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US 4,278,589 AGranted
2-[2-Hydroxy-3,5-di-(.alpha.,.alpha.-dimethylbenzyl )phenyl]-2H-benzotriazole and stabilized compositions
AssigneeCiba-Geigy Corporation
InventorsMartin Dexter, Roland A. E. Winter
Life of this patent
Estimating the term…
Abstract
2-[2-Hydroxy-3,5-di-(.alpha.,.alpha.-dimethylbenzyl)phenyl]-2H-benzotriazol e exhibits outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the high temperature processing of stabilized compositions. The combination of the benzotriazole UV absorber with a hindered amine light stabilizer is particularly efficacious in protecting thermoset and thermoplastic acrylic resin automotive finishes and enamels.
Claims10
A compound of the formula ##STR27## wherein T.sub.1 is hydrogen or chloro,
- T.sub.5 is tert-octyl or the group ##STR28## where T.sub.4 is hydrogen or lower alkyl.
- T.sub.6 has the same meaning as T.sub.5, with the proviso that one of T.sub.5 and T.sub.6 must be tert-octyl, but both cannot be tert-octyl.
Dependencies are inferred from the claim text.