Electro coat/base coat/clear coat finishes stabilized with soluble and thermally stable benzotriazole UV absorbers

摘要

Soluble and thermally stable benzotriazole UV absorbers typified by those of formula I <IMAGE> (I) where R1 is hydrogen or chloro, R2 is alkyl or -CH2CH2COOR4 where R4 is hydrogen, alkyl or alkyl substituted with hydroxyl, and R3 is alpha -cumyl, provide excellent light stability protection to electro coat, base coat or clear coat finishes. The new soluble, crystalline form of 2-(2-hydroxy-3- alpha -cumyl-5-tert-octylphenyl)-2H-benzotriazole is particularly effective.