Patent GB-732851-A (GB)
Title: Treatment of textile materials
IPC: D06Q1/08
Filed: 1953-02-06
Abstract: A textile fabric is impregnated with an aqueous solution of (1) a water-soluble polymeric material containing a plurality of carboxylic or carboxylic anhydride groups; and (2) a water-soluble or water-dispersible polymeric material containing more than two hydroxyl groups in the molecule, partially drying the fabric, mechanically twisting it so as to change the form and relative disposition of the textile fibres, and simultaneously or subsequently drying and heating until a water-insoluble resinous material is formed thereon.  In a modification fibres, yarns or filaments are impregnated with the aqueous solution, woven to form a textile fabric and then subjected in partially dried state to the above mechanical finishing and other steps.  The mechanical finishing may be calendering, glazing, pleating, crimping and embossing.  The heating may take place at above 250 DEG  F., preferably 290-375 DEG  F.  The textile material, which may be cotton or regenerated cellulose, may after the water-insoluble resinous material has been formed, be treated with an aqueous solution of an alkali metal or other ionizable metal salt.  The impregnating aqueous solution may also contain a water-soluble or dispersible film-forming substance, a softening agent, a delustring agent or a thickening agent.  The material containing a plurality of carboxylic groups may be polyacrylic or polymethacrylic acid or a copolymer of vinyl acetate, a vinyl alkyl ether, or a vinyl alkyl ketone with an unsaturated organic carboxylic acid, e.g. maleic acid, the anhydride thereof or an alkyl half-ester thereof.  The polymer containing more than two hydroxyl groups in the molecule may be polyvinyl alcohol, partially hydrolysed polyvinyl acetate and partially etherified or esterified polyvinyl alcohol.  The additional film-forming material may be casein, zein, starch, gelatine or a condensation product of formaldehyde with urea, thiourea, guanidine, cyanamide, dicyanamide or an aminotriazine.ALSO:An aqueous solution for impregnating textile fabrics comprises (1) a water-soluble polymeric material containing a plurality of carboxylic or carboxylic anhydride groups, and (2) a water-soluble or water-dispersible polymeric material containing more than two hydroxyl groups in the molecule.  Specified under (1) are polyacrylic, polymethacrylic and polyitaconic acids, polyitaconic anhydride, copolymers of vinyl acetate with acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, maleic anhydride, citraconic anhydride, styrene, and methyl acid maleate, or the copolymers of vinyl methyl or ethyl ether or methyl vinyl ketone with such materials.  Specified under (2) are completely or partially hydrolysed polyvinylacetate, and partially etherified or esterified polyvinyl alcohol.  The solutions may also contain a water-soluble or water-dispersible film-forming material such as casein, zein, starch, gelatin or a condensation product of formaldehyde with urea. thiourea, guanidine, cyanamide, dicyanamide or an amino-triazine, a softening agent such as sulphonated tallow, fatty alcohols, or waxes, glycerine or diethylene glycol, a delustering agent such as titanium dioxide, colloidal silica, silicates, talc or diatomaceous earth, or a thickening agent such as gum tragacanth, hydrolysed starch, alginic acid, hydroxymethyl cellulose or degraded gelatin.