Patent GB-385322-A (GB)
Title: Improvements in the manufacture or treatment of textile and other materials
IPC: D06M11/48
Filed: 1931-06-12
Abstract: The fireproof properties of textile materials such as thread, yarns or fabrics of cotton, linen, jute, wool and silk, artificial filaments, threads, yarns, foils, films or sheets of cellulose esters such as cellulose acetate nitrate, nitroacetate, formate, propionate and butyrate, cellulose ethers such as ethyl, butyl and benzyl cellulose, cellulose ester-ethers and regenerated cellulose, and plastic masses, moulding powders or articles made therefrom, are increased by incorporating therein a water-insoluble metallic compound or mixture of metallic compounds which evolves non-inflammable vapours and forms a fused product at temperatures not exceeding red heat.  Suitable insoluble fusible substances and heavy metal ortho-tungstates and boro-tungstates and nickel borate. Fusible compounds which evolve non-inflammable vapours are magnesium ammonium orthophosphate, calcium ammonium di-metaphosphate, zinc ammonium ortho-phosphate, pyrophosphate and tungstate.  Incorporation of the fireproofing agents may be effected by successive treatment with two or more reagents, for example by dipping, spraying, padding, and by means of printing rolls or pin pads.  Examples of such double treatment are calcium chloride followed by ammonium meta-phosphate and zinc chloride or magnesium thiocyanate followed by ammonium dihydrogen phosphate.  Swelling agents for cellulose derivatives such as acetone, acetaldehyde, acetic acid, glycerol, glycol, ethylene glycol mono- or di-acetate or mono-ethyl and methyl ethers, ethylene, chlorhydrin, dioxane, phenol, urea, ethyl lactate, magnesium thiocyanate, zinc chloride, cyclohexanol, methyl cyclohexanol, cyclohexanyl acetate, cyclohexanone, methyl cyclohexanone and ethyl formate, together with diluents or latent solvents such as water and alcohol, may be used before or during the treatment.  In the case of artificial materials the fireproofing agent may be added in finely divided form to the spinning solution as described in Specifications 338,490, [Class 2 (ii), Cellulose &c.], 341,897, 343,949, 346,678, and 346,793.  In wet or dry spinning processes one of the reagents may be added to the spinning solution and the fireproofing agent formed by further treatment at a later stage, for example by suitable addition to the coagulating medium.  The process may be combined with other treatments such as saponification to raise the safe ironing point or a weighting process as described in Specifications 302,777, 306,611, 319,420, [all in Class 2 (ii), Cellulose &c.], and 374,049. Wetting agents such as highly sulphonated aliphatic hydrocarbons, acids or alcohols, sulphonated amides of fatty acids for example the sulphonated ethylene diamides of oleic acid may be applied to improve the "face" or "handle" of the treated materials.ALSO:The fireproof properties of textile materials such as thread, yarns or fabrics of cotton, linen, jute, wool and silk artificial filaments, threads, yarns, foils, films, or sheets of cellulose esters such as cellulose acetate, nitrate, nitroacetate, formate, propionate, and butyrate, cellulose ethers such as ethyl, butyl, and benzyl cellulose, cellulose ester-ethers and regenerated cellulose, and plastic masses, moulding powders or articles made therefrom, are increased by incorporating therein a water-insoluble metallic compound or mixture of metallic compounds which evolves non-inflammable vapours and forms a fused product at temperatures not exceeding red heat.  Suitable insoluble fusible substances are heavy metal ortho-tungstates and boro-tungstates and nickel borate.  Fusible compounds which evolve non-inflammable vapours are magnesium ammonium orthophosphate, calcium ammonium di-metaphosphate, zinc ammonium ortho-phosphate, pyrophosphate, and tungstate.  Incorporation of the fireproofing agents may be effected by successive treatment with two or more reagents, for example by dipping, spraying, padding, and by means of printing rolls or pin pads.  Examples of such double treatment are calcium chloride followed by ammonium metaphosphate and zinc chloride or magnesium thiocyanate followed by ammonium dihydrogen phosphate. Swelling agents for cellulose derivatives such as acetone, acetaldehyde, acetic acid, glycerol, glycol, ethylene glycol, monoor di-acetate or mono-ethyl and methyl ethers, ethylene, chlorhydrin, dioxane, phenol, urea, ethyl lactate, magnesium thiocyanate, zinc chloride, cyclohexanol, methyl cyclohexanol, cyclohexanyl acetate, cyclohexanone, methyl cyclohexanone and ethyl formate, together with diluents or latent solvents such as water and alcohol, may be used before or during the treatment.  In the case of artificial materials the fire-proofing agent may be added in finely divided form to the spinning solution as described in Specifications 338,490, [Class 2 (ii), Cellulose &c.], 341,897, [Group IV], 343,949; 346,678 and 346,793, [both in Group IV].  In wet or dry spinning processes one of the reagents may be added to the spinning solution and the fireproofing agent formed by further treatment at a later stage, for example by suitable addition to the coagulating medium.  The process may be combined with other treatments such as saponification to raise the safe ironing point or a weighting process as described in Specifications 302,775, 306,611, 319,420, [all in Class 2 (ii), Cellulose &c.], and 374,049, [Group IV].  Wetting agents such as highly sulphonated aliphatic hydrocarbon, acids or alcohols, sulphonated amides of fatty acids for example the sulphonated ethylene diamides of oleic acid may be applied to improve the "face" or "handle" of the treated materials.