Improvements in or relating to the colouration of materials

Abstract

Abstract Unspecified types of dyes, dyeing with; cellulose esters or ethers; dyeing; textile materials, treating with liquids; dye preparations; cellulose carboxylates and ethers.--The fastness of colourations, produced with anthraquinone dyestuffs on textile materials or materials made of or containing cellulose or cellulose esters or ethers, including cellulose ester or ether films, filaments, threads or fabrics, is improved by incorporating in the materials, before, during or after their colouration, bases of the general formula-- <FORM:0361362/IV/1> in which R is an aralkyl group, R1 is an aromatic residue, and R2 is hydrogen or an organic residue, such bases taking no part in the production of colouring matter on the materials. The amount of the base incorporated is preferably 0,5-2 per cent based on the weight of the material, and the use of such large amounts as are necessary to prevent slipping, splitting or laddering in woven or knitted fabrics (cf. Specification 280,990, [Class 2 (ii), Cellulose &c.]) is excluded. Specified bases are benzylethylaniline, benzylmethylaniline and their homologues and nuclear substitution products. Other substances capable of improving the fastness, such as the ureas, thioureas, and guanidines of Specification 340,572 or the compounds of Specification 340,541, and/or compounds having an alkaline reaction due to an inorganic base, such as sodium carbonate, borax, disodium hydrogen phosphate, sodium acetate, sodium palmitate or sodium oleate, may be incorporated separately from or simultaneously with the aralkylated aromatic base. The bases may be applied in the form of aqueous solutions of the bases or their salts or in the form of aqueous dispersions produced, for example, by the methods of Specifications 219,349, 224,925, 242,393, 242,711, 269,960, 273,819, 273,820, 322,737, or 323,788, [all in Class 2 (iii), Dyes &c.]. In the application to artificial materials, particularly materials made of or containing cellulose esters or ethers, the base may be incorporated in the spinning solutions used. The invention is particularly applicable to the dyeing of cellulose ester or ether materials with amino, alkylamino or arylamino derivatives of anthraquinone. In an example a cellulose acetate woven fabric is dyed a blue fast to the combined action of light and acid fumes by treatment at 80 DEG C. in a bath containing soap, a dispersion of 1 : 4-di-(methylamino)-anthraquinone in turkey red oil, and a dispersion of benzylethylaniline in turkey red oil, following by rinsing, passing through a solution of borax, and drying. Specification 243,841, [Class 15 (ii), Dyeing, Processes &c. for], also is referred to.

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