Water-insoluble monoazo pyridone dye

US4247456A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Hanswilli von Brachel · Leopoldshöhe, DE
• Ernst Heinrich
• Otto Grawinger · Frankfurt am Main, DE
• Karl Hintermeier · Frankfurt am Main, DE
• Horst Kindler

Key dates

• Filing date: Nov 19, 1976
• Grant date: Jan 27, 1981
• Expiry date: Nov 19, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/3626
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Water-insoluble monoazo dyes of the formula ##STR1## produced by reacting a diazotized amine of the benzene, naphthalene, diphenyl, diphenylmethane or heterocyclic series which is free from water solubilizing groups with the appropriate 6-hydroxy-2-pyridone and the utility thereof for the dyeing and printing of synthetic fabric materials to yellow to red shades having excellent fastness to light and sublimation.