A triazine-precondensate-aldehyde condensation product obtainable by reacting a) at least one triazine compound of the general formulae b) at least one aldehyde, in particular formaldehyde, and c) at least one triazine precondensate of the general formula wherein - R 1 means Q 1 or a moiety of the formula R 3 -N-R 4 connected with the nitrogen atom to the respective triazine ring of the structure of formula or, - R 9 means Q 1 or a moiety of the formula R 7 -N-R 8 connected with the nitrogen atom to the triazine ring of the structure of formula, - R 2, R 3, R 4 and R 6 mean independently from each other H, Q 1 or - R 7 and R 8 mean independently from each other H, Q 1, or - R 10 and R 11 mean independently from each other R 7 or R 8; - R 5 means linear or branched C 2 -C 20 -alkyl that can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms - R x, R y mean independently from each other H, OH, Q 1, -[C 1 -C 18]-OH or wherein - Q 1 means linear or branched C 1 -C 20 -alkyl, linear or branched C 2 -C 20 -alkenyl, linear or branched C 2 -C 20 -alkinyl, C 3 -C 10 -cycloalkyl, C 5 -C 7 -cycloalkenyl, which in each case can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms and/or by one or more groups of the type -C O-, -OC -, -C -, -NHC O-, -OC NH- and/or -OC O-; and wherein - n = 0-10, preferably 1-8, most preferably 1 - 5; - m = 0-8, preferably 1-7, most preferably 1 - 5; or mixtures thereof, and wherein the molar ratio of the at least one aldehyde to the at least one triazine of general formulae, and the at least one precondensate of the general formulae is in each case in a range between 0.4: 1 and 3: 1. a) at least one triazine compound of the general formulae b) at least one aldehyde, in particular formaldehyde, and c) at least one triazine precondensate of the general formula wherein - R 1 means Q 1 or a moiety of the formula R 3 -N-R 4 connected with the nitrogen atom to the respective triazine ring of the structure of formula or, - R 9 means Q 1 or a moiety of the formula R 7 -N-R 8 connected with the nitrogen atom to the triazine ring of the structure of formula, - R 2, R 3, R 4 and R 6 mean independently from each other H, Q 1 or - R 7 and R 8 mean independently from each other H, Q 1, or - R 10 and R 11 mean independently from each other R 7 or R 8; - R 5 means linear or branched C 2 -C 20 -alkyl that can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms - R x, R y mean independently from each other H, OH, Q 1, -[C 1 -C 18]-OH or wherein - Q 1 means linear or branched C 1 -C 20 -alkyl, linear or branched C 2 -C 20 -alkenyl, linear or branched C 2 -C 20 -alkinyl, C 3 -C 10 -cycloalkyl, C 5 -C 7 -cycloalkenyl, which in each case can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms and/or by one or more groups of the type -C O-, -OC -, -C -, -NHC O-, -OC NH- and/or -OC O-; and wherein - n = 0-10, preferably 1-8, most preferably 1 - 5; - m = 0-8, preferably 1-7, most preferably 1 - 5; or mixtures thereof, and - R 1 means Q 1 or a moiety of the formula R 3 -N-R 4 connected with the nitrogen atom to the respective triazine ring of the structure of formula or, - R 9 means Q 1 or a moiety of the formula R 7 -N-R 8 connected with the nitrogen atom to the triazine ring of the structure of formula, - R 2, R 3, R 4 and R 6 mean independently from each other H, Q 1 or - R 7 and R 8 mean independently from each other H, Q 1, - R 10 and R 11 mean independently from each other R 7 or R 8; - R 5 means linear or branched C 2 -C 20 -alkyl that can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms - R x, R y mean independently from each other H, OH, Q 1, -[C 1 -C 18]-OH or wherein - Q 1 means linear or branched C 1 -C 20 -alkyl, linear or branched C 2 -C 20 -alkenyl, linear or branched C 2 -C 20 -alkinyl, C 3 -C 10 -cycloalkyl, C 5 -C 7 -cycloalkenyl, which in each case can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms and/or by one or more groups of the type -C O-, -OC -, -C -, -NHC O-, -OC NH- and/or -OC O-; and wherein - Q 1 means linear or branched C 1 -C 20 -alkyl, linear or branched C 2 -C 20 -alkenyl, linear or branched C 2 -C 20 -alkinyl, C 3 -C 10 -cycloalkyl, C 5 -C 7 -cycloalkenyl, which in each case can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms and/or by one or more groups of the type -C O-, -OC -, -C -, -NHC O-, -OC NH- and/or -OC O-; and wherein - n = 0-10, preferably 1-8, most preferably 1 - 5; - m = 0-8, preferably 1-7, most preferably 1 - 5;