Yellow azo dyes for polyamides, cellulose - acetate, paper leather, etc

摘要

Yellow and yellow-green azo dyes carrying sulphonic acid gps. which dye natural and synthetic polyamides natural and regenerated cellulose fibres, polyurethane basically-modified polypropylenes and also paper and leather wet-, light- and sub-fast shades, have the formula (wherein R is the radical of an opt. substd. diazo component; R1 is H, carboxyl, opt, substd. hydrocarbon or acyl; R2 is H, OH, alkyl, alkoxy, aryloxy or cycloalkyloxy opt. substd. providing that the radical R does not carry a metallisable radical in pos. 0- with respect to the N=N gp).