Process for making hydroxy-terminated aromatic oligomeric phosphates
US5508462A · kind A · utility
7Cited by
6References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 7, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Dec 7, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is a process for forming hydroxy-terminated aromatic oligomeric phosphates by the initial reaction of a monoaryl dihalophosphate, such as monophenyl dichlorophosphate, with an aromatic diol, such as resorcinol, to form a halo-terminated aromatic oligomeric phosphate and the subsequent reaction of that halo-terminated phosphate with aromatic diol to form the hydroxy-terminated aromatic oligomeric phosphate. The initial and subsequent reactions preferably employ a Lewis acid catalyst, such as magnesium dichloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.