POLYAZO DYES,THEIR METAL COMPLEX COMPOUNDS,THEIR PRODUCTION AND USE

摘要

Metallisable polyazo dyes for textiles and leather Dyes are of formula: (where R is sulpho-carrying diazotisation residue, n is 1 or 2 and A is opt. alkyl substd.). R is pref. where R2, R3 and R4 are H, NO2, alkyl, alkoxy, or aryl (opt. substd.), hydroxyalkyl, SO3H, COOH, halogen, opt. substd. NH. and B may be further substd. Used for dyeing and printing leather, natural or synthetic polyamides.