Cyclic phosphorus esters
US3969437A · kind A · utility
22Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1971 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Feb 23, 1991 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2697
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel cyclic phosphorus esters are disclosed having the formula: ##EQU1## where R.sub.9 and R.sub.10 can be the same or different and are selected from the group consisting of hydrogen, lower alkyl, lower hydroxyalkyl, lower haloalkyl and hydroxy with the proviso that no more than one of R.sub.9 and R.sub.10 can be hydroxy. These compounds are useful for the preparation of flame retardant textile finishes as well as for use as polyols for preparing flame retardant polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.