Phosphonous and thiophosphonous acid ethers as stabilizers for organic materials
US4107138A · kind A · utility
6Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1975 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/925
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Organic materials are stabilized against the effects of heat, light or oxygen by addition of a compound of the formula ##STR1## WHEREIN X is --CH.sub.2 --, --O-- or -- S--, PA1 Y.sub.1, y.sub.2, y.sub.3 and Y.sub.4 are --O-- or --S--, PA1 R.sub.1, r.sub.2, r.sub.3 and R.sub.4 are hydrogen or hydrocarbon radicals PA1 n is 0 or 1 PA1 And rings A and B may be further substituted by 1 or 2 alkyl groups Or an inorganic salt of such a compound in which any of R.sub.1 -R.sub.4 are hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.