GB354443A - Improvements in water proofing textile materials and the like - Google Patents

Abstract

354,443. Waterproofing. JOHNSON, J. Y., 47, Lincoln's Inn Fields, London.- (I. G. Farbenindustrie Akt.-Ges. ; Frankforton-Main, Germany.) May 29, 1930, No. 16627. [Class 140.] Textile materials, yarns, leather and paper are waterproofed by superficially impregnating them with (1) salts of polyvalent metals with watersoluble acid, sulphuric esters of aliphatic, cycloaliphatic or mixed aliphatic-aromatic compounds which contain at least 10 carbon atoms and at least one olefinic double linkage or hydroxyl group, or both, or at least one group which is readily converted into a double linkage or hydroxyl group, such as aldehydes, ketones, alcohols or halogen compounds, or with (2) metal salts of true sulphonic acids of saturated or unsaturated aliphatic or cycloaliphatic compounds containing at least 10 carbon atoms in their molecule. Impregnation may be effected by means of a solution of the metal salts in organic solvents such as pyridine and benzene, or the sulphuric esters, sulphonic acids or their salts may be first applied, for example by slop-padding in aqueous solution, the goods then being passed through a bath containing salts such as aluminium formate or acetate, zinc sulphate or acetate, copper chloride or acetate, ferric chloride or sulphate or iron alum, or a single bath containing both ingredients may be used, in which case protective colloids such as glue, gelatine, albumen, starch and gum-arabic are preferably added to prevent precipitation in a coarse form. The impregnating agents may contain also salts of fatty acids and may be employed in combination with emulsions of fats, waxes and paraffins. Examples describe the treatment of fabrics of wool, cotton, acetate silk and viscose silk with the aluminium salts of the acid sulphuric esters of cetyl alcohol and ethyl hexanol, the copper salt of the acid sulphuric ester of octodecyl alcohol, the copper and aluminium salts of acid acetyl sulphuric ester, the aluminium salts of sulphostearic acid, oleic acid tauride and the sulphonic acid of palmitic acid monobutyl anilide and the aluminium and copper salts of sulphopalmitic acid and of the sulphonation product described in example 1 of Specification 303,281, [Class 2 (iii), Dyes &c.].