Color photographic recording material containing a yellow DIR coupler

US4833070A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Friedrich-Wilhelm Kunitz · Wermelskirchen, DE
• Hans hlschlager · Bensberg, DE
• Heinrich Odenwalder · Leverkusen, DE
• Dirk Hubner · Cologne, DE

Key dates

• Filing date: Aug 28, 1987
• Grant date: May 23, 1989
• Expiry date: Aug 28, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/30535
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Remarkably high interimage and Eberhard effects are obtained when yellow DIR couplers corresponding to formuls I are added to multilayered color photographic recording materials, in particular to the green-sensitive or red-sensitive layers. These couplers can improve the sharpness and color reproduction. ##STR1## R.sup.1 denoted alkyl or aryl, R.sup.2 denotes alkyl with up to 18 carbon atoms, PA0 R.sup.3 denotes halogen, SO.sub.2 --R.sup.6, SO.sub.2 --NR.sup.7 --R.sup.8 or NH--SO.sub.2 --R.sup.6, PA0 R.sup.4 denoted H, alkyl or aryl. PA0 R.sup.5 denotes alkyl, cycloalkyl, alkinyl, aralkyl or aryl, PA0 R.sup.6 denotes alkyl or aryl, PA0 R.sup.7 denotes H or alkyl and PA0 R.sup.8 denoted H, alkyl, aryl, CO--R.sup.6 or ##STR2## and the total number of carbon atoms in R.sup.4 and R.sup.5 is not greater than 11.