Water-soluble disazo compounds containing the 1-amino-8-hydroxy-3,6-disulfo-naphthalene moiety as a bivalent coupling component and an aniline or naphthylamine compound having a fiber-reactive group, and a 2-sulfo-5-acylamino-aniline

Abstract

Water-soluble disazo compounds of the formula ##STR1## in which D is a benzene ring or a naphthalene ring which can both be substituted by substituents from the group consisting of chlorine, bromine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, carboxy and sulfo, X is the vinyl group or a .beta.-sulfatoethyl group, R is a .beta.-sulfatoethylsulfonyl, 3-(.beta.-chloroethylsulfonyl)-benzoyl, 4-(.beta.-chloroethylsulfonyl)-benzoyl, 3-(.beta.-chloroethylsulfonylmethyl)-benzoyl, 4-(.beta.-chloroethylsulfonylmethyl)-benzoyl,4-(.beta.-chloroethylsulfonyl )-cinnamoyl, 3-(N-methyl-N-.beta.chloroethylsulfonyl)-aminobenzoyl or 4-(N-methyl-N-.beta.-chloroethylsulfonyl)-aminobenzoyl group, m is the number 1 or 2 and M denotes a hydrogen atom or an alkali metal. The disazo compounds are suitable for use as dyes having fiber-reactive properties for dyeing hydroxy- and/or carboxamido-containing fiber material, such as in particular cellulose fiber materials and polyamide fiber materials. These disazo compounds have good solubility and stability in printed pastes and dyebaths; they exhibit a high color strength and a good color buildup; and they produce, in high degrees of fixation, navy to black dyeings and prints with good fastness to, inter alia, light, wash, seawater, chlorinated water, acid, and alkali, and these dyeings and prints have stability toward copper ions.

Dependencies are inferred from the claim text.