| 摘要 |
<p>Novel valuable diazo dyestuffs of the formula (1), in which a represents a radical of the benzene or napthalene series which is free from sulfonic acid groups and which may be substituted, B stands for the radical of a coupling component of the phenol series, the radical being free from sulfonic acid groups, and R is a hydrogen atom, the methyl, ethyl or .beta.-hydroxyethyl group or the benzene-, p-toluene- or p-chloroben-zene-sulfonyl radical, had been found which are very well suitable for the dyeing and printing of natural and synthetic polyaminde fibers and of polyurethane fibers yielding level dyeings and prints of golden-yellow, yellowish brown and orange shades showing very good fastnesses to wetting and light.</p> |
