申请人:CIBA-GEIGY AG
公开号:EP0337942A1
公开(公告)日:1989-10-18
Liquid substituted 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and/or realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 40 carbon atoms in the presence of an acid catalyst at 100 - 200°C. The liquid mixtures 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.
液态取代的 2H 苯并三唑混合物是在 100 - 200°C 下,在酸催化剂存在下,通过 2-(2-羟基-5-烷基苯基)-2H-苯并三唑或 2-(2-羟基-3,5-二烷基苯基)-2H-苯并三唑与 8 - 40 个碳原子的直链或支链烯烃进行烷基化并同时进行脱烷基化、破碎和/或再烷基化而制备的。这种液态混合物在保护有机基质免受光引起的劣化方面表现出卓越的功效,并且在高温下加工稳定组合物时,具有良好的抗挥发或抗渗出性。