Phosphate ester flame retardants from resorcinol-ketone reaction products
US7365113B2 · kind B2 · utility
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7References
53Claims
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Inventors
Key dates
| Filing date | Sep 21, 2005 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Apr 5, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/529
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Flavan-based and spirodichroman compound-based phosphate esters prepared by reacting flavans and spirodichroman compounds with phosphorus oxychloride, monophenyl dichlorophosphate, or diphenyl chlorophosphate compounds are described. The flavans and spirodichroman compounds can be synthesized by the reaction of resorcinol with aliphatic acetone. Such phosphate esters can be used as flame retardants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.