| abstract |
Thiazoleazo dyes of the formula <IMAGE> where X is nitrogen or a radical C-R5, R5 being cyano, halogen, alkoxycarbonyl or thiocyanato, R1 is cyano, chlorine, unsubstituted or substituted C1-C6-alkyl, unsubstituted or substituted phenyl, unsubstituted or substituted thienyl, unsubstituted or substituted pyridyl or unsubstituted or substituted alkylthio, alkylsulfinyl or alkylsulfonyl, R2 is unsubstituted or substituted alkyl, cycloalkyl, unsubstituted or substituted phenyl, furyl, unsubstituted or substituted thienyl or pyridyl and R3 and R4 independently of one another are each unsubstituted or substituted alkyl, or R3 and R4, together with the nitrogen atom which links them, form a heterocyclic radical, are used for dyeing textile fibers having good wet fastness and color build-up. |