Changes in the crystalline materials mixed dyes, azo, which are stable under the conditions of the dyeing

摘要

P new crystalline changes of azo dyes, which are stable to the dyeing. / p & & p & this is the shapes, beta and of a mixed dye, obtained by coupling of the 2 - cyano - 4 - nitro - aniline diazotised with a mixture of n - n - butyl - n - cyanoethyl - aniline and n - ethyl - n - cyanoethyl - aniline in the respective molar ratio of 50: 40 and 20: 80, followed by heating in water or an organic solvent or a grinding. / p & & p & use in dyeing of cellulose esters and polyesters. / p