Water-insoluble monoazo pyridine dyes

US3957749A · kind A · utility

Assignee

• Cassella Farbwerke Mainkur Aktiengesellschaft

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: Jun 5, 1972
• Grant date: May 18, 1976
• Expiry date: Jun 5, 1992

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 ##SPC1## 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.