Cosmetic agent

A composition as claimed in any of the preceding claims, where the polymer comprises, in copolymerized form, at least one further component chosen from

• e) compounds different from d) having a free-radically polymerizable α,β-ethylenically unsaturated double bond and at least one anionogenic and/or anionic group per molecule,
• f) monomers having a crosslinking action and at least two ethylenically unsaturated nonconjugated double bonds,
• g) free-radically polymerizable monomers different from a) to f),
• and mixtures thereof.

A water-soluble or water-dispersible polymer which comprises, in copolymerized form,

• a) 5 to 50% by weight of at least one α,β-ethylenically unsaturated monomer of the formula I
• 14
• in which
• R1 is hydrogen or C1- to C8-alkyl, and
• X1 is O or NR2, where R2 is hydrogen, C1- to C8-alkyl or C5- to C8-cycloalkyl,
• b) 25 to 90% by weight of at least one N-vinylamide and/or N-vinyllactam,
• c) 0.5 to 30% by weight of at least one compound having a free-radically polymerizable, α,β-ethylenically unsaturated double bond and at least one cationogenic and/or cationic group per molecule,
• d) 0.1 to 30% by weight of at least one α,β-ethylenically unsaturated monomer of the formula II
• 15
• in which
• R3 is hydrogen or C1- to C8-alkyl,
• X2 is O or NR5, in which R5 is hydrogen C1- to C8-alkyl or C5- to C8-cycloalkyl, and
• R4 is hydrogen or a linear C1- to C22-alkyl radical.