Chelatable 4-thienyl imidazole azo dyes, their use in color photographic recording material

US4524123A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gunther Schenk · Cologne, DE
• Peter Bergthaller · Bensberg, DE
• Holger Heidenreich · Cologne, DE
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: Mar 27, 1984
• Grant date: Jun 18, 1985
• Expiry date: Mar 27, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B45/48
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyes corresponding to the formula (II): ##STR1## wherein G represents a group capable of forming a 5-membered chelate ring and R.sup.5 represents aryl or a thienyl group, combined with metal ions, in particular copper or nickel ions, to form stable azo dye-metal complexes which have advantageous spectral properties. They are therefore particularly suitable for the production of highly light-fast cyan images, e.g. by the Ink-Jet process, in which they may be used directly in the form of colored inks, or by the dye diffusion transfer process, in which they are released image-wise from corresponding dye-releasers in the course of development and transferred to a dye-absorbent layer.