Abstract:
A process for the dyeing or printing of polyamide or polyurethane fibres, wherein at a pH-range between about 8 and 1 the said fibrous materials are A. DYED OR PRINTED AT A TEMPERATURE BETWEEN ABOUT 60*C and about 130*C or B. PADDED AND SUBSEQUENTLY THERMOFIXED AT A TEMPERATURE BETWEEN ABOUT 150*C and about 230*C. with a water-soluble green to olive-green anthraquinone dyestuff of the formula
IN WHICH R1 represents hydrogen, hydroxyl, lower alkyl, lower alkoxy, phenoxy, amino, acetylamino, benzoylamino, benzenesulfonylamine, chlorine or bromine, and R2 represents hydrogen, lower alkyl, lower alkoxy, chlorine, bromine, carboxyl or sulfonic acid group, and n is 0 or 1.
Abstract:
Development of the process of NL 6908266 for producing multi-coloured and shadow effects on polyamides wherein pre-treatment of the polyamide with nat./snth. tannins is effected at a pH of 2-9 and at temps. of 60-120 degrees C in a long aqs. bath, this reserved material mixed with unprepd.material and suitably dyed in an aqs. bath at pH 3-7.