A binder system containing (i) a resin component containing (a) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is based on a fatty acid dimer or trimer or the diols or triols derived therefrom and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (b) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is different from (a) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (c) optionally at least one aliphatic OH-terminated polymer that is different from (a) and (b) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; and (d) optionally at least 2 wt.% of a monomeric chain extender having at least 2 NCO-reactive groups; (ii) a curing component containing at least one polyisocyanate, preferably an aromatic diisocyanate, and/or at least one NCO-terminated polyurethane prepolymer, characterized in that the polyester polyol (b) is a polycarbonate polyol comprising hexanediol and/or dodecanediol as the diol component. (i) a resin component containing (a) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is based on a fatty acid dimer or trimer or the diols or triols derived therefrom and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (b) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is different from (a) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (c) optionally at least one aliphatic OH-terminated polymer that is different from (a) and (b) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; and (d) optionally at least 2 wt.% of a monomeric chain extender having at least 2 NCO-reactive groups; (a) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is based on a fatty acid dimer or trimer or the diols or triols derived therefrom and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (b) at least 10 wt.%, based on the total weight of the resin component, of a polyester polyol that is different from (a) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; (c) optionally at least one aliphatic OH-terminated polymer that is different from (a) and (b) and has a weight-average molecular weight (Mw), as can be obtained by means of gel permeation chromatography, of at least 1,000 g/mol, preferably from 1,000 to 4,000 g/mol; and (d) optionally at least 2 wt.% of a monomeric chain extender having at least 2 NCO-reactive groups; (ii) a curing component containing at least one polyisocyanate, preferably an aromatic diisocyanate, and/or at least one NCO-terminated polyurethane prepolymer,