Phosphazene composition
US3985834A · kind A · utility
5Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1973 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Jun 12, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65812
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A phosphazene composition is prepared by reacting a fully hydrocarboxylated phosphazene with a partially hydrocarboxylated phosphazene under conditions whereby an organic halide is evolved, in which at least one of the fully and partially hydrocarboxylated phosphazenes are prepared by adding an alkali metal hydrocarboxide to a phosphonitrilic halide whereby the final phosphazene composition contains some --P--ONa bonds, as well as --P--O--P--bond configurations. The phosphazene compositions are useful as fire retardants for cellulosics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.