Patent GB-644390-A (GB)
Title: Improvements in or relating to textile-printing compositions
Filed: 1947-07-16
Abstract: A textile-printing composition comprises an emulsion, the inner phase being an aqueous dyestuff solution and the outer a solution of rubber (natural or synthetic) in a water-immiscible organic solvent, together with one or more additional film-forming agents, e.g. cellulose esters (nitrate, acetate), cellulose ethers (benzyl, ethyl), water-insoluble organic solvent soluble thermosetting resins (alkyd, ureaformaldehyde, coumarone-indene), bodied oils, natural resins and ester gums.  The total amount of film-forming substance is not more than 5 per cent of the whole composition and is preferably 2 per cent or less.  An emulsifying agent such as a heavy metal soap may also be present.  In the examples: (1) a concentrate is made of rubber-latex, ethyl cellulose, butanol and hydrocarbons; this is diluted with hydrocarbons and the aqueous dyestuff added; (2) a hydrocarbon solution of an alkyd resin, milled rubber and linseed oil is mixed with aqueous sodium chloride containing sulphonated tannin and acetic acid to give a water-in-oil emulsion concentrate, which is then diluted with a hydrocarbon and the dyestuff solution added; (3) milled rubber in example (2) is replaced by rubber latex; (4) polychloroprene is used instead of natural rubber in example (2). Specification 524,803 is referred to.ALSO:A textile-printing composition comprises an emulsion, the inner phase being an aqueous dyestuff solution and the outer a solution of a plurality of film-forming substances in a water-immiscible organic solvent; one of the film-forming substances is natural or synthetic rubber (e.g. polychloroprene, polyisobutylene) and the total amount of film-forming substance is not more than 5 per cent of the whole composition (preferably 2 per cent or less).  The other film-forming substances may be water-insoluble organic solvent soluble thermosetting resins (e.g. alkyd, urea-formaldehyde, coumarone-indene), bodied oils, natural resins and ester gums, cellulose esters (e.g. nitrate, acetate) or cellulose ethers (e.g. benzyl, ethyl).  An emulsifying agent such as a heavy metal soap may also be present.  In the examples: (1) a concentrate is made of rubber-latex, ethyl cellulose, butanol and hydrocarbons; this is diluted with hydrocarbons and an aqueous dyestuff added, especially alkaline undeveloped colours, e.g. leuco-vat dyes and azoic components; (2) a hydrocarbon solution of an alkyd resin, milled rubber and linseed oil is mixed with aqueous sodium chloride containing sulphonated tannin and acetic acid to give a water-in-oil emulsion concentrate, which is then diluted with a hydrocarbon and the dyestuff solution added; this concentrate is suitable for use with acid solutions of dyestuffs, e.g. Variamine Blue RT; (3) milled rubber in example (2) is replaced by rubber latex; (4) polychloroprene is used instead of natural rubber in example (2). Other types of dyestuffs may be used, e.g. direct, mordant. Specification 524,803 is referred to.ALSO:A textile-printing composition comprises an emulsion, the inner phase being an aqueous dyestuff solution and the outer a solution of a plurality of film-forming substances in a water-immiscible organic solvent; one of the film-forming substances is natural or synthetic rubber (e.g. polychloroprene, polyisobutylene), and the total amount of film-forming substance is not more than 5 per cent of the whole composition (preferably 2 per cent or less).  The other film-forming substances may be water-insoluble organic solvent soluble thermosetting resins (e.g. alkyd, urea - formaldehyde, coumarone-indene), bodied oils, natural resins and ester gums, cellulose esters (e.g. nitrate, acetate) or cellulose ethers (e.g. benzyl, ethyl).  An emulsifying agent such as a heavy metal soap may also be present.  In the examples: (1) a concentrate is made of rubber-latex, ethyl cellulose, butanol and hydrocarbons; this is diluted with hydrocarbons and the aqueous dyestuff added; (2) a hydrocarbon solution of an alkyd resin, milled rubber and linseed oil is mixed with aqueous sodium chloride containing sulphonated tannin and acetic acid to give a water-in-oil emulsion concentrate, which is then diluted with a hydrocarbon and the dyestuff solution added; (3) milled rubber in example (2) is replaced by rubber latex; (4) polychloroprene is used instead of natural rubber in example (2). Specification 524,803, [Group IV (a)], is referred to.