Cationic hydrazone derivatives, processes for their preparation and their use

摘要

Hydrazone derivatives of the formula in which A1 is an aromatic radical, B1 is hydrogen, alkyl, cycloalkyl, aralkyl or aryl, R1, R2 and R3 independently of one another are alkyl, cycloalkyl, aralkyl or polyoxyalkylene, Z1 is arylene, X(-) is an anion and m is 0, 1, 2 or 3. The hydrazone derivatives are suitable as UV absorbers, especially in polymer coatings.