Polyalkyleneimine-based polymers containing polyether chains

A polymer having

• a) from 0.5 to 25 wt. % of a polyalkyleneimine backbone based on the total weight of the polymer;
• b) from 0.5 to 25 wt. % of at least one aromatic moiety P.1, based on the total weight of the polymer, which is bound to a nitrogen atom of the polyalkyleneimine backbone via a carboxamide or a carboximide group;
• and
• c) from 50 to 99 wt. % of at least one aliphatic polyether moiety P.2, based on the total weight of the polymer, which is bound to a nitrogen atom of the polyalkyleneimine backbone,
• wherein the at least one aliphatic polyether moiety P.2 is a radical of the formula (P.2a)
• wherein,
• # indicates the point of attachment to a nitrogen atom of the polyalkyleneimine backbone;
• R1 and R2 are each independently selected from the group consisting of hydrogen and C1-C2-alkyl;
• m is an integer from 0 to 100;
• n is an integer from 0 to 100;
• m+n is an integer from 2 to 150;
• and
• T is hydrogen, C1-C20-alkyl, C2-C20-alkenyl, C(═O)—C2-C20-alkenyl or C(═O)—C1-C20-alkyl, wherein C2-C20-alkenyl has 1,2, 3 or 4 olefinic C═C-double bonds, and wherein 1, 2, 3, or 4 non-adjacent CH2 groups of C1-C20-alkyl may be replaced by O, and
• wherein the at least one aromatic moiety P.1 is selected from the moieties of the formulae (P.1′) and (P.1″),
• wherein
• # indicates the point of attachment of the aromatic moiety P.1 to a nitrogen atom of the polyalkyleneimine backbone;
• Ar is selected from the group consisting of phenyl and naphthyl, wherein phenyl and naphthyl, each independently, are unsubstituted or substituted by 1, 2, 3, 4 or 5 radicals, which are selected from the group consisting of halogen, OH, C1-C4-alkyl, C1-C4-alkoxy, C(═O)—OH, C(═O)—NH2, NH2, NO2, NH—C(═O)—H, NH—C1-C4-alkyl and NH—C(═O)—C1-C4-alkyl;
• and
• Ar′ is selected from the group consisting of 1,2-phenylene, 1,2-, 2,3-, or 1,8-naphthylene, wherein phenylene and naphthylene, each independently, are unsubstituted or substituted by 1, 2, 3, 4 or 5 radicals, which are selected from the group consisting of halogen, OH, C1-C4-alkyl, C1-C4-alkoxy, C(═O)—OH, C(═O)—NH2, NO2, NH2, NH—C(═O)—H, NH—C1-C4-alkyl, and NH—C(═O)—C1-C4-alkyl.