Patent GB-512664-A (GB)
Title: Process of dyeing and printing
IPC: D06P1/00
Filed: 1938-02-11
Abstract: 512,664. Dyeing textiles &c. ; colouring paper pulp. SOC. OF CHEMICAL INDUSTRY IN BASLE. Feb. 11, 1938, Nos. 4344 and 4345. Convention dates, July 10, 1937, and Feb. 10, 1938. [Classes 2 (iii) and 15 (ii)] In the production of colorations by saponifying on the material water-soluble acyl derivatives of sparingly-soluble dyestuffs which contain in the organic acyl residue a, group lending solubility in water (cf., for example, the acyl derivatives of Specifications 480,358, 482,184 and 505,504), the saponification is effected under such conditions that the watersoluble acyl derivative is not dissolved from the substratum prior to its saponification. Suitable conditions are (a) the use of a saponifying liquid of hydroxyl ion concentration corresponding with those of N/10 to N-solutions of alkali metal hydroxides, the liquid containing at least 10 per cent. of the neutral salt of an alkali metal, e.g., sodium chloride or sodium sulphate, (b) the use of a saponifying liquid containing a neutral salt of an alkaline earth metal, (c) the use of a saponifying liquid containing sufficient alkali metal salt or salts to exert a salting-out action on the acyl derivative, the saponifying agent being itself an alkali metal salt or salts, e.g., an alkali carbonate or phosphate, (d) the use of a saponifying liquid of hydroxyl ion concentration corresponding with those of not more than N/10 solutions of alkali metal hydroxides and comprising several saponifying ingredients one of which is an alkali metal salt having a saponifying action, (e) the use of a saponifying agent in vapour form. In examples, (1) cotton is printed with an aqueous paste containing thiodiglycol, starch-tragacanth thickening, trisodium phosphate and the product of the action of benzoic acid m-sulphochloride on the azo dyestuff, 3-chloroaniline# the anilide of 2:3-hydroxy-naphthoic acid, and the print is dried, steamed, passed at room temperature through a saturated solution of common salt containing per litre 6-7 grams of sodium hydroxide, squeezed, allowed to dry in rolled-up or folded state, rinsed, soured in dilute hydrochloric acid at 70-80‹C., rinsed and soaped to obtain a brilliant orange-red print ; a yellower print is obtained with the use, as dyestuff, of the product of the action of benzoic acid m-sulphochloride (3 mols.) on the condensation product from cyanuric chloride (1 mol.), 1-amino-anthraquinone (2 mols.) and aniline (1 mol.) ; (2) viscose crepe is printed with an aqueous paste containing S-ethylthio-glycollic acid amide, starch-tragacanth thickening, trisodium. phosphate and the product of the action of benzoyl chloride-m-sulphonic acid on the dyestuff, 2:5-dichloramiline# the 2<1>- aniscidide of 2:3-hydroxynaphthoic acid, and the print is dried, steamed, treated at 25‹C. with a saturated solution of common salt containing sodium hydroxide, rinsed, soured, again rinsed and soaped at 70‹C. to obtain a brilliant scarlet print ; (3) viscose satin is printed with, an aqueous paste containing thiodiglycol, urea, starch-tragacanth thickening, trisodium phosphate and the product of the action of benzoic acid-m-sulphochloride on the dyestuff, 4-(41-methyl) phenoxyacetylamino- 2:5-dimethoxyaniline# the 3<1>-nitranilide of 2:3 hydroxynaphthoic acid, and the print is dried, steamed, treated at 25‹C. with an aqueous solution containing barium chloride and sodium hydroxide, rinsed, soured and soaped to obtain an intense fast violet print ; (4) cotton is printed on a two-roller machine with aqueous pastes containing (a) urea, resorcinol, starchtragacanth thickening and the acylated dyestuff of (1) above, (b) urea, sodium formaldehydesulphoxylate, potash thickening (containing wheat starch-tragacanth, British gum, potassium carbonate and glycerol) and tetrabromindigo and the print is dried, steamed, treated at 25‹C. with a saturated solution of common salt containing sodium hydroxide and sodium bichromate, rinsed,. soured and soaped to obtain a fast brilliant orange and blue print ; (5) cotton fabric, printed and steamed as in (1) is passed through an aqueous solution at room temperature containing per litre 200 grams of sodium chloride and 15 grams of sodium hydroxide and finished as in (1) ; (b) viscose crepe is printed with an aqueous paste containing thiodiglycol, urea, starch-tragacanth thickening, trisodium phosphate and the product of the action of benzoyl chloride-msulphonic acid on the dyestuff, 4-(41-methyl) phenoxyacetylamino - 2:5 - diethoxyaniline# the anilide of 2:3-hydroxynaphthoic acid, and the print is dried, steamed, passed through an aqueous solution containing trisodium phosphate and sodium chloride, squeezed, left overnight in rolled-up or folded condition and finished to obtain an intense blue print; (7) an artificial silk fabric, printed and steamed as in (2) is passed at room temperature through a saturated solution of sodium carbonate containing sodium hydroxide, squeezed and finished as in (1) to obtain a brilliant scarlet print ; (8) cotton fabric is printed with an aqueous paste containing thiodiglycol, starchtragacanth thickening and the product of the action of benzoic acid-m-sulphochloride on the dyestuff, monobenzoyl- 2:5 - diammohydro - quinone diethyl ether# the anilide of 2:3- hydroxy-naphthoic acid or on the dyestuff of (1) from 1-aminoanthraquinone and the print is dried, steamed, subjected to a moist atmosphere at 80-100‹C. containing ammonia, rinsed and soaped to obtain an, intense blue or yellow print ; (9) viscose fabric is printed with an aqueous paste containing urea, thiodiglycol, starch-tragacanth thickening and the product of the action of benzoic acid-m-sulphochloride on the azo dyestuff of (2), and the print is dried, steamed, passed through a moist atmosphere at 30-40‹C. or at room temperature containing ammonia, washed and soaped to obtain an intense scarlet print ; (10) cotton fabric is printed with an aqueous paste containing thiodiglycol, starch-tragacanth thickening and the acylated dyestuff of (1) and the print is dried, steamed, passed through an atmosphere' of steam containing ethylenediamine, monodi- or tri-ethylamine, or propylamine, rinsed and soaped to obtain a fast orange print; (11) cotton fabric is printed simultaneously with aqueous pastes containing (a) thiodiglycol, starch-tragacanth thickening and the product of the action of benzoic acid-msulphochloride on the dyestuff, 4:4<1>-dichloro-2- aminodiphenyl ether# the 2<1>-anisidide of 2:3-hydroxynaphthoic acid, (b) urea sodium formaldehydesulphoxylate, potash thickening as in (4) and Cibanone green G and the print is dried, steamed, passed through a moist atmosphere at 30-40‹C. containing ammonia, rinsed, soured, washed and soaped to obtain a fast brilliant green and red print. The Specification as open to inspection under Sect. 91 is not restricted to the treatment of textiles and comprises also an example in which cellulose paper pulp is coloured a fast red by mixing into the aqueous' pulp an aqueous solution of the product of the action of benzoyl cbloride-m-sulphonic acid on the dyestuff, 4:4<1>-dichloro-2-aminodiphenyl ether # the 2<1>- anisidide of 2:3-hydroxynaphthoic acid, together with aqueous solutions of sodium hydroxide and barium chloride, and sizing with aluminium sulphate and resin size. This subject-matter does.not appear in the Specification as accepted.