Photographic recording material with arylazocyanoacetic ester dye releasers

US4393132A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gunther Schenk · Cologne, DE
• Peter Bergthaller · Bensberg, DE
• Gerhard Wolfrum · Waldershof, DE
• Rudolf Stolzenburg · Goldkronach, DE

Key dates

• Filing date: Apr 23, 1982
• Grant date: Jul 12, 1983
• Expiry date: Apr 23, 2002

Classification

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

Abstract

For the production of light-fast yellow images (transfer images and retained images) by the dye diffusion transfer process dye-releasers are useful which on development release diffusible azo dyes which can complex with nickel or copper ions and which in one of their tautomeric forms correspond to the general formula: ##STR1## wherein R.sup.1 represents alkyl, alkenyl or cycloalkyl having up to 8 carbon atoms, PA1 Z represents a radical required for completing a benzene or naphthalene ring; and PA1 L represents a substituent having a group which results from the splitting from a carrier radical.