Liquid substituted 2H-benzotriazole mixtures, stabilized compositions and processes for preparing the liquid mixtures
US4973701A · kind A · utility
21Cited by
19References
23Claims
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Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/8155
- 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.