Kosmetic agent

The invention relates to cosmetic compositions which are characterised by a content of compounds of the general formula I in which R , R and R are identical or different and are hydrogen or alkyl with 1 to 4 carbon atoms, with R and R preferably being hydrogen and R preferably being methyl, X is S or O, Y is hydrogen or up to 2 halogen atoms, preferably chlorine and/or bromine, Z is a single bond or the divalent radicals O, S, -CH2-, -CH2-O-, -O-CH2-, -CH2-S-, -S-CH2- or -CH = CH-CH2-O-, Ar is an aromatic ring system which has up to two rings and can be substituted by up to three radicals from the group consisting of fluorine, chlorine, bromine, methoxy, C1-C4-alkyl, trifluoromethyl and trifluoromethoxy, and/or their salts. The invention furthermore relates to the use of these cosmetic compositions as antidandruff and deodorant cosmetic products.