Patent GB-808925-A (GB)
Title: Improvements in or relating to textile printing pastes
IPC: D06P5/00
Filed: 1956-05-28
Abstract: A textile printing paste is prepared by diluting an aqueous dispersion of a pigment, or an aqueous solution or dispersion of a dyestuff, which dispersion or solution also contains borate ions, with an "oil-in-water" carrier emulsion comprising an aqueous dispersion of a starch having a starch content of 1-25 per cent based on the weight of the dispersion, from 5 to 150 parts per 100 parts by weight of the dispersion of a volatile, water-insoluble liquid hydrocarbon and from 0.05 to 10 per cent, based on the total weight of the carrier emulsion, of a surface-active agent having emulsifying properties.  In the case of pigment printing, insolubilization of the starch is effected by incorporating in the emulsion methylated or butylated urea- or melamine formaldehyde resins, oil modified polyester resins, oil modified bisphenolepichlorhydrin condensates, phenol-formaldehyde resins and elastomers such as rubber, polychloroprene, polyvinyl chloride, polyvinylidine chloride, a copolymer of butadiene with styrene or with acrylonitrile or a copolymer of vinyl chloride with vinyl acetate or with vinylidine chloride.  Various pure starches, partially degraded and pregelatinized starches may be employed.  The hydrocarbon may be an aliphatic-, aromatic- or terpene-hydrocarbon.  Suitable surface-active agents, many of which are specified, are water-soluble salts of fatty acids having 10-22 carbon atoms, water-soluble salts of mono-sulphuric acid of esters of fatty alcohols having 10-20 carbon atoms, alkali metal or ammonium alkyl aryl sulphonates and polyoxyethylene derivatives of fatty acids, fatty alcohols or substituted phenols.  In addition to starch other protective colloids, e.g. methyl cellulose, carboxy-methyl cellulose, casein, water-soluble alginates, polyvinyl alcohol, polyvinyl pyrrolidone or dextran may be included in the emulsion.  Numerous examples are given.  Specification 774,079, [Group IV (c)], is referred to.ALSO:A textile printing paste is prepared by diluting an aqueous dispersion of a pigment, or an aqueous solution or dispersion of a dyestuff, which dispersion or solution also contains borate ions, with an "oil-in-water" carrier emulsion comprising an aqueous dispersion of a starch having a starch content of 1-25 per cent based on the weight of the dispersion, from 5 to 150 parts per 100 parts by weight of the dispersion of a volatile, water-insoluble liquid hydrocarbon and from 0.05 to 10 per cent, based on the total weight of the carrier emulsion, of a surface-active agent having emulsifying properties. Various pure starches, partially degraded and pre-gelatinized starches may be employed.  The hydrocarbon may be an aliphatic-, aromatic- or terpene-hydrocarbon.  Suitable surface-active agents, many of which are specified, are water-soluble salts of fatty acids having 10-22 carbon atoms, water-soluble salts of monosulphuric acid of esters of fatty alcohols having 10-20 carbon atoms, alkali metal or ammonium alkyl aryl sulphonates and polyoxyethylene derivatives of fatty acids, fatty alcohols or substituted phenols.  In addition to starch other protective colloids, e.g. methyl cellulose, carboxymethyl cellulose, casein, water-soluble alginates, polyvinyl alcohol, polyvinyl pyrrolidone or dextran may be included in the emulsion.  In the case of pigment printing, insolubilization of the starch is effected by incorporating in the emulsion methylated or butylated urea- or melamine-formaldehyde resins, oil-modified polyester resins, oil-modified bisphenol - epichlorhydrin condensates, phenolformaldehyde resins and elastomers such as rubber, polychloroprene, polyvinyl chloride, polyvinylidene chloride, a copolymer of butadiene with styrene or with acrylonitrile or a copolymer of vinyl chloride with vinyl acetate or with vinylidene chloride.  Numerous examples are given.  Specification 774,079 is referred to.