Monoazo pyridinol dyes chelated or capable of being chelated with metal ions and their use for image production

US4521506A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Rudolf Stolzenburg · Goldkronach, DE
• Peter Bergthaller · Bensberg, DE
• Gerhard Wolfrum · Waldershof, DE
• Jurgen Strauss · Cologne, DE

Key dates

• Filing date: Jun 5, 1984
• Grant date: Jun 4, 1985
• Expiry date: Jun 5, 2004

Classification

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

Abstract

Azo dyes corresponding to the formula (I): ##STR1## wherein R.sup.1 represents a releasable group, R.sup.2 represents H, halogen or sulphonyl, R.sup.3 and R.sup.4 represent H or groups not capable of chelate formation, and Q represents a group for completing a phenyl or naphthyl group, combine with 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 magenta 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 imagewise from suitable dye-releasers in the course of development and transferred to a dye-receptive layer.