Patent GB-821504-A (GB)
Title: Aqueous emulsion-suspension textile treating compositions
IPC: D06M15/667
Filed: 1955-11-07
Abstract: Textiles are treated to improve their crease-and flame-resistance by impregnating with a composition comprising a powdered phosphorus-containing thermoset polymer containing reactive groups suspended in an aqueous emulsion containing an inert organic liquid immiscible with water, an emulsifying agent and a water-soluble intermediate capable of penetrating the fibre and of reacting with the reactive groups of the polymer to form a nitrogen-containing thermosetting resin, and curing the composition in the textile by heating to 110 DEG  to 170 DEG  C.  The process is applicable to any natural or synthetic organic material in the form of fibres, yarns, threads or fabrics, e.g. cotton, flax, ramie, wool, silk, regenerated cellulose, e.g. viscose rayon, acetate rayon and mercerized cellulosic materials.  The water-soluble intermediates may be further polymerizable polymers, particularly aminoplasts and nitrilo - methylol - phosphorus adducts, or monomeric mixtures of aminoplast-forming compounds with or without phosphorus compounds, e.g. methylol melamine, urea and tetrakis (hydroxymethyl) phosphonium chloride. Suitable phosphorus-containing polymers for the powdered ingredient are : the insolubilized nitrilo - methylol - phosphorus polymers described in Specifications 761,985 and 764,313, [Group IV (a)], and those prepared by analogous reactions of phosphorus compounds with ammonia, hydrazine, hydroxylamine and aromatic amines; insoluble bromine-containing methylol-phosphorus adducts, described in Specification 807,236, [Group IV (a)]; phenolic methylol-phosphorus resins, some being described in Specification 775,325, [Group IV (a)]; alkyd type adducts, described in Specification 764,312, [Group IV (a)]; polymers prepared from polyhalohydrocarbons and unsaturated alcohol-esters of phosphoric acid, described in U.S.A. Specifications 2,686,768 and 2,686,769; brominated polymers of unsaturated phosphates; and polymeric adducts of phosphorus oxychloride and ammonia.  Suitable organic liquids are aliphatic hydrocarbons, including cycloparaffins.ALSO:A textile-treating composition comprises a powdered phosphorus - containing thermoset polymer containing reactive groups suspended in an aqueous emulsion containing an inert organic liquid immiscible with water, an emulsifying agent and a water-soluble intermediate capable of reaction with the reactive groups of the polymer to form a nitrogen-containing thermosetting resin, the intermediate being capable of penetrating the textile fibre.  The emulsion preferably contains 0.2 to 2 parts of powdered polymer for every part of intermediate and at least 0.1 part of phosphorus per part of nitrogen.  Suitable phosphorus-containing polymers are: the insolubilized nitrilo-methylol-phosphorus polymers described in Specifications 761,985 and 764,313, and those prepared by analogous reactions of phosphorus compounds with ammonia, hydrazine, hydroxylamine and aromatic amines; insoluble bromine-containing methylol-phosphorus adducts, described in Specification 807,236; phenolic methylol-phosphorus resins, some such resins being described in Specification 775,325; alkyd type methylol-phosphorus adducts, described in Specification 764,312; polymers prepared from polyhalohydrocarbons and unsaturated alcohol esters of phosphoric acid, described in U.S.A. Specifications 2,686,768 and 2,686,769; brominated polymers of unsaturated esters of phosphoric acid; and polymeric adducts of phosphorus oxychloride and ammonia.  The particle size of the polymers is preferably such as to pass through a screen of 300 meshes to the inch.  The water-soluble intermediates can be further polymerizable polymers or monomers. Examples of the former are aminoplasts and nitrilo - methylol - phosphorus adducts. The monomers may be unreacted mixtures of organic nitrogen compounds with an aldehyde or water-soluble phosphorus compound.  Suitable organic liquids are aliphatic hydrocarbons including cycloparaffins. The usual emulsifying agents are specified.  After impregnation, curing is effected, e.g. by heating to 110 DEG  to 170 DEG  C.  In the Examples: (1) an aqueous emulsion is formed containing THPC, methylol melamine, urea, aliphatic hydrocarbon solvent ("Varsol"), triethanolamine, stearic acid and a long chain alcohol sulphonate, and in it is suspended a powdered polymer prepared from THPC and methylol melamine; (2) similar to (1) except that the intermediate consists solely of methylol melamine; (4) the powdered polymer is prepared from THPC and ammonium hydroxide; (5) the powdered polymer is prepared by heating an aqueous solution of o-bromophenol, THPC and triethanolamine.  Specification 821,503 also is referred to.