An epoxide-amine adduct obtainable by reaction of one or more primary amines of general formula Q-NH 2 with one or more monoepoxides of general formula wherein Q is a radical R t -[OEt] n [OPr] m [OBu] s -, in which R t is a radical selected from alkyl radicals having 1 to 6 carbon atoms, OEt is an ethylene oxide radical, OPr is a propylene oxide radical and OBu is a butylene oxide radical, n is a number from 0 to 100, m is a number from 3 to 50 and s is a number from 0 to 20 and n+m+s = 3 to 170, R is an organic radical selected from aliphatic radicals having 4 to 24 carbon atoms, aromatic radicals having 6 to 18 carbon atoms and araliphatic radicals having 7 to 34 carbon atoms, and p is 0 or 1, characterized in that (i) the primary amine(s) and the monoepoxide(s) are reacted in an equivalents ratio: of from 1:2 to 1:1.35; and (ii) at least 40 mol% of the radicals R are selected from aromatic radicals having 6 to 18 carbon atoms and araliphatic radicals having 7 to 24 carbon atoms; and optionally subsequent (a) salification and/or quaternization of the nitrogen atom introduced into the reaction product of and via formula; and/or (b) reaction of the hydroxyl group, formed by ring opening of the epoxide ring of formula, and/or of the NH group, formed by equimolar reaction of a species of formula with a species of formula, with one or more species selected from the group consisting of lactones, hydroxycarboxylic acids, lactides, monoepoxide compounds and monoisocyanates. Q is a radical R t -[OEt] n [OPr] m [OBu] s -, in which R t is a radical selected from alkyl radicals having 1 to 6 carbon atoms, OEt is an ethylene oxide radical, OPr is a propylene oxide radical and OBu is a butylene oxide radical, n is a number from 0 to 100, m is a number from 3 to 50 and s is a number from 0 to 20 and n+m+s = 3 to 170, R is an organic radical selected from aliphatic radicals having 4 to 24 carbon atoms, aromatic radicals having 6 to 18 carbon atoms and araliphatic radicals having 7 to 34 carbon atoms, and p is 0 or 1, (i) the primary amine(s) and the monoepoxide(s) are reacted in an equivalents ratio: of from 1:2 to 1:1.35; and (ii) at least 40 mol% of the radicals R are selected from aromatic radicals having 6 to 18 carbon atoms and araliphatic radicals having 7 to 24 carbon atoms; and optionally subsequent (a) salification and/or quaternization of the nitrogen atom introduced into the reaction product of and via formula; and/or (b) reaction of the hydroxyl group, formed by ring opening of the epoxide ring of formula, and/or of the NH group, formed by equimolar reaction of a species of formula with a species of formula, with one or more species selected from the group consisting of lactones, hydroxycarboxylic acids, lactides, monoepoxide compounds and monoisocyanates. (a) salification and/or quaternization of the nitrogen atom introduced into the reaction product of and via formula; and/or (b) reaction of the hydroxyl group, formed by ring opening of the epoxide ring of formula, and/or of the NH group, formed by equimolar reaction of a species of formula with a species of formula, with one or more species selected from the group consisting of lactones, hydroxycarboxylic acids, lactides, monoepoxide compounds and monoisocyanates.