Aqueous Polyurethane Urea Dispersion

An aqueous polyurethane urea dispersion containing a polyurethane urea, wherein said polyurethane urea is obtained by the reaction of a system comprising the following components:

• a. at least one mixture of isocyanates, comprising hexamethylene diisocyanate and isophorone diisocyanate;
• b. at least one polymer polyol;
• c. 0.5 wt %-10 wt % of a monofunctional nonionic hydrophilic compound, relative to a total weight of said polyurethane urea, comprising a compound having an isocyanate group-reactive group and at least one hydrophilic polyether chain;
• and
• d. 0.5 wt %-5 wt % of a potentially anionic or anionic hydrophilic compound, relative to the total weight of said polyurethane urea, comprising a carboxylate salt and/or a sulfonate salt;
• said aqueous polyurethane urea dispersion has a viscosity of 5s-18s, tested with an Anest Iwata NK-2 cup according to Standard JIS K 5600-2-2-1999-02;
• an amount of said polyurethane urea is 30 wt %-50 wt %, relative to the total weight of said aqueous polyurethane urea dispersion.