Fluorene phosphonites and thiophosphonites as antioxidants for organic materials
US4211731A · kind A · utility
6Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1978 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Sep 11, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/485
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Fluorene phosphonites and thiophosphonites of the formula, ##STR1## in which each R, independently, is alkyl or optionally substituted phenyl, each Y, independently, is oxygen or sulphur, and n is zero or 1, are useful as antioxidants. Organic materials, which are susceptible to the degradative effects of oxygen, are treated with one or more of such compounds e.g. by incorporation into the body of the organic material, in order to be stabilized against such effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.