Abstract: The present invention relates to polymers obtainable by free-radical polymerization of a) 30 to 99% by weight of tert-butyl acrylate and/or tert-butyl methacrylate as monomer A, b) 1 to 70% by weight of acrylic acid and/or methacrylic acid as monomer B and c) 0 to 12% by weight of a free-radically copolymerizable monomer or a free-radically copolymerizable monomer mixture as monomer C, where at least one of the monomers C produces a homopolymer with a glass transition temperature of less than 30° C., with the proviso that the % by weight add up to 100, where the K value of the polymers is between 27 and 38 and where the polymerization is carried out in the presence of a regulator if the K value of the polymers is less than or equal to 35, and to the use of these polymers in preparations for, in particular, cosmetics and oral care and dental care.

Abstract: Use of polymers of 30-65% by weight of N-vinylcaprolactam, 35-65% by weight of a monomer mixture of N-vinylimidazole and vinylpyrrolidone, where the weight ratio of N-vinylimidazole to vinylpyrrolidone is between 0.085 and 0.30, 0-15% by weight of a nitrogen-containing quaternizable monomer (A), which is different from N-vinylimidazole, where the sum of monomer (A) and N-vinylimidazole is less than 18% by weight, in cosmetic preparations.

Abstract: The present invention relates to cosmetic and pharmaceutical compositions which comprise at least one polyelectrolyte complex which comprises a copolymer with cationogenic groups based on vinylimidazole and an acid-group-containing polymer. The invention further relates to the use of these polyelectrolyte complexes.

Abstract: The present invention relates to cosmetic preparations, in particular for hair cosmetic applications, which comprise copolymers based on N-vinyllactams and N-vinyl heterocyclic compounds.

Abstract: The invention relates to a cosmetic product containing at least one water-soluble copolymer which is obtained by radical copolymerization of acrylamide and/or methacrylamide and other water-soluble a,?-ethylenically unsaturated compounds which are copolymerizable therewith, optionally in the presence of a water-soluble polymeric graft base.