3-(Dihydrobenzofuran-5-yl)benzofuran-2-ones as stabilizers
US5428177A · kind A · utility
33Cited by
5References
6Claims
0Family size
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Inventor
Key dates
| Filing date | Sep 20, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Sep 20, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/1535
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel compounds of formula (1) ##STR1## wherein R.sub.1 is hydrogen, alkyl or alkaryl, R.sub.2 to R.sub.5 are independently hydrogen, chloro, alkyl phenylalkyl, aryl, cycloalkyl, alkoxy, alkylthio, hydroxy, amino or substituted amino, R.sub.6 is hydrogen, R.sub.7 and R.sub.8 are hydrogen or alkyl, R.sub.9 and R.sub.9 ' are hydrogen, alkyl or phenyl, and R.sub.10 is hydrogen or alkyl, are disclosed as stabilisers for protecting organic materials against thermal, oxidative or light-induced degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.