Halogenated phosphate-phosphites and their acid halides and acids
US4755547A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Apr 8, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/146
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Included are halogenated phosphate-phosphites and their acid halides and acids. The halogenated phosphate-phosphites can be prepared by a process comprising serially contacting PA0 (A) a phosphorus trihalide with a triol; PA0 (B) a halogenating agent; and PA0 (C) an oxirane or an alcohol, under conditions sufficient to prepare the halogenated phosphate-phosphite. Steps (A) and (B) can prepare their acid halides. Use of water in step (C) can prepare their acids. For example, 3-((bis(2-chloroethoxy)phosphino)oxy)(2-bromomethyl-2-methylpropyl, 2-bromoethyl, 2-chloroethyl)-phosphorate can be prepared from 2-methyl-2-(hydroxymethyl)-1,3-propanediol; phosphorus trichloride; bromine; and ethylene oxide. Also included is use of the compounds as a hydraulic fluid or flame retardant. For example, polyurethanes can be rendered less flammable with the halogenated phosphate-phosphite flame retardant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.