Method for producing an additive composition comprising steps i) to iii), wherein in step i) a hydroxy component with the general formula Y(-OH) q where Y is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue comprising 1 to 1000 carbon atoms, q is the same or different and represented by a whole number from 1 to 10 is converted with a diisocyanate comprising variably reactive NCO groups having the general formula R 1 2 where R 1 is the same or different and represented by a saturated or unsaturated, branched or unbranched organic residue containing 6 to 20 carbon atoms, wherein the diisocyanate with the general formula is used in relation to the hydroxy component with the general formula in a molar ratio of at least (1.1 * arithmetic mean of q): 1.0, so that an isocyanate adduct with the general formula Y(-O-CO-NH-R 1 -NCO) q where Y, q and R 1 are each described as above, results and also a reaction mixture containing unconverted diisocyanate with the general formula, in step ii) at least 50 mol % of the unconverted partial fraction of the diisocyanate with the general formula is removed from the reaction mixture, in step iii) a compound is formed comprising at least one head group residue Z 1 with the general formula Y(-O-CO-NH-R 1 -N H-CO-X-Z 1) q where Y, q and R 1 are each as described above, X is the same or different and represented by O, NH and/or NZ 2 where Z 2 is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue, Z1 is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue containing at least two carbon atoms, which organic residue has at least one head group which is present in salinized or salinizable form and which is selected from the group comprising tertiary amino functions, quaternary ammonium functions, phosphoric acid ester functions and also carbonic acid functions, wherein step iii) is carried out in the form of a single stage iii-a) or a sequence of stages iii-b), in stage iii-a) the isocyanate adduct with the general formula present in the reaction mixture is converted with a compound comprising the head group residue Z 1 which is reactive to isocyanates having the general formula HX-Z 1 where X and Z 1 are each as described above, and in the sequence of stages iii-b), the isocyanate adduct with the general formula present in the reaction mixture is initially converted with a compound which comprises a group HX reactive to isocyanates and also at least a further functional group Q, wherein Q is then converted with a further reagent involved in the production of the head group residue Z 1 forming the head group residue Z 1. Y is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue comprising 1 to 1000 carbon atoms, q is the same or different and represented by a whole number from 1 to 10 R 1 is the same or different and represented by a saturated or unsaturated, branched or unbranched organic residue containing 6 to 20 carbon atoms, wherein the diisocyanate with the general formula is used in relation to the hydroxy component with the general formula in a molar ratio of at least (1.1 * arithmetic mean of q): 1.0, so that an isocyanate adduct with the general formula Y(-O-CO-NH-R 1 -NCO) q where Y, q and R 1 are each described as above, results and also a reaction mixture containing unconverted diisocyanate with the general formula, in step ii) at least 50 mol % of the unconverted partial fraction of the diisocyanate with the general formula is removed from the reaction mixture, in step iii) a compound is formed comprising at least one head group residue Z 1 with the general formula Y(-O-CO-NH-R 1 -N H-CO-X-Z 1) q where Y, q and R 1 are each as described above, X is the same or different and represented by O, NH and/or NZ 2 where Z 2 is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue, Y, q and R 1 are each described as above, Y, q and R 1 are each as described above, X is the same or different and represented by O, NH and/or NZ 2 where Z 2 is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue, Z1 is the same or different and represented by a branched or unbranched, saturated or unsaturated organic residue containing at least two carbon atoms, which organic residue has at least one head group which is present in salinized or salinizable form and which is selected from the group comprising tertiary amino functions, quaternary ammonium functions, phosphoric acid ester functions and also carbonic acid functions, X and Z 1 are each as described above,