Process for the dyeing of synthetic textile material

摘要

A process for dyeing synthetic textile material in a halogenated hydrocarbons solvent by the exhaust process, comprising the use, for dyeing, of azopyridone dyestuffs of formula I (I) wherein R1 and R2 each independently represent hydrogen, or an optionally substituted lower alkyl, lower alkenyl, cycloalky or aryl radical, or R1 and R2 form together with the nitrogen atom binding them, optionally with the inclusion of a further hetero atom, a non-aromatic 5- or 6-membered hetero ring, X represents halogen, the cyano or nitro group, Y represents hydrogen, or a lower alkyl group optionally substituted by the hydroxyl or cyano group, and Z represents -CO- or -SO2-.