Lessening the tendency of cellulosic fabrics to become soiled during washing

摘要

A composition suitable for treating cellulosic fabrics comprises a compound which improves the crease resistance of the fabric and a copolymer of 1-10% by weight of a N-methylolamide of an acrylic acid and 0.5-10% by weight of at least one compound containing in the molecule at least two polymerizable double bonds, the balance of 100% by weight being made up of at least one further polymerizable compound. The N-methylolamide of an acrylic acid may be N-methylolacrylamide or N-methylolmethacrylamide or an ether derivative thereof and suitable compounds containing at least two double bonds are divinyl benzene and its derivatives and substitution products, ethylene glycol diacrylate, butane diol diacrylate or dimethacrylate, hexane diol diacrylate, glycerol triacrylate, vinyl methacrylate, 1,3,5 - triacyl - hexahydrotriazine - (1,3,5) allyl acrylate and methylene bisacrylamide. The further polymerizable compounds making up the copolymer may be methyl, ethyl, propyl or butyl acrylate or methacrylate, acrylonitrile, isopropyl acrylate, N-dibutylacrylamide, ethylhexyl acrylate or vinyl-pyrrolidone. The crease proofing agent may be a methylol compound of urea, ethylene or propylene urea, diphenyl urea, methyl urea, thiourea, dicyandiamide, guanidine, melamine, methylmelamine, phenyl melamine, glyoxal monoureine or diureine, a urethane, polyurethane, lactam, polyamide, triazinone, carboxylic amide or diamide or ether thereof, a methylol compound of a ketone, an acetal, an epoxy compound or a water soluble polymer or copolymer of an amide of an unsaturated carboxylic acid. The composition may be in the form of an aqueous solution or dispersion containing 30-150 g./l. of the crease-resisting agent and 5-100 g./l. of the copolymer and if desired an organic liquid, e.g. ethyl alcohol or glycerol, softeners, water repellants, colouring pigments and an acid condensation catalyst, e.g. magnesium chloride, zinc nitrate, mono-ammonium phosphate, ammonium nitrate and ammonium acetate. ALSO: The tendency of crease proofed cellulosic fabrics to become irreversibly soiled during washing with hot aqueous liquids is reduced by effecting the crease-proofing by a process comprising treating them with a compound which improves the crease resistance of the fabric and with a copolymer of 1-10% by weight of a N-methylolamide of an acrylic acid and 0.5-10% by weight of at least one compound containing in the molecule at least two polymerizable double bonds, the balance of 100% by weight being made up of at least one further polymerizable compound. The N-methylolamide of an acrylic acid may be N-methylolacrylamide or N-methylolmethacrylamide and suitable compounds containing at least two double bonds are divinyl benzene and its derivatives and substitution products, ethylene glycol diacrylate, butane, diol diacrylate or dimethacrylate, hexane diol diacrylate, glycerol triacrylate, vinyl methacrylate, 1,3,5- triacryl-hexahydrotriazine- (1, 3, 5) allylacrylate and methylene bisacrylamide. The further polymerizable compounds making up the copolymer may be methyl, ethyl, propyl or butyl acrylate or methacrylate, acrylonitrile, isopropyl acrylate, N-dibutylacrylamide, ethylhexyl acrylate or vinylpyrrolidone. The crease proofing agent may be a methylol compound of urea, ethylene or propylene urea, diphenyl urea, methyl urea, thiourea, dicyandiamide, guanidine, melamine, methylmelamine, phenyl melamine, glyoxal monoureine or diurein, a urethane, polyurethane, lactam, polyamide, triazinone, carboxylic amide or diamide or ether thereof, a methylol compound of a ketone, an acetol, an epoxy compound or a water soluble polymer or copolymer of an amide of an unsaturated carboxylic acid. The crease resisting agent and copolymer may be applied from an aqueous solution or dispersion containing 30-150 g/1 of the crease resisting agent and 5-100 g/1 of the copolymer and if desired an organic liquid, e.g. ethyl alcohol or glycerol, softeners, water repellants or colouring pigments. Alternatively the crease resisting agent and the copolymer may be applied successively in any sequence. The treating agents may be fixed on the fabrics by the action of an elevated temperature and/or an acid condensation catalyst, e.g. magnesium chloride, zinc nitrate, monoammonium phosphate ammonium nitrate and ammonium acetate. After impregnation and prior to heating the fabric may be calendered on a Schreiner calender. Fabrics comprising cotton, linen, or viscose rayon fibres alone or in admixture with polyamide, polyester, cellulose ester or acrylonitrile polymer fibres may be treated.