Liquid substituted 2H-benzotriazole mixtures, stabilized compositions
US5240975A · kind A · utility
11Cited by
20References
6Claims
0Family size
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Key dates
| Filing date | Dec 4, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Dec 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/106
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Liquid substituted 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 30 carbon atoms in the presence of an acid catalyst at 100.degree.-200.degree. C. The liquid mixtures exhibit outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.