Photographic recording material with metal complexable, heterocyclic azo dye

US4396710A · kind A · utility

Assignee

• AFGA-GEVAERT NV · BE

Inventors

• Peter Bergthaller · Bensberg, DE
• Gunther Schenk · Cologne, DE
• Gerhard Wolfrum · Waldershof, DE
• Hans-Volker Runzheimer · Elkhart, US

Key dates

• Filing date: Apr 12, 1982
• Grant date: Aug 2, 1983
• Expiry date: Apr 12, 2002

Classification

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

Abstract

Cyan images may be prepared by the dye diffusion transfer process, using dye-releasers which on development release diffusible dyes capable of forming light-fast cyan metal-dye-complexes particularly with copper or nickel ions. As also the dye-releasers are capable of complexation, cyan images can be prepared not only from the released dyes but also from the dye-releasers ("retained image"). Released dyes and dye-releasers of the present invention contain a chromophor of the following formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represents --H, --F, --Cl, --Br, --CN, --NO.sub.2, --CF.sub.3, --OCF.sub.3, --SCF.sub.3, alkyl, alkoxy, alkylthio, acylamino, alkylsulfonyl, arylsulfonyl, --CO--X or --SO.sub.2 --Y or two adjacent groups R.sup.1 -R.sup.4 together constitute a condensed benzene ring which may contain further substituents; PA0 R.sup.5 represents hydrogen or a substituent having an electron donor character; PA0 R.sup.6 represents hydrogen, halogen or alkyl; PA0 G represents a group capable of chelate formation; PA0 X represents --OH, alkoxy, an amino group optionally substituted by alkyl or aryl, or a cyclic amino gr…