process for the production of polyurethane coated textile with flaechengebilde,with polyurethane coated textile flaechengebilde and their use in the manufacture of breathable and water repellent equipments.

摘要

Textile flat article is wet-coated with (A) aq. cationic dispersion of a polyurethane with covalently bonded, solubilising cationic gps. then with (B) aq. anionic dispersion of a polyurethane with covalently bonded, solubilising anionic gps., or first with (B) then with (A) (A) and (B) no longer contg. free NCO gps., then opt. treated with hydrophobising agent (I). Wt. ratio (B):(A) is 1:2-2:1, partic. 1:1. (A) and (B) are used in amts. such that the anionic and the cationic covalently bonded, solubilising gps. are in stoichiometrically equiv. amts. (B) and (A) are applied as compact films, or one is applied as compact film then other is applied as foamed layer. (A) and (B) have solids content 10-60, partic. 20-50, wt.%. (A) and (B) have viscosity 10-200,000. partic. 200-100,000, mPa-s, viscosities opt. having been adjusted by dilution with water or addn. of thickening agent. Dried textile material, opt. treated with (I), is coated with 5-50, partic 15-35, g polyurethane per sq. m.