Aqueous Preparations Comprising at Least One Water-Soluble or Water-Dispersible Copolymer with Cationgenic Groups

An aqueous preparation comprising:

• A) at least one water-soluble or water-dispersible copolymer A) with cationogenic groups, which comprises
• a) at least one monomer with at least one protonatable nitrogen atom selected from the group consisting of
• at least one N-vinylimidazole compound of the general formula (I)
• in copolymerized form, in which R7to R9, independently of one another, are hydrogen, C1-C4-alkyl or phenyl,
• diallylamines of the general formula (III)
• wherein R27 is hydrogen or C1 to C24 alkyl,
• 1,3-divinylimidazolid-2-one, and
• N-disubstituted vinylamines of the general formula (IV):
• (R28)2N—(CH2)n—CR15═CHR14 (IV)
• wherein
• R14 and R15, independently of one another, are selected from the group consisting of hydrogen, C1-C8 linear or branched-chain alkyl, methoxy, ethoxy, 2-hydroxyethoxy, 2-methoxyethoxy and 2-ethoxyethyl,
• n is 0, 1 or 2, and
• R28 is selected from the group consisting of hydrogen C1-C40 linear or branched-chain alkyl radicals, formyl, C1-C10 linear or branched-chain acyl, N,N-dimethylaminoethyl, 2-hydroxyethyl, 2-methoxyethyl, 2-ethoxyethyl, hydroxypropyl, methoxypropyl, ethoxypropyl or benzyl, preferably methyl, ethyl, n-propyl and benzyl, wherein both radicals R28 are not hydrogen at the same time if n=0;
• and
• b) at least one further monomer copolymerizable therewith in copolymerized form;
• and
• B) at least one cosmetically acceptable carrier, wherein the pH of the aqueous preparation has a value in the range from pH 4 to pH 6.