Halftone gravure printing inks containing pyridone azo dyestuffs

US4739042A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Lorenz · Coburg, DE
• Artur Haus · Leverkusen, DE

Key dates

• Filing date: Aug 4, 1986
• Grant date: Apr 19, 1988
• Expiry date: Aug 4, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S534/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Halftone gravure printing inks containing pyridone azo dyestuffs wherein the dyestuffs are obtained by reacting a pyridone dyestuff of the formula ##STR1## with a dicarboxylic or polycarboxylic acid or a pyridone azo dyestuff of the formula ##STR2## with a dihydroxy or polyhydroxy compound.