Adhesives

An aqueous dispersion containing at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, wherein the melting temperature of the at least one semicrystalline polyurethane-polyurea polymer is at least 55° C.,

• wherein the at least one semicrystalline polyurethane-polyurea polymer is formed from
• A(i) at least one crystalline or semicrystalline difunctional polyester polyol having a number-average molecular weight of at least 400 g/mol and a melting temperature of at least 55° C.,
• A(ii) optionally at least one difunctional polyol component having a number-average molecular weight of 62 to 399 g/mol,
• A(iii) at least one isocyanate component,
• A(iv) at least one isocyanate-reactive component bearing at least one ionic or potentially ionic group and
• A(v) optionally further isocyanate-reactive components, and
• wherein the at least one semicrystalline polyurethane-polyurea polymer contains 50% to 95% by weight of constituent A(i), 0% to 10% by weight of constituent A(ii), 4% to 25% by weight of constituent A(iii), 0.5% to 10% by weight of constituent A(iv) and 0% to 30% by weight of constituent A(v), wherein the constituents sum to 100% by weight.