A coating compound comprising one or several polyurethane dispersions which can be produced by (a) providing one or several polyurethane dispersions, while at least one of the polyurethane dispersions (i) is obtained from the polymerization of NCO-prepolymers containing reaction products of aliphatic and/or cycloaliphatic diisocyanates, macrodiols with a molecular weight of 500 to 10000, 2,2-bis-(hydroxymethyl)- alkan carbonic acids and short-chain diols with a molecular weight of 62 to 400, (ii) exhibits a neutralisation degree in the region of 35 to 65% relating to all H-acid groups of the polyurethane dispersion, (iii) has a solid content in the region of 30 to 50 % in weight relating to the whole weight of the polyurethane dispersion, (iv) has a pH-value in the region of 7.1 to 9.0, (v) has an average molar mass in the region of 20000 to 58000 g/mol and (vi) a polymodal particle size distribution with at least one portion in the region of 50 to 150 nm and at least one portion in the region of 250 to 600 nm and/or at least one portion in the region of 1000 to 3000 nm, (b) adding of a neutralizing agent in amounts from 0.01 to 0.3 mol relating to the basic groups of the neutralising agent per kg of the total formulation and (c) subsequent slow stirring at a temperature between 10 and 30°C over a period of at least 5 days, at which the whole liquid is moved without forming a vortex, whereas the coating compound has a visco-elastic behaviour, whereas in the deformation range between γ = 0.05 and γ = 1 the material functions of the elasticity modulus G' and of the loss modulus G" have an essentially constant gradient and in the deformation range γ > 2 the material functions G' and G" are higher than the material functions G' and G" extrapolated with a constant gradient of the material functions G' and G" from the deformation range between γ = 0.05 and γ = 1 in the deformation range γ > 2, by a factor of 2 to 8, and whereas the coating compound has a linear visco-elastic range in the deformation range between γ = 0.001 and γ = 0.01, in which the material function of the elasticity modulus G' has values twice as big as the material function of the loss modulus G", and has in the deformation range between γ = 0.05 and γ = 0.5 a nonlinear visco-elastic range in which the material functions G' and G" intersect in a range between 50 to 500 Pas. (a) providing one or several polyurethane dispersions, while at least one of the polyurethane dispersions (i) is obtained from the polymerization of NCO-prepolymers containing reaction products of aliphatic and/or cycloaliphatic diisocyanates, macrodiols with a molecular weight of 500 to 10000, 2,2-bis-(hydroxymethyl)- alkan carbonic acids and short-chain diols with a molecular weight of 62 to 400, (ii) exhibits a neutralisation degree in the region of 35 to 65% relating to all H-acid groups of the polyurethane dispersion, (iii) has a solid content in the region of 30 to 50 % in weight relating to the whole weight of the polyurethane dispersion, (iv) has a pH-value in the region of 7.1 to 9.0, (v) has an average molar mass in the region of 20000 to 58000 g/mol and (vi) a polymodal particle size distribution with at least one portion in the region of 50 to 150 nm and at least one portion in the region of 250 to 600 nm and/or at least one portion in the region of 1000 to 3000 nm, (i) is obtained from the polymerization of NCO-prepolymers containing reaction products of aliphatic and/or cycloaliphatic diisocyanates, macrodiols with a molecular weight of 500 to 10000, 2,2-bis-(hydroxymethyl)- alkan carbonic acids and short-chain diols with a molecular weight of 62 to 400, (ii) exhibits a neutralisation degree in the region of 35 to 65% relating to all H-acid groups of the polyurethane dispersion, (iii) has a solid content in the region of 30 to 50 % in weight relating to the whole weight of the polyurethane dispersion, (iv) has a pH-value in the region of 7.1 to 9.0, (v) has an average molar mass in the region of 20000 to 58000 g/mol and (vi) a polymodal particle size distribution with at least one portion in the region of 50 to 150 nm and at least one portion in the region of 250 to 600 nm and/or at least one portion in the region of 1000 to 3000 nm, (b) adding of a neutralizing agent in amounts from 0.01 to 0.3 mol relating to the basic groups of the neutralising agent per kg of the total formulation and (c) subsequent slow stirring at a temperature between 10 and 30°C over a period of at least 5 days, at which the whole liquid is moved without forming a vortex, whereas the coating compound has a visco-elastic behaviour, whereas