Hoechst Aktiengesellschaft

Walter Noll

Fritz Meininger

Ernst Hoyer

Arno Spange

Water-soluble dyestuffs are described which in the acid form possess the formula ##STR1## wherein D is a benzene or naphthalene nucleus, R.sub.1 is linked to D in ortho-position to the azo group and means hydrogen, halogen, lower alkoxy, lower alkyl, carboxy or sulfo, R.sub.2 is hydrogen, halogen, lower alkyl, lower alkoxy or sulfo and X is the vinyl group or a sulfato-, chloro- or thiosulfatoethyl group, A is a bridging member preferably selected from the diphenylene, diphenylsulfone and diphenylamine series, Z and Z.sup.1 each represent a hydroxy or amino group with the proviso that each Z and each Z.sup.1 have the same meaning. These novel dyestuffs are prepared by diazotization and coupling of the corresponding diazo and coupling components in usual manner known in the art. The novel dyestuffs possess a very valuable fiber-reactivity and are suitable for dyeing natural and regenerated cellulose or natural, regenerated or synthetic polyamide fiber materials. They can easily be applied and fixed by application methods usual and known in the art, and yield on these fiber materials dyeings and prints which possess good fastnesses, especially fastnesses to light, to washing, to perspiration and to cross-dyeing. Their fixation degree on the fiber material and correspondingly their tinctorial strength are outstanding.

Water-soluble dyestuffs, processes for their manufacture, their use as

A dyestuff composition for the dyeing or printing of natural or regenerated cellulose fiber materials, consisting of 20 to 70 percent by weight of C.I. Reactive Blue 19 (sodium salt), anthraquinone-2-sulfonic acid (sodium salt), a condensation product of naphthalene-sulfonic acid with formaldehyde (sodium salt), a condensed phosphate (sodium salt), preferably sodiumhexametaphosphate or penta-sodiumtriphosphate, and a dust preventing agent.

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Bad Soden am Taunus, Germany

Walter Noll