Ionic bonding group-containing comb polymers

A copolymer containing

• i) 40-73 mole percent of a base structural unit (A) and
• ii) 27-60 mole percent of a substituted dicarboxylic acid derivative structural unit (B), wherein the base structural unit (A) is generated by reacting a monomer (a) containing an olefinic double bond as well as no species falling under the dicarboxylic acid derivative structural unit (B),
• wherein the substituted dicarboxylic acid derivative structural unit (B) is present according to one or more of the general formulas of the group consisting of (I-1), (I-2), (I-3), (I-4), (I-5), (I-6), (II-1), (II-2), (II-3), (III-1), (III-2), (III-3), (IV-1) and (IV-2)
• with
• Z1, Z2, Z3 and Z4 in each case identical or different and in each case independently of one another represented by hydrogen, a linear C1-C4 alkyl residue and/or polymer main chain linking sites, with the condition that, for each general formula, there are exactly two polymer main chain linking sites,
• X1 and X2 in each case identical or different and in each case independently of one another represented by NH and/or O,
• R1 and R2 in each case identical or different and in each case independently of one another represented by a branched or unbranched, saturated or unsaturated, organic residue containing at least four carbon atoms as well as at least three oxygen atoms, and which comprises no amine functions and no ammonium functions,
• E1 and E2 in each case identical or different and in each case independently of one another represented by an N,N-disubstituted amine residue of general formula (V-E)
• with
• R11, R12 in each case identical or different and in each case independently of one another represented by a substituted or unsubstituted, branched or unbranched, C1-C24 alkyl group, by a substituted or unsubstituted C4-C10 cycloalkyl group, by a substituted or unsubstituted C6-C18 aryl group and/or a substituted or unsubstituted, branched or unbranched C7-C18 arylalkyl group, where R11 and R12 together with the N atom binding R11 and R12 can form an aromatic or aliphatic, substituted or unsubstituted, cyclic C3-C10 group,
• Y identical or different and represented by a substituted or unsubstituted, branched or unbranched, C1-C24 alkylene group and/or a substituted or unsubstituted C6-C18 arylene group
• Q1 and Q2 in each case identical or different and in each case independently of one another represented by a quaternary ammonium residue of general formula (V-Q)
• with
• R11, R12 of the same equivalence as in the general formula (V-E),
• Y of the same equivalence as in the general formula (V-E),
• R13 identical or different and represented by hydrogen, by a substituted or unsubstituted, branched or unbranched, C1-C24 alkyl group, by a substituted or unsubstituted C4-C10 cycloalkyl group, by a substituted or unsubstituted C6-C18 aryl group and/or a substituted or unsubstituted, branched or unbranched, C7-C18 arylalkyl group,
• M− identical or different and represented by an anion,
• wherein the molar fraction of the structural units that are part of the group consisting of (I-1), (I-2), (I-3), (I-4), (I-5) and (I-6) is 10-80%, relative to the totality of the structural units to be attributed to the dicarboxylic acid derivative structural unit (B),
• the molar fraction of the structural units that are part of the group consisting of (I-2), (I-3), (I-4), (I-5), (I-6), (II-2), (II-3), (III-2) and (III-3) is 10-90%, relative to the totality of the structural units to be attributed to the dicarboxylic acid derivative structural unit (B), and,
• regarding the dicarboxylic acid derivative structural unit (B), the molar fraction of the substituents that are part of the group consisting of Q1 and Q2 is 20-95%, relative to the totality of the substituents that are part of the group consisting of E1, E2, Q1 and Q2.