Color photographic recording material containing a coupler which releases a photographically active compound

US5200306A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Heinrich Odenwalder · Leverkusen, DE
• Hans Vetter · Kempten (Allgäu), DE
• Peter Bergthaller · Bensberg, DE
• Dirk Hubner · Cologne, DE

Key dates

• Filing date: Mar 22, 1991
• Grant date: Apr 6, 1993
• Expiry date: Mar 22, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/158
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Couplers corresponding to formula I below used in multilayer color photographic recording materials are suitable for the release of photographically active compounds. ##STR1## In formula I above, A represents the residue of a coupler which, as a consequence of a reaction with the oxidation product of a silver halide developer under the photographic development conditions, releases a radical corresponding to the following formula ##STR2## Time represents a bond which, on reaction of the coupler with the oxidation product of a silver halide developer, is released together with the triazole ring attached thereto and, in turn, releases the triazole ring with delay under the development conditions; PA1 n=0, 1 or 2; PA1 R.sup.1 and R.sup.2 represent any substituents, provided the compound of formula II ##STR3## as a whole is a photographically active compound after release.