Disazo dyes containing two carbonylamino groups processes for their preparation and their use

Abstract

Azo dyes of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are unsubstituted or hydroxy-, C.sub.1 -C4-alkoxy- or halogen-substituted C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy; unsubstituted or C.sub.1 -C4-alkyl-, C.sub.1 -C4-alkoxy- or halogen-substituted phenyl or phenoxy; or a radical of the formula --N(R.sub.3)R.sub.4, in which R.sub.3 und R.sub.4 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.2 -C.sub.4 -alkanoyl which is unsubstituted or further substituted in the alkyl part by hydroxyl or C.sub.1 -C.sub.4 -alkoxy, with the proviso that R.sub.1 and R.sub.2 are not simultaneously methyl, produce dyeings with good fastnesses on fibre materials containing nitrogen or containing hydroxyl groups.

Dependencies are inferred from the claim text.