Abstract: The invention relates to cosmetic preparations which have a content of compounds of the general formula I ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are identical or different and are hydrogen or alkyl with 1 to 4 carbon atoms, where R.sup.1 and R.sup.3 are preferably hydrogen and R.sup.2 is preferably methyl,X is S or O,Y is hydrogen or up to two halogen atoms, preferably chlorine and/or bromine,Z is a single bond or the divalent radicals 0, S, --CH.sub.2 --, --CH.sub.2 --O--, --O--CH.sub.2 --, --CH.sub.2 --S--, --S--CH.sub.2 -- or --CH.dbd.CH--CH.sub.2 --O--,Ar is an aromatic ring system which has up to two rings and which can be substituted by up to three radicals from the group comprising fluorine, chlorine, bromine, methoxy, C.sub.1 -C.sub.4 -alkyl, trifluoromethyl and trifluoromethoxy,and/or their salts.The invention furthermore relates to the use of these cosmetic preparations as antidandruff composition and deodorant cosmetic composition.

Abstract: Process for the preparation of copolymers from acrylamide and acrylic or methacrylic acid, wherein to prepare 100 parts by weight of the copolymer, (A) 10-90 parts by weight of acrylamide, (B) 90-100 parts by weight of acrylic acid and/or methacrylic acid or of a salt thereof, (C) 0-40 parts by weight of another copolymerizable monomer and (D) 0-5 parts by weight of a copolymerizable crosslinking agent which has two or more olefinic double bonds are polymerized in an alcohol having 1-4 carbon atoms by precipitation polymerization such that 10-90% by weight of the alcohol, 10-90% by weight of the total amount of monomers (A), (B) and (C) together with 100% by weight of the crosslinker substance are initially mixed, polymerization is started with 10-100% by weight of the initiator and then the remainder of the solvent, monomers, crosslinking agent and initiator to make up to 100% is metered in, as individual components or as a mixture, after the polymerization has started.