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2-(2-HYDROXYPHENYL)-BENZOTRIAZOLES, THEIR USE AS ULTRAVIOLET STABILIZERS AND THEIR PREPARATION
2-(2-HYDROXYPHENYL)-BENZOTRIAZOLES, THEIR USE AS ULTRAVIOLET STABILIZERS AND THEIR PREPARATION
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机译:2-(2-羟基苯甲酰基)-苯并三唑及其作为紫外线稳定剂的用途及其制备方法
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摘要
2-(2-Hydroxyphenyl)-benztriazoles, their use as UVabsorbers and their preparation The novel UV-absorbers are compounds of the formula I IMG (I) in which R1 is, for example, hydrogen, n is one of the numbers 1 or 2 and R2 is an appropriate monovalent or divalent radical, for example -OH or -O-CH2CH2-O-. The UV-absorbers are used in particular for stabilising and improving lacquers and photographic material.
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