Use of an aqueous dispersion containing a mixture of A) an aqueous polyurethane or polyurethane-urea dispersion containing I. a polymer A) formed from I (i). at least one difunctional aliphatic polyester polyol having a molecular weight of 400 to 5000 g/mol, I (ii). at least one mixture of hexamethylene diisocyanate and 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), and I (iii). at least one mixture of two or more aminic chain extenders, wherein at least one compound bears an ionic group, and the polymer A) after drying is semicrystalline or crystalline with a glass transition at a glass transition temperature Tg of between -65°C and -40°C, and B) an aqueous polyurethane or polyurethane-urea dispersion which differs from A) and contains II. a polymer B) formed from II (i). at least one difunctional aromatic polyester polyol having a molecular weight of 400 to 5000 g/mol, II (ii). at least one difunctional polyol component having a molecular weight of 62 to 399, II (iii). at least one aliphatic diisocyanate and II (iv). at least one aminic chain extender having an ionic group, wherein the polymer B) after drying is amorphous with a glass transition at a glass transition temperature Tg of between -15°C and +10°C; and wherein the mixture contains 34.8% to 90.2% by weight of polymer A) and 9.8% to 65.2% by weight of polymer B), based on the sum total of polymers A) and B), for the adhesive bonding of foam substrates by the spray coagulation process, wherein the glass transition temperature Tg is determined by means of DSC as defined in the description. A) an aqueous polyurethane or polyurethane-urea dispersion containing I. a polymer A) formed from I (i). at least one difunctional aliphatic polyester polyol having a molecular weight of 400 to 5000 g/mol, I (ii). at least one mixture of hexamethylene diisocyanate and 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), and I (iii). at least one mixture of two or more aminic chain extenders, wherein at least one compound bears an ionic group, and the polymer A) after drying is semicrystalline or crystalline with a glass transition at a glass transition temperature Tg of between -65°C and -40°C, and I. a polymer A) formed from I (i). at least one difunctional aliphatic polyester polyol having a molecular weight of 400 to 5000 g/mol, I (ii). at least one mixture of hexamethylene diisocyanate and 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), and I (iii). at least one mixture of two or more aminic chain extenders, wherein at least one compound bears an ionic group, and the polymer A) after drying is semicrystalline or crystalline with a glass transition at a glass transition temperature Tg of between -65°C and -40°C, and I (i). at least one difunctional aliphatic polyester polyol having a molecular weight of 400 to 5000 g/mol, I (ii). at least one mixture of hexamethylene diisocyanate and 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), and I (iii). at least one mixture of two or more aminic chain extenders, wherein at least one compound bears an ionic group, and the polymer A) after drying is semicrystalline or crystalline with a glass transition at a glass transition temperature Tg of between -65°C and -40°C, and B) an aqueous polyurethane or polyurethane-urea dispersion which differs from A) and contains II. a polymer B) formed from II (i). at least one difunctional aromatic polyester polyol having a molecular weight of 400 to 5000 g/mol, II (ii). at least one difunctional polyol component having a molecular weight of 62 to 399, II (iii). at least one aliphatic diisocyanate and II (iv). at least one aminic chain extender having an ionic group, wherein the polymer B) after drying is amorphous with a glass transition at a glass transition temperature Tg of between -15°C and +10°C; and wherein the mixture contains 34.8% to 90.2% by weight of polymer A) and 9.8% to 65.2% by weight of polymer B), based on the sum total of polymers A) and B), for the adhesive bonding of foam substrates by the spray coagulation process, wherein the glass transition temperature Tg is determined by means of DSC as defined in the description. II. a polymer B) formed from II (i). at least one difunctional aromatic polyester polyol having a molecular weight of 400 to 5000 g/mol, II (ii). at least one difunctional polyol component having a molecular weight of 62 to 399, II (iii). at least one aliphatic diisocyanate and II (iv). at least one aminic chain extender having an ionic group, wherein the polymer B) after drying is amorphous with a glass transition at a glass transition temperature Tg of between -15°C and +10°C; and wherein the mixture contains 34.8% to 90.2% by weight of polymer A) and 9.8% to 65.2% by weight of polymer B), based on the sum total of polymers A) and B), for the adhesive bonding of foam substrates by the spray coagulation process, wherein the glass transition temperature Tg is determined by means of DSC as defined in the description.