2-[2-Hydroxy-3,5-di-(.alpha. ,.alpha.-dimethylbenzyl)-phenyl]-2H-benzotriazole and stabilized compositions
First Claim
1. An automotive topcoat finish, lacquer or enamel composition exhibiting retention of gloss and resistance to delamination on weathering which comprises(a) a thermoplastic acrylic resin or a thermoset acrylic resin,(b) 0.1 to 5% by weight of resin of a compound of the formula ##STR27## wherein T1 is hydrogen or chloro, T2 and T3 are independently the group ##STR28## where T4 is hydrogen or lower alkyl, T5 is tert-octyl or the group ##STR29## T6 has the same meaning as T5, with the proviso that one of T5 and T6 must be tert-octyl, but both cannot be tert-octyl, and(c) 0.1 to 5% by weight of resin of a hindered amine light stabilizer.
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Accused Products
Abstract
2-[2-Hydroxy-3,5-di-(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole 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.
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Citations
14 Claims
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1. An automotive topcoat finish, lacquer or enamel composition exhibiting retention of gloss and resistance to delamination on weathering which comprises
(a) a thermoplastic acrylic resin or a thermoset acrylic resin, (b) 0.1 to 5% by weight of resin of a compound of the formula ##STR27## wherein T1 is hydrogen or chloro, T2 and T3 are independently the group ##STR28## where T4 is hydrogen or lower alkyl, T5 is tert-octyl or the group ##STR29## T6 has the same meaning as T5, with the proviso that one of T5 and T6 must be tert-octyl, but both cannot be tert-octyl, and (c) 0.1 to 5% by weight of resin of a hindered amine light stabilizer.
Specification