Patent GB-592841-A (GB)
Title: Improvements in emulsions suitable for use in colouring textile fabrics
IPC: D06P1/44
Filed: 1942-10-28
Abstract: An oil-in-water emulsion suitable for use in printing or otherwise colouring textile materials is obtained by adding oil or an oil-in-water emulsion to an aqueous phase formed by mixing with water an aqueous dispersion or solution of a colouring matter, a water soluble ether of cellulose and a film forming substance capable of being transformed by heat or oxidation into a substance insoluble in water and of forming with the water-soluble ether of cellulose a translucent film.  The oil is advantageously a cheap hydrocarbon oil of low solvent power for artificial fibres, such as cellulose acetate or vinyl halide acetate copolymer fibres, which may be treated.  The colouring matter may be a water soluble dyestuff or a pigment such as ultra-marine, a phthalocyanine, a vat dye, an azo pigment or a lake. Specified film-forming substances are water-soluble urea-formaldehyde and aminotriazine-formaldehyde condensation products and water-soluble alkyd resins.  In examples (1) a petroleum fraction of boiling range 150-210 DEG C. is stirred into an aqueous paste containing copper phthalocyanine, methyl cellulose, N, N1-di (methoxymethyl)-urea, bentonite and phosphoric acid; the resulting emulsion may be printed on cotton, the print on being dried for 1/2 hour at 50 DEG C. being fast to washing; (2) an oil in water reducing emulsion of a petroleum fraction as in (1) in an aqueous phase containing methyl cellulose, N:N1 -di- (methoxymethyl)-urea and phosphoric acid is stirred into an aqueous paste containing the pigment, 3:31 -dichlorobenzidineacetoacetanilide (2 mols) and N:N1-di-(methoxymethyl)-urea; the resulting emulsion may be used for printing as in (1); (3) a reducing emulsion as in (2) is stirred into an aqueous paste containing copper phthalocyanine, N:N1-di-(methoxymethyl)-urea, hexaethylene glycol maleate and methyl cellulose; the resulting emulsion may be similarly used in printing; (4) an oil-in-water reducing emulsion as in (3) is stirred into an aqueous paste containing copper phthalocyanine, trimethylolmelamine and methyl cellulose; the resulting emulsion may be similarly used in printing.  (5) an oil-in-water reducing emulsion as in (2) is mixed into an aqueous paste containing copper phthalocyanine.  N:N1-di-(b -hydroxyethoxymethyl-urea and methyl cellulose, the resulting emulsion may be printed as in (1), the dried print being, if desired, heated for 1 minute at 120 DEG C. (6) an oil-in-water reducing emulsion of a petroleum fraction of boiling range 155-265 DEG C. in an aqueous phase containing methyl cellulose, trimethylol-melamine, sulphonated castor oil and phosphoric acid is stirred into a mixture containing an aqueous paste of a green pigment obtained by chlorinating copper phthalocyanine, a solution containing N:N1-di-(methoxymethyl)-urea and trimethylol melamine, and methyl cellulose; and (7) a coloured oil-in-water emulsion is prepared by mixing phosphoric acid with colour base comprising the dyesuff 3.31-dichlorobenzidine acetoacetanilide mixed with N:N1-di-(methoxymethyl)-urea, trimethylol melamine and methyl cellulose, and a reducing emulsion prepared by emulsifying petroleum oil of boiling range 155-265 DEG C. with an aqueous solution of trimethylol melamine and high viscosity methyl cellulose.  The Specification as open to inspection under Sect. 91 refers also to the use of other water-soluble hydrophilic colloids than cellulose ethers and to the use of film-forming substances capable p  of being transformed into water-insoluble substances by oxidation.  In an example, liquid aliphatic hydrocarbon is emulsified in a mixture containing polyethylene glycol maleate, oleic acid, triethanolamine and lauryl sulphate, mixed with red iron oxide and printed on pigmented rayon, wool and cellulose acetate.  In another example printing emulsions are prepared by mixing a concentrated colour paste containing copper phthalocyanine, casein modified urea formaldehyde peolymer and methyl cellulose, with the unpigmented acidified oil-in-water emulsion described in (4) above.  In a further example, a stock solution containing di-(methoxymethyl)-urea, trimethylol melamine and low viscosity methyl cellulose is mixed with the acidified reducing emulsion of (7) above, and an oil-modified pentaerythritol.  Printing pastes are prepared by mixing the stock solution with the vat dyestuff 3.31-dichloro-N-dihydro-1, 2, 11, 211-anthraquinoneazine.  