Color photographic recording material

US4418143A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Peter Bergthaller · Bensberg, DE
• Gunther Schenk · Cologne, DE
• Gerhard Wolfrum · Waldershof, DE
• Hans-Volker Runzheimer · Elkhart, US
• Holger Heidenreich · Cologne, DE

Key dates

• Filing date: Feb 22, 1982
• Grant date: Nov 29, 1983
• Expiry date: Feb 22, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C8/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyes of formula II are released on development from dye releasers which are associated with a light-sensitive silver halide emulsion layer. The azo dyes are chelatable and form with metal ions blue or cyan dye-metal-complex image dyes. ##STR1## In the formula A.sup.1 and A.sup.2 represent electronegative substituents whose meta-sigma values .sigma..sub.m (according to D. H. McDaniel and H. C. Brown in J. Org. Chem. 23, 420 et seq (1958) conform to at least one of the following three relationships: PA1 1. .sigma..sub.m (A.sup.1), .sigma..sub.m (A.sup.2) +0.33 PA1 2. .sigma..sub.m (A.sup.1) +.sigma..sub.m (A.sup.2) +0.75; PA1 3. .sigma..sub.m (A.sup.1) +0.33 and A.sup.2 represents--SO.sub.2.sup.X PA1 X represents H, --OH, --NH.sub.2, --NH--Y or a cyclic amino group, and PA1 Y represents alkyl, aryl, alkylsulfonyl, arylsulfonyl or acyl PA1 Q represents a group for completing a 2-amino-3-hydroxypyridine ring, a 4,5-diphenylimidazole ring or a 4-hydroxyisoquinoline ring which is attached through the 1-position; and PA1 G represents a group capable of chelate formation.