Color photographic recording material containing a DIR coupler

US5021331A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Hans Vetter · Kempten (Allgäu), DE
• Heinrich Odenwalder · Leverkusen, DE
• Peter Bergthaller · Bensberg, DE
• Thomas Krüger · Leverkusen, DE

Key dates

• Filing date: May 23, 1990
• Grant date: Jun 4, 1991
• Expiry date: May 23, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/158
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Highly active silver halide development inhibitors are released from DIR couplers corresponding to formula I during color development. Where DIR couplers are used in color photographic silver halide materials, high edge effects and high inter-image effects are obtained. EQU A--(TIME).sub.n --Z I In formula I, PA0 A is the residue of a coupler which couples with the oxidation product of a silver halide developing agent under the conditions of photographic development and, in doing so, releases a group corresponding to the following formula EQU --(TIME).sub.n --Z PA0 TIME is a binding link which together with the group Z (a triazole ring) attached thereto is releases on reaction of the coupler with the oxidation product of a silver halide developing agent and which, in turn, releases the group Z with delay under the development conditions; PA0 n is 0 or 1; PA0 Z is a triazole ring corresponding to one of the following formulae ##STR1## R.sup.1 is alkylthio; R.sup.2 is H, alkyl, alkythio, aryl or a heterocyclic group; at least one of the substituents R.sup.1 and R.sup.2 contains at a distance of 2 to 4 atoms from the triazole ring a group --CO--OR.sup.3, --O--CO--OR.sup.3 or --O--CO--…