This subject-matter does not appear in the Specification as accepted.ALSO:An oil-in-water emulsion suitable for use in printing or otherwise colouring textile materials is obtained by adding oil or an oil-in-water emulsion to an aqueous phase formed by mixing with water an aqueous dispersion or solution of a colouring matter, a water-soluble ether of cellulose and a film-forming substance capable of being transformed by heat or oxidation into a substance insoluble in water and of forming with the water-soluble ether of cellulose a translucent film.  The oil is advantageously a cheap hydrocarbon oil of low solvent power for artificial fibres, such as cellulose acetate or vinyl halide acetate copolymer fibres, which may be treated.  The colouring matter may be a water-soluble dyestuff or a pigment such as ultramarine, a phthalocyanine, a vat dye, an azo pigment or a lake.  Specified film-forming substances are water-soluble urea-formaldehyde and aminotriazine-formaldehyde condensation products and water-soluble alkyd resins.  In examples: (1) a petroleum fraction of boiling range 150-210 DEG  C. is stirred into an aqueous paste containing copper phthalocyanine, methyl cellulose, N,N1-di-(methoxymethyl)-urea, bentonite and phosphoric acid; the resulting emulsion may be printed on cotton, the print on being dried for 1/2 hour at 50 DEG  C. being fast to washing; (2) an oil-in-water reducing emulsion of a petroleum fraction as in (1) in an aqueous phase containing methyl cellulose, N : N1-di-(methoxymethyl)-urea and phosphoric acid is stirred into an aqueous paste containing the pigment, 3 : 31-dichlorobenzidine \sQ acetoacetanilide (2 mols.) and N : N1-di-(methoxymethyl)-urea; the resulting emulsion may be used for printing as in (1); (3) a reducing emulsion as in (2) is stirred into an aqueous paste containing copper phthalocyanine, N : N1-di-(methoxymethyl)-urea, hexaethylene glycol maleate and methyl cellulose; the resulting emulsion may be similarly used in printing; (4) an oil-in-water reducing emulsion as in (3) is stirred into an aqueous paste containing copper phthalocyanine, trimethylol-melamine and methyl cellulose; the resulting emulsion may be similarly used in printing; (5) an oil-in-water reducing emulsion as in (2) is mixed into an aqueous paste containing copper phthalocyanine, N : N1-di-(b -hydroxyethoxymethyl)-urea and methyl cellulose, the resulting emulsion may be printed as in (1), the dried print being, if desired, heated for 1 minute at 120 DEG  C.; (6) an oil-in-water reducing emulsion of a petroleum fraction of boiling range 155-265 DEG  C. in an aqueous phase containing methyl cellulose, trimethylol-melamine, sulphonated castor oil and phosphoric acid is stirred into a mixture containing an aqueous paste of a green pigment obtained by chlorinating copper phthalocyanine, a solution containing N : N1 - di - (methoxy - methyl)-urea and trimethylol melamine, and methyl cellulose; and (7) a coloured oil-in-water emulsion is prepared by mixing phosphoric acid with colour base comprising the dyestuff 3,31-dichlorobenzidine acetoacetanilide mixed with N : N1-di-(methoxymethyl)-urea, trimethylol melamine and methyl cellulose, and a reducing emulsion prepared by emulsifying petroleum oil of boiling range 155-265 DEG C. with an aqueous solution of trimethylol melamine and high viscosity methyl cellulose.  The Specification as open to inspection under Sect. 91 refers also to the use of other water-soluble hydrophilic colloids than cellulose ethers and to the use of film-forming substances capable of being transformed into waterinsoluble substances by oxidation. In an example, liquid aliphatic hydrocarbon is emulsified in a mixture containing polyethylene glycol maleate, oleic acid, triethanolamine and lauryl sulphate, mixed with red iron oxide and printed on pigmented rayon, wool and cellulose acetate.  In another example, printing emulsions are prepared by mixing a concentrated colour paste containing copper phthalocyanine, casein modified urea formaldehyde polymer and methyl cellulose, with the unpigmented acidified oil-in-water emulsion described in (4) above.  In a further example, a stock solution containing di - (methoxymethyl) - urea, trimethylol melamine and low viscosity methyl cellulose is mixed with the acidified reducing emulsion of (7) above, and an oil-modified pentaerythritol.  Printing pastes are prepared by mixing the stock solution with the vat dyestuff 3.31 - dichloro - N - dihydro - 1,2,11,211 - anthraquinoneazine.  This subject-matter does not appear in the Specification as accepted.