Disperse azo dyes of the 2,6-diaminopyridine series

A dye of the formula ##SPC38##

• where
• D is phenyl substituted by chlorine, bromine, methyl, methoxy, nitro, cyano, methylsulfonyl, ethylsulfonyl, phenylsulfonyl, carbalkoxy of a total of 2 to 5 carbon atoms, carbo-.beta.-alkoxyethoxy, said alkoxy having 1 to 4 carbon atoms, or N,N-dialkyl-substituted sulfamoyl, said alkyl having 1 to 3 carbon atoms;
• phenylazophenyl;
• phenylazophenyl substituted by chlorine, bromine or nitro;
• benzthiazolyl;
• benzthiazolyl substituted by nitro, cyano, methylsulfonyl or ethylsulfonyl;
• benzisothiazolyl substituted by chlorine, bromine, cyano or nitro;
• thiazolyl substituted by cyano or nitro;
• thienyl substituted by methyl, cyano, nitro or carbalkoxy of a total of 2 to 5 carbon atoms;
• or thiadiazolyl substituted by phenyl, methyl, chlorine, bromine, methylmercapto, ethylmercapto or alkoxycarbonylethylmercapto, said alkoxy having 1 to 4 carbon atoms;
• and
• one of the radicals X and Y is alkanoyl of 1 to 8 carbon atoms, benzoyl, NC--CH.sub.2 CO--, ClCH.sub.2 CO--, H.sub.5 C.sub.6 CH.sub.2 CO--, H.sub.5 C.sub.6 OCH.sub.2 CO--, --SO.sub.2 CH.sub.3, --SO.sub.2 C.sub.2 H.sub.5 or SO.sub.2 C.sub.6 H.sub.5 and the other hydrogen;
• alkyl of 1 to 6 carbon atoms;
• alkyl of 2 to 6 carbon atoms substituted by hydroxy, cyano, methoxy, ethoxy, phenoxy, phenoxyethoxy, benzyloxy or phenyl;
• cyclohexyl;
• norbornyl:
• phenyl;
• .beta.-hydroxy-.beta.-phenylethyl;
• or (CH.sub.2).sub.3 (OC.sub.2 H.sub.4).sub.n OR,
• R being alkyl of 1 to 4 carbon atoms or benzyl and n being the integer 1 or 2.