Patent GB-1175712-A (GB)
Title: Process for Providing Fibrous Materials with an Antistatic Finish
IPC: D06M13/175
Filed: 1967-03-28
Abstract: 1,175,712. Coated textiles. FARBWERKE HOECHST A.G. 28 March, 1967 [26 March, 1966], No. 13967/67. Heading B2E. [Also in Divisions C3 and D1] Textile materials, e.g. of polyester, polyamide, polyacrylonitrile, polyolefin, polyvinyl chloride, polyvinyl alcohol and cellulose acetate fibres, are rendered antistatic by treating them with a solution containing an aliphatic hydroxy compound which contains at least two alcoholic hydroxy groups in the molecule and which is completely or partially vinylated and on average contains more than one vinyl group per molecule and, if desired, an aliphatic hydroxy compound containing at least two alcoholic hydroxy groups in the molecule, at least one of these compounds containing a polyethylene glycol ether radical in the molecule and at least one of these compounds containing at least three reactive groups in the form of vinyl ether groups and/or hydroxy groups, evaporating the solvent and effecting cross linking in the presence of an acid catalyst if required at a raised temperature. The completely or partially vinylated aliphatic hydroxy compounds used may be those obtained by the vinylation of glycerol, diglycerol, tetraglycerol, pentaerythrol, mannite or polyvinyl alcohol or addition products thereof with 3-30 mols of ethylene oxide per hydroxy group of the hydroxy compound, and the aliphatic hydroxy compounds containing at least two alcoholic hydroxy groups in the molecule which may be used together with the vinylated compounds may be any of the hydroxy compounds indicated or their addition products with ethylene oxide. The catalyst which may be applied to the textile material in the form of a solution or dispersion prior to, simultaneously with or after the application of the vinylated hydroxy compounds and hydroxy compounds may be a compound forming an acid at elevated temperatures after evaporation of the solvent, e.g. di- or tri-ammonium phosphate, diammonium sulphate or N-diethanoldichloroacetamide, and prevention of reaction prior to evaporation of the solvent may be effected by the addition to the treating solution of sodium hydroxide or triethanolamine. Alternatively after removal of the solvent the textile material may be exposed at room temperature or at temperature of up to 200‹C for up to 15 minutes to gases or vapours which yield acids on contact with moisture, e.g. sulphur dioxide, boron trifluoride-alkyl etherate vapours, hydrogen chloride or hydrogen bromide which may be diluted with air or nitrogen. The vinylated compound and aliphatic hydroxy compound may be applied to the textile material as a solution in benzene, toluene, methyl chloride, chloroform, carbon tetrachloride, dimethyl or diisopropyl ether, acetone, methyl ethyl ketone, acetonitrile, methanol, ethanol, isopropanol, tetrahydrofuran or water and after evaporation of the solvent heating of the textile material to effect cross linking when using a compound producing an acid at elevated temperature may be effected at 110‹- 200‹C for 5 seconds to 30 minutes. The acid catalyst may subsequently be removed by washing with water or treating the material with gaseous ammonia. If during use the textile materials take up dirt the finish may be removed by treatment of the materials with acetic or hydrochloric acid.