| abstract |
A 1 ein aromatischer Rest, B 1 Wasserstoff, Alkyl, Cycloalkyl, Aralkyl oder Aryl ist, R 1 ,R 2 und R 3 unabhängig voneinander Alkyl, Cycloalkyl, Aralkyl oder Polyoxyalkylen sind, Z 1 Arylen, X⊖ ein Anion und m 0, 1, 2 oder 3 ist. Hydrazone derivatives of the formula wherein A 1 is an aromatic radical, B 1 is hydrogen, alkyl, cycloalkyl, aralkyl or aryl, R 1 , R 2 and R 3 are independently alkyl, cycloalkyl, aralkyl or polyoxyalkylene, Z 1 is arylene, X⊖ is an anion and m is 0, 1, 2 or 3. n n n The hydrazone derivatives are particularly suitable as UV absorbers in polymer layers. |