2001 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A reactive polyester polyol is described that is obtainable by half ester formation starting from at least one dicarboxylic anhydride and at least one hydroxyl group carrying, saturated or unsaturated fatty acid and/or a respective ester, in particular castor oil and/or ricinoleic acid, as well as final esterification by at least one polyol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.