2-(Benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoyl-6-alkoxybenzyl)phenols are prepared by reacting a Mannich base of a 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazole with a 2-hydroxy-4-alkoxybenzophenone. 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.
2-(苯并三唑-2-基)-4-烷基-6-(2-羟基-3-苯甲酰基-6-烷氧基苯基)
酚是通过将2-(2-羟基-5-烷基苯基)-2H-苯并三唑的曼尼希碱与2-羟基-4-烷氧基苯甲酮反应制备而成。这种混合产物在保护有机基质免受光致恶化方面表现出优异的功效,并且在高温下稳定化合物的加工过程中具有良好的抗挥发或渗出的耐性。