| 摘要 |
Novel light stabilizers, i.e. metal complexes of formula I <IMAGE> (I) wherein Me is a doubly or triply positively charged metal ion, w is 2 or 3, p is 1 or 2, q is 1 or 2, r is equal to the number, to half the number or to a quarter of the number of the >N-Y groups present within the bracket q, R1, R2, R3 and R4 independently of one another are alkyl, or R1 and R3 together are alkylene, or R1 and R2 or R3 and R4, independently of one another, together are alkylene or azaalkylene, and, if q is 1, Y is hydrogen, oxyl, optionally substituted alkyl, alkenyl, alkynyl or aralkyl, or, if q is 2, Y is alkylene, alkenylene, alkynylene or arylenedialkylene, s is a value from 0 to 2, X is a divalent organic radical which supplements the N-containing ring to form a 5-7-membered ring, or is two monovalent organic radicals, and L is a singly charged anion of an aliphatic carboxylic acid, of an aminophosphinic or aminophosphonic acid or of an enol of formula II <IMAGE> (II) wherein Z is oxo or optionally substituted imino, R5 is alkyl, alkenyl, cycloalkyl, aralkyl or aryl, R6 is hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl or alkoxycarbonyl, or R5 and R6 together are optionally substituted 1,4-butadi-1,3-enylene or 1,4-butylene, and R7 is optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl, alkoxy or optionally substituted amino.
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