Trisazo dyes having a 4-(1-amino-3,6-disulfo-8-hydroxy-7-phenylazonaphthyl-2-azo)phenylazo group linked to a coupling component radical

Abstract

Abstract Dyes of the formula <IMAGE> and mixtures thereof, in which R signifies a radical of formula (a), (b), (c), (d), (e), (f), (g) or (h) <IMAGE> (a) in which R1 signifies an amino, anilino or toluidino radical, R2 signifies a hydroxy or amino radical, and either R3 signifies hydrogen, or, where R1 and R2 signify amino, R3 signifies hydrogen, nitro, -SO3M or C1-6 alkyl; <IMAGE> (b) in which R4 signifies a hydroxy, amino, anilino or toluidino radical, preferably a hydroxy or amino radical; <IMAGE> (c) <IMAGE> (d) <IMAGE> (e) <IMAGE> (f) <IMAGE> (g) <IMAGE> (h) in which R5 signifies a hydroxy radical, a C1-6 alkylsulphonyloxy radical, a phenylsulphonyloxy radical, an amino radical, a C1-6 alkylsulphonylamino radical or a phenysulphonylamino radical, preferably a hydroxy radical, R6 signifies a C1-6 alkyl, C1-6 alkoxy, acetyl, carboxyl or carbamoyl radical, R7 signifies hydrogen, an acyl radical or an unsubstituted or substituted C1-6 alkyl, phenyl or naphthyl radical, R' signifies hydrogen, methyl or methoxy, and M signifies hydrogen or an equivalent of a cation, useful for dyeing natural and regenerated cellulose, natural and synthetic polyamides, polyurethanes, basically modified polyolefins and anodized aluminum and particularly for dyeing paper and leather. The obtained dyeings have shades that range from blue and green to deep black and exhibit good fastness to light, wet treatments and sweat. The dyes build-up particularly well on nylon at neutral pH conditions and have good affinity for leather.

Inventors

• 👤 Heinz Wicki

Bibliographic Details