| abstract |
The present invention relates to azo dyes of formula (1), wherein R 1 denotes C 1 -C 12 alkyl which is unsubstituted or substituted by one or more C 1 -C 12 alkoxy groups, hydroxyl groups, amino groups, cyano groups or halogen atoms and which may be interrupted one or more times by the radical -O-, -S-, -NR 4 -, -COO- or –OOC-; R 4 is hydrogen or C 1 -C 12 alkyl; either R 2 is cyano and R 3 is halogen or R 2 is halogen and R 3 is cyano; and Ar represents a carbocyclic or heterocyclic aromatic radical, to the process for the preparation thereof, to mixtures containing said dyes and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fibre materials, more especially textile materials. |