Patent · US Expired

Water-soluble azo dyes having a substituted 2-hydroxypyridone (6) coupling component

US3979378A · kind A · utility

11Cited by

3References

2Claims

0Family size

Assignee

Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

Gerhard Gnad · Keltern, DE
Gunther Lamm · Haßloch, DE
Johannes Dehnert · Ludwigshafen, DE

Key dates

Filing date	Jan 27, 1971
Grant date	Sep 7, 1976
Priority date	—
Expiry date	Jan 27, 1991

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B35/185
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Azo dyes containing sulfonic or carboxylic acid groups and having a substituted 2-hydroxypyridone-(6) as coupling component. The dyes are particularly valuable for dyeing natural or synthetic polyamides.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.