2-(2-HYDROXYPHENYL)-BENZOTRIAZOLES, THEIR USE AS ULTRAVIOLET STABILIZERS AND THEIR PREPARATION

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.