Abstract:
Process for dyeing or printing nitrogen containing native or synthetic fibrous materials, such as wool, silk or fibres of polyamide, which comprises the dyeing or printing of the said fibrous materials with a water-soluble dyestuff of the formula
IN WHICH F represents the rest of a monoazo- or 1-amino-4phenyl-amino-anthraquinone-2-sulfonic acid dyestuff, Y represents a direct linkage or one of the groups
OR
Z represents a hydrogen atom or an alkali metal atom or the ammonium group, and n represents the integer 1, 2 or 3, at a temperature between about 20* and about 115* C and at a pH-value between about 4.0 and about 7.5, the dyeings and prints so prepared being distinguished by very good fastness to processing and fastness to wear, such as fastness to wet and fastness to light.
Abstract:
Water-soluble reactive dyes of formula in which n is 0, 1 or 2 are prepared by diazotizing an amine of formula and coupling with a compound of formula and when a hydroxy compound is used the hydroxyl group is esterified with concentrated sulphuric acid or an esterifying agent providing sulphur trioxide in an inert organic solvent. The dyes are used to dye cotton, linen and viscose materials in green-yellow shades.