An aqueous polyurethane dispersion comprising: A. at least one isocyanate terminated polyurethane prepolymer [prepolymer, herein after] prepared by reacting in the presence of at least one pyrrolidone [(b-pyrrolidone, herein after] selected from the group consisting of N-n-butylpyrrolidone, N-isobutylpyrrolidone, N-sec-butylpyrrolidone and N-tert-butylpyrrolidone, a mixture which comprises: (a) at least one polyisocyanate compound (a), (b) at least one polyol compound (b), having a molecular weight M w of 200 to 8000 and a hydroxyl functionality of 1.5 to 6, (c) at least one water dispersible enhancing component having at least one hydrophilic group or potentially hydrophilic group [component (WD H), herein after] and comprising: i. x mmol/kg of at least one water dispersible enhancing compound having at least one anionic hydrophilic group or potentially anionic hydrophilic group [compound (WD HA), herein after], and/or ii. y mmol/kg of at least one water dispersible enhancing compound having at least one non-ionic hydrophilic group or potentially non-ionic hydrophilic group [compound (WD HN) herein after], wherein 200 ⁢ x + 70 ⁢ y x + y < x + y < 560 ⁢ x + 248 ⁢ y x + y and at least one of x or y is different from 0 and all mmol/kg are based on the weight of all the components initially present in the mixture, B. optionally, at least one isocyanate-reactive compound [compound] herein after], different from the polyol compound (b) and different from the component (WD H), having reactive groups chosen among alcoholic hydroxyl groups or primary or secondary amino group; and C. water. A. at least one isocyanate terminated polyurethane prepolymer [prepolymer, herein after] prepared by reacting in the presence of at least one pyrrolidone [(b-pyrrolidone, herein after] selected from the group consisting of N-n-butylpyrrolidone, N-isobutylpyrrolidone, N-sec-butylpyrrolidone and N-tert-butylpyrrolidone, a mixture which comprises: (a) at least one polyisocyanate compound (a), (b) at least one polyol compound (b), having a molecular weight M w of 200 to 8000 and a hydroxyl functionality of 1.5 to 6, (c) at least one water dispersible enhancing component having at least one hydrophilic group or potentially hydrophilic group [component (WD H), herein after] and comprising: i. x mmol/kg of at least one water dispersible enhancing compound having at least one anionic hydrophilic group or potentially anionic hydrophilic group [compound (WD HA), herein after], and/or ii. y mmol/kg of at least one water dispersible enhancing compound having at least one non-ionic hydrophilic group or potentially non-ionic hydrophilic group [compound (WD HN) herein after], wherein 200 ⁢ x + 70 ⁢ y x + y < x + y < 560 ⁢ x + 248 ⁢ y x + y and at least one of x or y is different from 0 and all mmol/kg are based on the weight of all the components initially present in the mixture, (a) at least one polyisocyanate compound (a), (b) at least one polyol compound (b), having a molecular weight M w of 200 to 8000 and a hydroxyl functionality of 1.5 to 6, (c) at least one water dispersible enhancing component having at least one hydrophilic group or potentially hydrophilic group [component (WD H), herein after] and comprising: i. x mmol/kg of at least one water dispersible enhancing compound having at least one anionic hydrophilic group or potentially anionic hydrophilic group [compound (WD HA), herein after], and/or ii. y mmol/kg of at least one water dispersible enhancing compound having at least one non-ionic hydrophilic group or potentially non-ionic hydrophilic group [compound (WD HN) herein after], wherein 200 ⁢ x + 70 ⁢ y x + y < x + y < 560 ⁢ x + 248 ⁢ y x + y and at least one of x or y is different from 0 and all mmol/kg are based on the weight of all the components initially present in the mixture, i. x mmol/kg of at least one water dispersible enhancing compound having at least one anionic hydrophilic group or potentially anionic hydrophilic group [compound (WD HA), herein after], and/or ii. y mmol/kg of at least one water dispersible enhancing compound having at least one non-ionic hydrophilic group or potentially non-ionic hydrophilic group [compound (WD HN) herein after], wherein 200 ⁢ x + 70 ⁢ y x + y < x + y < 560 ⁢ x + 248 ⁢ y x + y and at least one of x or y is different from 0 and all mmol/kg are based on the weight of all the components initially present in the mixture, B. optionally, at least one isocyanate-reactive compound [compound] herein after], different from the polyol compound (b) and different from the component (WD H), having reactive groups chosen among alcoholic hydroxyl groups or primary or secondary amino group; and C. water.