Process for manufacturing solutions of alkylated amino formaldehyde resins having a free formaldehyde content of <0.5% by weight, based on the complete weight of the solution, wherein (a) an amino compound selected from the group consisting of melamine, guanamine, urea, toluenesulphoneamide and glycoluril is methylolated, (b) the methylolated amino compound is alkylated with at least one monoalcohol, (c) the surplus monoalcohol is removed quantitatively, and (d) the remaining residue consisting of or consisting essentially of the alkylated amino formaldehyde resin is dissolved in at least one aprotic solvent.
