5-tert-Octyl-2-(2-hydroxy-3,5-di-alpha-cumylphenyl)-2H-benzotriazole and related 2H-benzotriazoles substituted on the 5-position of the benzo ring by a higher alkyl group such as tert-octyl or dodecyl exhibit 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 above-named compounds exhibit good solubility in common organic solvents, and exhibit very high extinction coefficients.
5-叔丁基-2-(2-羟基-3,5-二α-叔丙基苯基)-2H-苯并三唑及其在苯环的5位被高碳烷基如叔辛基或
十二烷基取代的相关2H-苯并三唑,表现出在保护有机基质免受光引起的恶化方面的杰出功效,同时在稳定组合物高温加工期间不易挥发或渗出。上述化合物在常见有机溶剂中具有良好的溶解度,并表现出非常高的消光系数。