Process for making di(hydroxyalkylaryl) aryl phosphate compounds
US6479688B2 · kind B2 · utility
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Key dates
| Filing date | Apr 15, 2002 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Apr 15, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0066
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the formation of a di(hydroxyalkylaryl) aryl phosphate is disclosed which comprises the reaction of an o-alkyl substituted aromatic diol, e.g., an o-alkyl substituted hydroquinone such as o-t-butylhydro-quinone, and monoaryl dihalophosphate, such as monophenyl dichlorophosphate. This process can, in particular, be used to make certain di(hydroxy-o-alkylphenyl) phenyl phosphate compounds, preferably those that are p-hydroxy, such as di(p-hydroxy-o-t-butylphenyl) phenyl phosphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.