Patent number: 6221572
Abstract: A color photographic material having a support and at least one light-sensitive silver halide emulsion layer and at least one color coupler associated with the latter, wherein the silver halide emulsion layer contains at least one compound of formula (I)
wherein
m denotes 0, 1, 2, 3 or 4,
n denotes 2, 3, 4, 5 or 6,
R1 denotes a di- to hexavalent group,
R2 denotes alkyl, alkenyl, cycloalkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, acyl, alkoxycarbonyl, aryloxycarbonyl, hydroxy, halogen, cyano, —SO2R5, —SOR5, —CON(R5)R6 or —SO2N(R5)R6,
L1 denotes alkylene, arylene, aralkylene or alkylidene,
L2 denotes
L3, L4 denote a C1-C3 alkylene which is optionally substituted,
R5 denotes alkyl or aryl, and
R6 denotes H or R5, wherein L2 and X are as defined in the specification, is distinguished b improved stability to light.
Type:
Grant
Filed:
May 14, 1998
Date of Patent:
April 24, 2001
Assignee:
Afga-Gevaert Naamloze Vennootschap
Inventors:
Jörg Hagemann, Günter Helling, Heinrich Odenwälder