A method for the production of wood-based materials, comprising the steps: (i) providing lignocellulose-containing material containing 5-40% by weight lignins and 15-95% by weight holocellulose; (ii) contacting the material from step (i) with a binder system comprising at least the following components: - at least one isocyanate groups-containing component (a), - at least one component (b) selected from the group consisting of ammonium acetate, (NH 4)H 2 PO 4 (ammonium dihydrogen phosphate), (NH 4) 2 HPO 4 (diammonium hydrogen phosphate), (NH 4) 3 PO 4 (ammonium phosphate), [NH 4 PO 3]n (ammonium polyphosphate) and mixtures thereof, wherein the binder system contains water, and wherein component (b), based on its ammonium equivalents, is present in an at least 2.0 molar, preferably at least 6.0 molar, solution in the amount of water used, and wherein component (b) dissolves completely at 20°C in the amount of water used and is adjusted to a pH greater than 7; and wherein the amount of water is 7-15% by weight based on the total amount of the isocyanate groups-containing component (a); wherein the binder system contains the at least one isocyanate groups-containing component (a) in an amount of at least 50% by weight, based on all polymerisable components of the binder system; wherein a mixture is obtained; and (iii) thermal, thermomechanical or mechanical curing of the mixture of step (ii), wherein a wood-based material is obtained. (i) providing lignocellulose-containing material containing 5-40% by weight lignins and 15-95% by weight holocellulose; (ii) contacting the material from step (i) with a binder system comprising at least the following components: - at least one isocyanate groups-containing component (a), - at least one component (b) selected from the group consisting of ammonium acetate, (NH 4)H 2 PO 4 (ammonium dihydrogen phosphate), (NH 4) 2 HPO 4 (diammonium hydrogen phosphate), (NH 4) 3 PO 4 (ammonium phosphate), [NH 4 PO 3]n (ammonium polyphosphate) and mixtures thereof, wherein the binder system contains water, and wherein component (b), based on its ammonium equivalents, is present in an at least 2.0 molar, preferably at least 6.0 molar, solution in the amount of water used, and wherein component (b) dissolves completely at 20°C in the amount of water used and is adjusted to a pH greater than 7; and wherein the amount of water is 7-15% by weight based on the total amount of the isocyanate groups-containing component (a); wherein the binder system contains the at least one isocyanate groups-containing component (a) in an amount of at least 50% by weight, based on all polymerisable components of the binder system; wherein a mixture is obtained; and - at least one isocyanate groups-containing component (a), - at least one component (b) selected from the group consisting of ammonium acetate, (NH 4)H 2 PO 4 (ammonium dihydrogen phosphate), (NH 4) 2 HPO 4 (diammonium hydrogen phosphate), (NH 4) 3 PO 4 (ammonium phosphate), [NH 4 PO 3]n (ammonium polyphosphate) and mixtures thereof, wherein the binder system contains water, and wherein component (b), based on its ammonium equivalents, is present in an at least 2.0 molar, preferably at least 6.0 molar, solution in the amount of water used, and wherein component (b) dissolves completely at 20°C in the amount of water used and is adjusted to a pH greater than 7; and wherein the amount of water is 7-15% by weight based on the total amount of the isocyanate groups-containing component (a); wherein the binder system contains the at least one isocyanate groups-containing component (a) in an amount of at least 50% by weight, based on all polymerisable components of the binder system; wherein a mixture is obtained; and (iii) thermal, thermomechanical or mechanical curing of the mixture of step (ii), wherein a wood-based material is obtained.