Process for preparation of new dyes bisazo, process for coloring cellulose textile materials.With these dyes and textile materials celulosicos colored according as the process

摘要

1387925 Reactive disazo dyestuffs IMPERIAL CHEMICAL INDUSTRIES Ltd 4 May 1973 [24 May 1972] 24454/72 Heading C4P [Also in Division D1] The dyestuffs of the formula (wherein one of A and A 1 is H and the other is SO 3 H) are prepared by coupling 2 moles of diazotized 4 - nitroaniline - 2 - sulphonic acid or 4 - acetylaminoaniline - 2 - sulphonic acid with one mole of 1,8-aminonaphthol-3,6-disulphonic acid, reducing or hydrolysing the product, and then condensing 1 mole of the resulting product with 2 moles of cyanuric chloride which is also condensed with 2 moles of sulphanilic or metanilic acid. The dyestuffs give dark green shades on cellulosic textiles. Specification 876,923 is referred to.