Improvements in water-proofing textile materials

Abstract

Abstract Textile materials are waterproofed by treatment, simultaneously or successively in either order, with at least one mixed polymerizate composed of maleic anhydride and another olefinic compound capable of being polymerized, at least one of the components having an aliphatic radicle of at least 10 carbon atoms and with an aliphatic hydrocarbon, fatty alcohol, fatty acid or isocyanate containing at least 10 carbon atoms or an ether of such an alcohol or an ester, anhydride, amide or methylolamide of such a fatty acid. The free acid of the mixed polymerizate may be employed, or a functional derivative of such acid other than the anhydride. An increase in the waterproof effect may be obtained by the simultaneous use of water-soluble aluminium salts, e.g. aluminium formate, acetate or sulphate. A further increase in the water-repellent effect and fastness to creasing may be obtained by application of an initial synthetic aldehyde resinous product or of an aldehyde or substance yielding aldehyde. In examples: (1) artificial silk cr<\>zepe is treated with a methylene chloride solution of paraffin and the mixed polymerizate from maleic acid monomethyl ester and vinyl - dodecyl or -octadecyl ether; (2) cotton fabric, pretreated with lactic acid solution, is impregnated with a carbon tetrachloride solution of stearic acid methylolamide and a mixed polymerizate from maleic anhydride and vinyl-octadecyl ether and finally heated in a drying chest at 140 DEG C.; (3) textile material is treated with an aqueous emulsion of hard paraffin and the mixed polymerizate from maleic acid monomethyl ester and vinyl stearate, dried at a temperature above the melting point of the paraffin, impregnated with a solution of aluminium formate and finally dried; (4) artificial silk material is pretreated with aluminium formate or acetate and then treated as in (1); (5) woollen, silk or artificial silk material is treated with a carbon tetrachloride solution of stearyl isocyanate and a mixed polymerizate of maleic acid mono-octadecyl ester and vinyl-octadecyl ether and finally heated at 100 DEG C.; (6) cotton or artificial silk is treated with a benzine-alcohol solution of the free acid of the mixed polymerizate from maleic anhydride and vinyl-tetradecyl ether and dodecyl isocyanate; (7) woollen, silk or artificial silk is treated with a solution of the mixed polymerizate from maleic acid mono-dodecyl ester and vinyl-dodecyl ether, then with a bath of stearyl - hydroxymethyl pyridinium chloride; (8) cotton or artificial silk is treated with a benzine solution of stearic anhydride and the mixed polymerizate from maleic acid di-tetradecyl ester and vinyl-tetradecyl ether and finally dried at 110 DEG C.; (9) cotton or artificial silk is treated with the pyridinium salt of the free acid of the mixed polymerizate from maleic anhydride and vinyl-stearic acid ester, dried and heated at 110 DEG C. and then treated in a second bath containing stearyl hydroxypyridinium chloride and dried at 80--90 DEG C.; (10) cotton fabric pretreated with lactic acid is impregnated with a solution of stearic acid methylolamide and a mixed polymerizate from maleic acid mono-octadecyl ester and vinyl-ethyl ether; (11) cotton fabric pretreated with lactic acid is impregnated for a short time with a solution of stearic acid methylolamide and a mixed polymerizate from maleic anhydride and vinyl-octadecyl ether, squeezed and dried at 140 DEG C. and is then impregnated with a solution of dimethylol urea containing tartaric acid, centrifuged and heated at 120 DEG C.; (12) viscose artificial silk is impregnated with a solution of octadecyl isocyanate and a mixed polymerizate from maleic acid mono-octadecyl ester and vinyl octadecyl ether, centrifuged, dried at 100 DEG C. and further impregnated with formaldehyde, squeezed and heated to 130 DEG C. Specifications 376,479, 464,860, and 472,613 are referred to.

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