Process for the Manufacture of Bronze-brown to Olive-brown Direct Dyeing Polyazo Colouring Matters.

摘要

23,119. Chemische - Fabrik vorm. Sandoz. Feb. 12, [Convention date]. Tetrakisazo dyes are obtained by coupling with aromatic nitrodiazo compounds of the benzene series in weakly alkaline or fatty acid solution, the trisazo dyes of the general formula p-diamine of the #phenol-o-carboxylic acid # diphenyl series #1 : 8 : 3 : 6-amino@phthol disulpbonic acid-resorcin ; The products dye cotton bronze-brown to olivebrown shades. According to examples, the trisazo dye from benzidine, salicylic acid, 1:8:3:6- acid, and resorcin, is coupled with diazotized p- or m-nitraniline, and the corresponding trisazo dye from o-cresotinic acid is coupled with diazotized m-nitraniline-p-sulphonic acid; p-nitraniline-o-sulphonic acid, and the trisazo dyes derived from tolidine, are also specified as parent materials.