| abstract |
Disclosed are basic azo dyes, free from sulphonic acid groups, and of formula, < IMAGE > I in which Q signifies an unsubstituted or substituted phenyl or naphthyl radical, R1 signifies hydrogen, unsubstituted or substituted C1-4 alkyl, phenyl or cyclohexyl, Z signifies a ring forming residue, R4 signifies optionally substituted alkyl, alkenyl, alkoxy or cycloalkyl, K signifies a coupling component, A(-) signifies an anion, and X SIGNIFIES 1, 2 OR 3. |