Patent GB-571274-A (GB)
Title: Manufacture and use of vat dyeing and printing compositions
Filed: 1943-01-07
Abstract: A composition for use in vat dyeing or printing contains a dispersed vat dyestuff and a water-soluble salt of an ester of an acyclic aliphatic sulpho-di- or poly-carboxylic acid with an aliphatic alcohol containing from 4 to 9 carbon atoms, such salt being present in an amount sufficient to improve the brightness or the levelness of the shade especially on wool and other nitrogenous fibres.  Specified salts used are the dicarboxylic ester sulphonates described in Specifications 446,568 and 362,195. In examples: (1) a paste made by mixing an aqueous slurry containing chlorinated 2 : 21-Bzl : Bzl1-dibenzanthrone sodium dinaphthylmethanedisulphonate and sodium diisobutyl-sulphosuccinate with an aqueous thickener containing British gum, dextrinised corn starch, potassium carbonate, sodium formaldehydesulphoxylate and glycerol is printed on viscose rayon pigmented with titanium dioxide and on cotton and the prints are dried, steamed, oxidised, soaped at the boil, rinsed, squeezed and ironed dry; (2), (3) and (4) the ester salt in (1) is replaced by sodium dioctylsulphosuccinate, sodium dihexylsulphosuccinate and sodium diamylsulphossucinate respectively; (5), (6), (7) and (8) the dyestuff in (1), (2), (3) and (4) respectively is replaced by Hydron orange R; (9) a paste made by mixing an aqueous slurry containing Hydron orange R, denatured alcohol and sodium diisobutylsulphosuccinate with an aqueous thickener as in (1) is similarly used for printing; (10), (11) and (12), the ester salt in (9) is replaced by the ester salts of (2), (3) and (4) respectively; (13), (14), (15) and (16), the dyestuff in (1), (2), (3) and (4) respectively is replaced by Indanthrene golden orange G; (17), (18) and (19), a paste made by mixing an aqueous dispersion of Indanthrene red violet RRN, made dispersible as described in Specification 474,827, with an aqueous thickener containing British gum, potassium and sodium carbonates, sodium formaldehydesulphoxylate and glycerol and with sodium diamylsulphosuccinate, sodium dihexylsulphosuccinate and sodium dioctylsulphosuccinate respectively is printed on pigmented viscose rayon and cotton and the prints are dried by hot air, steamed, oxidised, rinsed, soaped at the boil, rinsed and dried; (20) the dyestuff dispersion in (17) is replaced by one of Vat scarlet 2GHN; (21) a paste made by mixing an aqueous dispersion containing Vat scarlet 2GHN, ethylene glycol butyl ether and sodium diamylsulphosuccinate with an aqueous thickener as in (17) is printed on a bleached unmercerised cotton fabric and pigmented viscose rayon crepe and the prints are aged, oxidised, soaped and dried; (22) the ester salt in (21) is replaced by sodium dihexylsulphosuccinate; (23) dispersible Vat scarlet 2GHN as in (20) is milled for 15 hours with sodium diamylsulphosuccinate, with or without cerelose, and the mixture is incorporated with an aqueous thickener as in (17) and similarly used for printing; (24) dispersible Vat pink FF is milled for 21 hours with sodium diisobutyl-sulphosuccinate and the mixture similarly thickened and used for printing; (25) and (26) a paste made by mixing Caledon jade green with an aqueous thickener as in (1) and with sodium diisobutylsulphosuccinate is printed on (25) woollen flannel; (26) a satin fabric having a cellulose acetate warp and a viscose rayon filling, and the prints are aged, oxidised, soaped, rinsed and dried; (27) the ester salt in (1) is replaced by sodium tributylsulphotricarballylate.  The Specification as open to inspection under Sect. 91 comprises also additional examples of the manufacture and use of aqueous printing compositions containing (a) Yellow GC, sodium dinaphthylmethanedisulphonate, sodium diisobutylsulphosuccinate or sodium diamylsulphosuccinate and a thickener as in (1) above; (b) Yellow GC in place of the dyestuffs of (25) or (26) above. This subject-matter does not appear in the Specification as accepted.  Sodium tributylsulphotricarballylate is obtained by treating with sodium bisulphite in aqueous methyl alcohol the ester obtained by reaction of butyl alcohol with aconitic acid in presence of p-toluenesulphonic acid.