Color photographic recording material containing a yellow DIR coupler

US4840880A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

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

Key dates

• Filing date: Jul 20, 1987
• Grant date: Jun 20, 1989
• Expiry date: Jul 20, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

High interimage effects and edge effects can be obtained in multilayer color photographic recording materials if yellow DIR couplers of formula I are used therein, particularly if used in green sensitized or red sensitized layers. Sharpness and color reproduction are substantially improved. ##STR1## wherein R.sup.1 denotes a straight chained or branched alkyl group with up to 18 carbon atoms; PA0 R.sup.2, R.sup.3 denote identical or different alkyl groups with up to 18 carbon atoms; PA0 R.sup.4 denotes H, halogen, alkyl with up to 6 carbon atoms or alkoxy with up to 6 carbon atoms; PA0 R.sup.5 denotes H or alkyl with up to 9 carbon atoms; and PA0 R.sup.6 denotes a saturated or unsaturated aliphatic group with up to 10 carbon atoms, the total number of carbon atoms in R.sup.5 and R.sup.6 being not less than 5 and not greater than 10.