| abstract |
Azo dispersion dyes of formula (I) are claimed in which R1 is H opt. substd. alkyl or phenyl, -COR3, -SO2R3 or -CONR4R'4, R2 and R'2 are H, CN, NO2, COR'3 or SO2R3, R3 is opt. substd. alkyl or phenyl, alkoxy or phenoxy. R'3 is OH or as for R3, R4 is H, alkyl or phenyl, R'4 is H or alkyl and K is the residue of a coupling component of the benzene naphthalene or heterocyclic series or a cpd. with an activated methylene gp, and the mol. is free from sulphonic acid gps.The (I) are made by coupling the diazonium deriv. of a cpd. (II) with a cpd. H-K.The dyes (I) can be applied from aq. dispersion to textile materials e.g. of linear aromatic polyesters, cellulose 2 1/2 and 3-acetate and synthetic polyamides to give fast yellow, red, orange, violet etc. shades with excellent resistance to light, thermal fixing, sublimation and pleating. |