GB838336A - Colouring cellulosic textiles - Google Patents

Abstract

Cellulosic textile materials are dyed or printed by applying an acid-binding agent in aqueous solution or suspension and simultaneously or subsequently applying an aqueous solution of an anthraquinonoid dyestuff which contains at least one ionogenic solubilizing group and contains at least once an amino or substituted amino group carrying as N-substituent a 1 : 3 : 5-triazine radical containing at least one halogen atom attached to a carbon atom of the triazine ring. Specified acidbinding agents are caustic soda, caustic potash, magnesium oxide, sodium and potassium carbonates and bicarbonates, trisodium phosphate and sodium metasilicate. The acid-binding agent and the dyestuff may be applied in two padding operations or together or successively from a single bath. Alternatively, the acidbinding agent may be padded on to the textile and the dyestuff applied by printing. A subsequent heat or steam treatment is preferably applied. As applied to fabrics of broad width, such as tufted viscose rayon carpets, the fabrics are preferably treated with an aqueous solution or paste containing the dyestuff and the acidbinding agent and maintained at 10-30 DEG C. for at least 10 minutes before washing. The dyebath or paste may contain the usual adjuvants such as sodium chloride, sulphate or alginate, cellulose ethers, urea, starch and locust bean gum. Numerous dyestuffs are specified and numerous examples are given. Specifications 772,030 and 838,335 also are referred to.