abstract |
It is proposed to use cationic surfactants of the formula (I) in which R 1 is a saturated or unsaturated, branched or linear alkyl radical having 6 to 22 carbon atoms, R 2 and R 3 are independently alkyl radicals having 2 to 3 carbon atoms or hydrogen, n is 2 or 3 and X is halogen, deprotonated carboxylic acids or methosulfate. |