| abstract |
An aqueous polyurethane resin dispersion, the polyurethane resin having a polyalkylene oxide in a side chain thereof and is obtainable by reacting in an organic solvent, a polyisocyanate with a 1,2 or 1,3 polyether diol and with a polymeric diol selected from the group consisting of polyester diol, polyether diol, polycarbonate diol, polyacrylate diol and polyolefin diol and by adding a cationic surfactant or cationic surfactant precursor to the organic solvent. |