GB1325164A - Process for imparting a soil-repellant and antistatic finish to textile materials - Google Patents

Abstract

1325164 Treating textiles FARBWERKE HOECHST AG 15 Oct 1970 [17 Oct 1969] 49064/70 Heading DIP A process for imparting a soil-repellent finish to textile materials comprises treating the material with an aqueous solution of a mixture of an alkali metal salt of a di-aliphatic C 8-20 ester of orthophosphoric acid, and an alkali metal salt of a di-aliphatic C 8-20 ester of ortho phosphoric acid, and subquently drying the material. The mixture of mono and diesters of orthophosphoric acid can be made by reacting phosphorus pentoxide with a mixture of phosphoric acid mono- and di-aliphatic esters at a molar ratio of less than 1:2, preferably from 1:3 to 1:6, and allowing the mixture of acidic phosphoric esters so obtained to react with an amount of an aliphatic alcohol corresponding to the amount of phosphorus pentoxide used. The orthophosphoric acid esters are generally used in the form of the potassium or lithium salts. The finishing agents are applied to the textiles by for example spraying, padding on one or both sides or by immersing. The finish may be applied either to the final goods or during their manufacture. The mixture of salts of the orthophosphoric acid esters may be applied alone or together with other finishing agents used in aqueous solutions or dispersions, e.g. finishing auxiliaries and binding or fixing agents provided that these are compatible with the anonic phosphoric acid esters. Calculated as a dry film, the amount of finishing agents applied is advantageously from 0.05 to 0.6% by weight, calculated on the weight of the goods. The concentrations of the solutions of the salts of the orthophosphoric acid esters are generally from 3 to 50 g. per litre. The textile materials treated may be made from or contain polyesters, polyamides, polyacrylonitriles, polyolefins or cellulose derivatives. In examples (1) a tufted polyamide pile carpet is sprayed with an aqueous solution of a mixture of potassium salts of mono and di-lauryl orthophosphoric acid esters and dried at 130‹C, (2) a tufted felt carpet having a polyamide/polyester upper fleece, wool/polyamide lower fleece and jute basic fabric is immersed in an aqueous potassium mono/di stearyl orthophosphoric ester salt mixture and dried at 140‹C, (3) a tufted polyacrylonitrile carpet having a glass fibre back is padded with an aqueous solution containing the ester mixture of (1), a self crosslinking butylacrylate / styrene / acrylonitrile / acrylic amide dispersion, and melamine-formaldehyde precondensate and dried at 135‹C, (4) a polyester knitted curtain is padded with an aqueous composition comprising the esters of (1) a styrene/acrylonitrile copolymer and an optical brightener and thermal at 195‹C for 30 seconds and (5) a polyester carylonitrile upholstery fabric is immersed in an aqueous solution of the esters of (1), squeezed and dried at 120‹C.