Patent GB-1142428-A (GB)
Title: Finishing fibrous material containing or consisting of cellulose
IPC: D06M15/356
Filed: 1967-10-06
Abstract: 1,142,428. Treating cellulosic materials. BADISCHE ANILIN - & SODA - FABRIK A.G. 6 Oct., 1967 [6 Oct., 1966], No. 45794/67. Heading D1P. Fibrous material consisting of or containing cellulose is creaseproofed by impregnating it with a solution or dispersion of a polymeric substance containing units of a cationic monomer, optionally drying it, impregnating it with an aqueous liquor containing at least one non-polymeric substance containing N - methylol groups and/or N - methylol ether groups, at least one acetalising catalyst and at least one water-insoluble substance which is dispersed by means of an anionic surfactant and reacting the N - methylol groups and/or N-methylol ether groups with each other, with other groups of the substances bearing them and/or with the cellulose. The cationic polymer which may be applied as an aqueous solution or dispersion may comprise ethylene imine or a vinyl imidazole, vinyl pyridine or aminoalkyl acrylate or methacrylate which may be copolymerised with acrylonitrile, an acrylic or methacrylic ester, acrylamide, methacrylamide, styrene, a vinyl ester of a low molecular weight carboxylic acid, butadiene, vinylpyrrolidone, N - hydroxymethyl acrylamide or methacrylamide, N - alkoxymethylacrylamide or methacrylamide or an ester of acrylic or methacrylic acid with a polyhydric alcohol having a halogen atom in the α - position to a free hydroxyl group, and may be in the form of its salt with a strong or medium strength inorganic or organic acid having a dissociation constant K greater than 10<SP>-4</SP> or quarternary ammonium salt formed by quaternisation with a low molecular weight alkyl chloride or aralkyl chloride, dialkyl sulphate or ester of a sulphonic acid. The compound containing N - methylol and/or N - methylol ether groups may have the formula in which R<SP>1</SP> and R<SP>3</SP> are hydrogen atoms or atoms or low molecular weight alkyl or alkoxymethyl groups, R<SP>5</SP>, R<SP>7</SP>, R<SP>10</SP> and R<SP>11</SP> are hydrogen atoms or low molecular weight alkyl groups, R<SP>6</SP> and R<SP>8</SP> are hydrogen atoms, hydroxyl groups or low molecular weight alkyl or alkoxyl groups, R<SP>9</SP> is hydrogen atom or a low molecular weight alkyl or hydroxyl-alkyl group, R<SP>13</SP> and R<SP>13</SP> are hydrogen atoms or low molecular weight alkyl or alkoxymethyl groups, A is a divalent aliphatic hydrocarbon radical having 2-8 carbon atoms and Z is 0 or 1, the low molecular weight alkyl, hydroxy alkyl, alkoxyl or alkoxymethyl groups preferably containing 1-4 carbon atoms in the alkyl section, or may be an unetherified or etherified N - methylol compound of melamine, ammeline, ammelide, guanidine, dicyanodiamide, dicyanodiamidine thiourea or acetylenediurea. The catalysts are strong or medium strength acids having a dissociation constant K greater than 10<SP>-4</SP> e.g. hydrochloric, sulphuric, phosphoric, oxalic, glycollic, maleic, monochloroacetic, trichloroacetic, tartaric or citric acid, or latently acid salts, e.g. ammonium chloride, sulphate, phosphate or nitrate, di- (monoethanol ammonium) hydrogen phosphate, ethanol ammonium chloride, 1 - hydroxy - 2 - methyl-propyl-2 ammonium chloride, magnesium, aluminium, zinc or zirconyl chloride or. zince nitrate. The water-insoluble polymeric substance may be polyethylene, a polyamide, a polymer of a low molecular weight acrylic or methacrylic ester which may be copolymerised with acrylamide, methacrylamide, acrylonitrile, vinylacetate, vinyl propionate, butadiene, styrene, N - methyl acrylamide or methacrylamide or an ether thereof with a low molecular weight alcohol, or butane diol diacrylate. Reaction may be effected by drying the impregnated material, optionally storing and making it into garments, and heating it at temperatures above 130‹C, or by allowing it to stand in the wet or swollen condition at room or elevated temperatures. Woven, non-woven, knitted or netted fabrics comprising cotton, linen or viscose rayon fibres alone or in admixture with wool, silk, cellulose ester, polyamide, polyester, polyolefin, acrylonitrile or vinyl chloride polymer fibres, may be treated.