Azo compounds from pigments of a heterocyclic-substituted aniline coupled to a 2,6-dihydroxy-4-methyl-3-cyano or -3-carbamoylpyridine

US3941766A · kind A · utility

Assignee

• Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

• Peter Dimroth · Ludwigshafen, DE
• Walter Dammert

Key dates

• Filing date: Jan 7, 1974
• Grant date: Mar 2, 1976
• Expiry date: Jan 7, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/3634
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo pigments having 2,6-dihydroxy-4-methyl-3-cyanopyridine or 2,6-dihydroxy-4-methyl-3-carbamolpyridine as coupling component and a heterocyclic substituted aniline as diazo component. The pigments have the formula ##SPC1## In which PA1 R is cyano or carbamoyl; PA1 A is an unsubstituted or substituted benzene ring; and PA1 B is a heterocyclic ring which is fused with the benzene ring and which contains at least one --NH-- and --CO-- or at least one --NH--CO-- group. Compounds of this formula as pigments are eminently suitable for coloring printing inks, surface coatings and resins.