Application of low molecular organic compounds as viscosity regulators for highly viscous technical tenside concentrates

摘要

For highly viscous surfactant concentrates of the type of synthetic anionic surfactants, in particular of α-sulfofatty acid esters with at least 30% by weight of the Na salt of α-sulfofatty acid esters, the substances suitable as viscosity regulators comprise one or more compounds of the following groups: a) in the α position by halogen - C1-6 alkyl monocarboxylic acid substituted with cyano or sulfo groups, their salts or their esters with C1-5 alkanols, in particular with ethanol or methanol; b) C1-6-alkylenedicarboxylic acids substituted in the α-position by halogen, cyano or sulfo groups, their salts or their esters with C1-6-alkanols, in particular with ethanol or methanol; c) nitrilotriacetic acid or its salts; d) ether alcohols with 2-4 alkylene glycol units and an alkoxy group, in particular a methoxy or ethoxy group. The substances are added in amounts of 1 to 15 (7 to 12) percent by weight, based on the amount of surfactant, so that the viscosity of the concentrates is reduced to a maximum of 10,000 mPas at 70 ° C.