Process for forming bis(pentaerythritol phosphate) carbonate
US5235085A · kind A · utility
7Cited by
7References
20Claims
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Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65748
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Bis(pentaerythritol phosphate) carbonate can be formed by the reaction of pentaerythritol phosphate alcohol and dihydrocarbyl carbonate, such as diphenyl carbonate, preferably in the presence of a transesterification catalyst, such as an imidazole, and in a high boiling organic solvent, e.g., a phosphate ester solvent, which allows for removal of by-product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.