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US 3,979,378 AGranted
Water-soluble azo dyes having a substituted 2-hydroxypyridone (6) coupling component
AssigneeBadische Anilin- & Soda-Fabrik Aktiengesellschaft
InventorsGerhard Gnad, Gunther Lamm, Johannes Dehnert
Life of this patent
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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.
Claims2
The compound of the formula ##SPC20##
The compound of the formula ##SPC21##
Dependencies are inferred from the claim text.