Polymers flameproofed with 1,2-oxaphospholanes
US4113669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Oxo-2-alkoxy-5-dialkylphosphono-1,2-oxaphospholanes of the formula ##STR1## in which R.sub.1 to R.sub.7 are hydrocarbon radicals can be prepared from .alpha.,.beta.-unsaturated ketones and 2 or more moles of a dialkyl phosphite. Obviously .gamma.-ketophosphonates are intermediates of this reaction, as these compounds react with 1 or more moles of dialkyl phosphite in yielding the oxaphospholanes too. Both reactions are promoted by alkaline catalysts. The new oxaphospholane derivatives are considerably stable against thermal decomposition. They are compatible with polymeric materials and can be used as flame protecting agent for plastics and resins, for example, in polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.