Photographic material containing a pyridine azo or pyridazine azo cyan dye releasing compound

US4767698A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Peter Bergthaller · Bensberg, DE
• Rudolf Stolzenburg · Goldkronach, DE
• Paul Marx · Corning, US

Key dates

• Filing date: Apr 13, 1987
• Grant date: Aug 30, 1988
• Expiry date: Apr 13, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C8/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Cyan partial color images with increased light fastness and improved stability to moisture and heat may be produced by the dye diffusion process using cyan dyes corresponding to formula I released from dye releasing compounds. ##STR1## In the above formula, Q denotes a group for completing a pyridine or pyridazine ring optionally carrying a condensed aromatic ring; PA1 G denotes OH or NH--SO.sub.2 --R.sup.5 ; PA1 R.sup.1 denotes H or one, two or three substituents; PA1 R.sup.2 denotes H or a group with electron acceptor character preferably situated in an ortho-position to G; PA1 R.sup.3 denotes H, acylamino or a group such as G; PA1 R.sup.4 denotes H, SO.sub.2 --NR.sup.6 --R.sup.7 or NH--SO.sub.2 --R.sup.5 ; PA1 R.sup.5 denotes alkyl, aralkyl, aryl or NR.sup.6 --R.sup.7 ; PA1 R.sup.6, R.sup.7 denote H, alkyl or aralkyl or together form a group for completing a cyclic amino group.