| 摘要 |
2-(Benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoyl-benzyl)phenols of formula (I) are prepared by reacting a Mannich base of a 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazole with a 2-hydroxy-benzophenone. The hybrid products 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. <CHEM> wherein T1 is hydrogen, chloro, alkyl of 1 to 4 carbon atoms or -SO3H, T2 is alkyl of 1 to 12 carbon atoms, E1 is hydrogen, chloro or -OE2, E2 is hydrogen or alkyl of 1 to 18 carbon atoms, E3 is hydrogen, alkyl of 1 to 4 carbon atoms, chloro or -SO3H, E4 is hydrogen, chloro or -OE5, E5 is hydrogen or alkyl of 1 to 18 carbon atoms, and E6 is hydrogen, hydroxyl or carboxy.
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