Azo dyestuffs from benzene diazo component fused to an aliphatic ring and containing two cyano substituents ortho to the azo group

Abstract

Azo dyestuffs of the formula ##STR1## wherein X.sub.1 and X.sub.2 denote alkyl, cycloalkyl, aralkyl or aryl or conjointly form the remaining members of a fused non-aromatic carbocyclic ring system, X.sub.3 denotes hydrogen, alkyl, aralkyl or aryl and K represents the radical of a coupling component as well as their preparation and use for dyeing and printing synthetic fibre materials.

Dependencies are inferred from the claim text.