Patent GB-522941-A (GB)
Title: Improvements in or relating to the production of printed textile fabric
IPC: D06P1/44
Filed: 1938-10-20
Abstract: 522,941. Printing inks. INTERCHEMICAL CORPORATION. Oct: 20, 1938, Nos. 30367, 30368 and 30369. Convention dates, Nov. 6, 1937, Dec. 31, 1937, and August 2, 1938. [Class 146 (iii)] [Also in Groups XVI and IV] A method of printing textile fabrics consists in wetting the fabric with a volatile liquid, e.g. water, and applying by an ordinary printing operation a lacquer comprising a film forming' binder in a solvent with pigment dispersed therein, the lacquer being substantially immiscible with the volatile liquid and being applied in such quantities as to form small portions adhering to the individual yarns without bridging the spaces between the yarns. The fabric may be wetted with the volatile liquid before being printed with the lacquer or the liquid and lacquer may be' applied together as an emulsion of the lacquer in the liquid. The lacquer is preferably convertible, e.g. by heat, into a form which is insoluble in washing and dry cleaning agents, and has a volume ratio of binder to pigment in excess of 2 to 1. Suitable inks for printing on fabrics pre-wetted with water consist of (1) carbon black and synthetic indigo dispersed in blown soya oil, to which are added cumar resin dissolved in xylol, and kerosine; (2) indanthrene blue dispersed in an alkyd resin consisting of 25 per cent. glycerol phthalate and 75 per cent. soya bean oil, to which are added a urea formaldehyde resin solution consisting of 50 per cent. resin, 20 per cent. xylol and 30 per cent butanol, blown linseed oil, xylol and turpentine substitute, (3) urea resin solution as in the previous example, ming orange pigment, blown soya bean oil, toluol and butanol. Examples of lacquer-in-water emulsions for printing on dry fabrics are prepared as follows:-(a) a lacquer consisting of nitrocellulose wet with 30 per cent. butanol, plasticised with dibutyl phthlate castor oil and glycerol sebacate and dissolved in heryl acetate octyl acetate, xylol and butanol, has mixed therewith copper phthalocyanine pulp producing a water-in-lacquer emulsion. To this emulsion is added water containing sodium lauryl sulphate and sulphonated castor oil and the mixture is then passed through a colloid mill to produce a blue lacquer-in-water emulsion ; (b) cellulose ethyl ether, dibutoxy ethyl phthalate, blown castor oil, heryl alcohol and xylene are mixed with a dispersion of carbon black in water and to the resulting emulsion is added water containing sodium lauryl sulphate, sulphonated castor oil and acetone. The mixture is then passed through a mill to produce a black lacquer-in-water emulsion ; (c) urea resin solution as in example (2) above, blown linseed oil, xylol and toluol, are mixed with titanium dioxide pulp and then ground with water and sodium lauryl sulphate to produce a white lacquer-in-water emulsion. The Specification as open to inspection under Sect. 91 comprises also a method of printing using emulsions of the water-in-lacquer type. This subject-matter does not appear in the Specification as accepted but forms the subject of Specification 523,090.