Cationic polymers obtainable by free-radically initiated copolymerization of (a) from 60 to 99% by weight, based on the overall amount of all monomers, of a substituted or unsubstituted and quaternized or nonquaternized 1-vinylimidazole, (b) from 1 to 40% by weight of an acid which contains a polymerizable double bond, or of salts of such an acid, and (c) from 0 to 30% by weight of a further free-radically copolymerizable monomer, percentages by weight being based in each case on the overall amount of all monomers, and quaternization of the polymer if a nonquaternized 1-vinylimidazole was employed as monomer a) are used as active ingredients in cosmetic hair formulations such as shampoos.

Los polímeros catiónicos obtenibles por la copolimerización iniciada libre-radical de (a) a partir del 60 hasta el 99% por el peso, basada en la cantidad total de todos los monomers, de un haber substituido o sin sustituir y quaternized o nonquaternized 1-vinylimidazole, (b) a partir de la 1 hasta el 40% en peso de un ácido que contiene un enlace doble polymerizable, o de sales de tal ácido, y (c) a partir de la 0 hasta el 30% en peso de otro monomer copolymerizable libre-radical, los porcentajes por el peso que era basado en cada caso en la cantidad total de todos los monomers, y el quaternization del polímero si a nonquaternized 1-vinylimidazole fue empleado pues el monomer a) se utiliza como ingredientes activos en formulaciones cosméticas del pelo tales como champúes.

 
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