Patent GB-701139-A (GB)
Title: Improvements in the production of pigmented prints and coatings on fibrous material
IPC: D06P1/44
Filed: 1952-01-18
Abstract: Compositions for printing or coating fibrous materials contain as binding agent an aqueous solution or dispersion of a mixture of a polymer with reactive hydrogen atoms and a precondensate for a thermosetting resin; the mixture is then treated at an elevated temperature with a nitrogenous cross-linking agent which reacts by addition to the polymer.  Suitable cross-linking agents are those which contain at least two ethylene imine or isocyanate groups, or their thermolabile addition products.  Potentially acid hardening agents such as ammonium nitrate may be added.  Suitable polymers are those from vinyl alcohol, acrylic acid, chloracrylic acid, methacrylic acid, acrylamide, methacrylamide and vinylpyrrolidone, and interpolymers of these.  Suitable precondensates are methylol derivatives (which may be partly etherified) of urea, melamine and acetylene-diurea, and condensation products from formaldehyde and alkylureas, phenols and alkylphenols.  The binding agent may be dispersed with the aid of an emulsion of a water-insoluble volatile solvent (gasoline, benzene, toluene, xylene, trichlorethylene), with or without a protective colloid such as tragacanth, methylcellulose or an alginate.  Examples show compositions of (1) copper phthalocyanine; ammonia; tragacanth; an interpolymer from butyl acrylate, vinyl chloride and acrylamide; tetramethylolurea; and the reaction product of a long-chain alkyl sulphochloride with ethylene imine; (2) the dyestuff bis-2:4-dichlorphenylazo-acetoacetyl-o-tolidide; a formaldehyde-naphthalenesulphonic acid condensation product; tetramethylol-acetylene -diurea; ammonia; an emulsion of benzine in a dispersion of tragacanth and the interpolymer from butyl acrylate, acrylic acid and acrylamide; the bisulphite adduct of hexamethylene di-isocyanate; and ammonium nitrate.  In each case the mixture is printed on a fabric, dried and heated to bring about the cross-linking reaction.ALSO:Pigment prints and coatings are produced on fibrous material by using as binding agent an aqueous solution or dispersion of a mixture of a polymer with reactive hydrogen atoms and a precondensate for a thermosetting resin; the mixture is then treated at an elevated temperature with a nitrogenous cross-linking agent which reacts by addition to the polymer. Suitable cross-linking agents are those which contain at least two ethylene imine or isocyanate groups, or their thermolabile addition products. Potentially acid hardening agents such as ammonium nitrate may be added.  Suitable polymers are those from vinyl alcohol, acrylic acid, chloracrylic acid, methacrylic acid, acrylamide, methacrylamide and vinyl pyrrolidone, and interpolymers of these.  Suitable precondenstates are methylol derivatives (which may be partly etherified) of urea, melamine and acetylenediurea, and condensation products from formaldehyde and alkylureas, phenols and alkylphenols. The binding agent may be dispersed with the aid of an emulsion of a water-insoluble volatile solvent (gasoline, benzene, toluene, xylene, trichlorethylene), with or without a protective colloid such as tragacanth, methylcellulose or an alginate.  Examples show printing with pastes of (1) copper phthalocyanine; ammonia; tragacanth; an interpolymer from butyl acrylate, vinyl chloride and acrylamide; tetramethylolurea; and the reaction product of a long-chain alkyl sulphochloride with ethylene imine; (2) the dyestuff 2 mols 2 : 4-dichloraniline \sQ acetoacetyl - o - tolidide; a formaldehyde-naphthalenesulphonic acid condensation product; tetramethylol - acetylene - diurea; ammonia; an emulsion of benzene in a dispersion of tragacanth and the interpolymer from butyl acrylate; acrylic acid and acrylamide; the bisulphite adduct of hexamethylene di-isocyanate; and ammonium nitrate.  In each case the fabric after printing is dried and heated to bring about the cross-linking reaction.