abstract |
It is proposed to use betaine esters of the formula (I), <IMAGE> in which R <1> for linear and / or branched alkyl and / or alkenyl radicals and / or aromatic and / or cycloaliphatic radicals having 2 to 22 carbon atoms, R <2>, R <3> independently of one another for alkyl and / or hydroxyalkyl radicals having 1 to 8 carbon atoms, R <4> for R <1> or an [A-OOC- (CH2) nNR <1> R <2> R <3>] <+> X <-> group in which A represents alkylene radicals having 2 to 22 carbon atoms and / or radicals [-CH2CHR <5> - (OCH2CHR <5>) p-], in which R <5> represents H and / or methyl and p represents numbers from 1 to 10; n stands for numbers from 1 to 6 and X stands for an anion, as microbicidal active substances, preferably in detergents and cleaning agents and cosmetic and pharmaceutical preparations. |