Color photographic recording material containing color couplers

US4529691A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gunter Renner · Bensberg, DE
• Erich Wolff · Solingen, DE
• Friedhelm Sommer · Leverkusen, DE
• Herbert Stark · Kelkheim, DE
• Dieter Stieler · Leverkusen, DE
• Egon Meier · Leverkusen, DE

Key dates

• Filing date: Apr 4, 1984
• Grant date: Jul 16, 1985
• Expiry date: Apr 4, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/30535
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Yellow couplers corresponding to the formula ##STR1## wherein Y represents an aromatic, aliphatic or cycloaliphatic group, PA0 X represents hydrogen or a releasable group, PA0 R.sup.1 represents halogen, and PA0 R.sup.2 and R.sup.3 each represent an alkyl group having 1 to 20 carbon atoms, are readily soluble in oil formers and undergo coupling with a high color yield. They are resistant to heat and moisture and undergo color development to yield stable yellow dyes with an absorption maximum below 450 nm. They have a high absorption capacity in the near UV region and are virtually unaffected by fluctuations in the pH during processing.