| abstract |
Use of compositions containing aqueous polyurethane dispersions comprising polyurethanes obtainable from A1) at least two organic di-or polyisocyanates that are different from each other, A2) at least two polyether poly (tetramethylene glycol) A2a) and A2b)) which they are different from each other, each with the structure (HO- (CH2-CH2-CH2-CH2-O) xH, in which the relevant diol precursors are present with average molecular weights in Mn number from 400 to 8,000 g / mol and the diol with the lower molar mass A2a) has an average molecular weight in number Mn that is 10 to 80% of the average molecular weight in number Mn of the diol with the upper molar mass A2b), A3) optionally hydroxy functional compounds with molecular weights of preferably 62 to 399 g / mol and A4) optionally non-ionic hydrophilizing agents and one or more compounds with amino B functionality), characterized in that, based on the total mass of the polyurethane, they contain less than 20% by weight of the diol precursors with average molecular weights in Mn number from 400 to 8,000 g / mol not corresponding to A2), for the coating or production of outerwear, synthetic leather articles, shoes, upholstery fabrics, interior equipment of cars and sporting goods. |