Bis(pentaerythritol phosphate alcohol) alkylphosphonate
US5362898A · kind A · utility
7Cited by
6References
3Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 22, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Nov 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/527
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A bis(pentaerythritol phosphate alcohol) alkylphosphonate compound, such as one comprising an alkyl group of from about one to four carbon atoms, preferably bis(pentaerythritol phosphate alcohol) methylphosphonate, is a flame retardant compound. Such a compound can be prepared by the transesterification of a diphenyl alkyl phosphonate carrying the desired alkyl group with pentaerythritol phosphate alcohol. An alternative process of preparation comprises the reaction of pentaerythritol phosphate alcohol, a trialkylamine, and an alkylphosphonic dihalide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.