Preparation as a cosmetic cleaning or care agent containing at least one compound of the formula R'-O(C b H 2b O) o -{CH 2 -CH[O(C b H 2b O) p R"]-CH 2 O} r -(C b H 2b O) q -R′′′ wherein b is an integer between 2 and 4, o, p, q are each independently integers from 0 to 75, where o+p+q is at least 2, r is 0 or 1, R', R" and R′′′ are each independently H, CH 2 COOM, or RCO, wherein one or two, preferably one, of the radicals R', R" and R′′′ are CH 2 COOM: if R' = CH 2 COOM then o≠0, if R" = CH 2 COOM then p≠0, if R′′′= CH 2 COOM then q≠0, with M = H, alkali metal cation, alkaline earth metal cation, ammonium cation, or organic ammonium cation, and wherein one or two of the radicals R', R", and R′′′ are fatty acid acyl radicals RCO; with R a saturated, mono- or polyunsaturated hydrocarbon chain having 5-23 carbon atoms; which is derived from a C-18 vegetable oil; wherein the proportion of 18 and more carbon atoms of the fatty acid acyl radicals RCO in the compound or in the mixture of compounds is above 60 wt.%, preferably above 72 wt.% and very particularly preferably above 77 wt.%; and the proportion of unsaturated fatty acid acyl radicals is above 55 wt.%, preferably above 65 wt.% and particularly preferably above 72 wt.%, in each case based on the total proportion of fatty acid acyl radicals RCO of the one or more compounds in the cleaning or care agent; and wherein the compound preferably consists of a mixture of different chain lengths and degrees of saturation of the fatty acid radical RCO; and wherein the polyglycol chain of compound is preferably of vegetable origin; and wherein the preparation optionally comprises one or more additional surfactants selected from the groups of alkyl ether sulphates, alkyl sulphates, acyl glutamates, acyl sarcosinates, sulphosuccinate esters, alkyl glucosides, amidoalkyl betaines, alkanolamides and amphoacetates, said surfactants containing saturated alkyl or acyl groups with chain lengths between 8-18 carbon atoms, or mixtures of saturated alkyl or acyl groups with 8 to18 carbon atoms and unsaturated C-18 alkenyl or acyl groups as obtained from coconut oil, palm kernel oil or babassu oil; and wherein the ratio of to the sum of surfactants is ≥ 100: 1; and wherein the preparation additionally comprises one or more surfactants selected from the group of soaps, fatty acid amides and fatty acid imines and ethoxylated fatty acid alkyl esters, wherein the fatty acid radicals are each derived from C-18 vegetable oils and are preferably present as a mixture according to the fatty acid distribution in the native oil or as they occur from the conversion of natural vegetable oils or fats; and wherein the preparation does not contain any glycolipid biosurfactants from fermentative production. wherein b is an integer between 2 and 4, o, p, q are each independently integers from 0 to 75, where o+p+q is at least 2, r is 0 or 1, R', R" and R′′′ are each independently H, CH 2 COOM, or RCO, wherein one or two, preferably one, of the radicals R', R" and R′′′ are CH 2 COOM: if R' = CH 2 COOM then o≠0, if R" = CH 2 COOM then p≠0, if R′′′= CH 2 COOM then q≠0, with M = H, alkali metal cation, alkaline earth metal cation, ammonium cation, or organic ammonium cation, and wherein one or two of the radicals R', R", and R′′′ are fatty acid acyl radicals RCO; with R a saturated, mono- or polyunsaturated hydrocarbon chain having 5-23 carbon atoms; which is derived from a C-18 vegetable oil; wherein the proportion of 18 and more carbon atoms of the fatty acid acyl radicals RCO in the compound or in the mixture of compounds is above 60 wt.%, preferably above 72 wt.% and very particularly preferably above 77 wt.%; and the proportion of unsaturated fatty acid acyl radicals is above 55 wt.%, preferably above 65 wt.% and particularly preferably above 72 wt.%, in each case based on the total proportion of fatty acid acyl radicals RCO of the one or more compounds in the cleaning or care agent; and wherein the compound preferably consists of a mixture of different chain lengths and degrees of saturation of the fatty acid radical RCO; and wherein the polyglycol chain of compound is preferably of vegetable origin; and wherein the preparation optionally comprises one or more additional surfactants selected from the groups of alkyl ether sulphates, alkyl sulphates, acyl glutamates, acyl sarcosinates, sulphosuccinate esters, alkyl glucosides, amidoalkyl betaines, alkanolamides and amphoacetates, said surfactants containing saturated alkyl or acyl groups with chain lengths between 8-18 carbon atoms, or mixtures of saturated alkyl or acyl groups with 8 to18 carbon atoms and unsaturated C-18 alkenyl or acyl groups as obtained from coconut oil, palm kernel oil or babassu oil; and wherein the ratio of to the sum of surfactants is ≥ 100: 1; and wherein the preparation additionally comprises one or more surfactants selected from the group of soaps, fatty acid amides and fatty acid imines and ethoxylated fatty acid alkyl esters, wherein the fatty acid radicals are each derived from C-18 vegetable oils and are preferably present as a mixture according to the fatty acid distribution in the native oil or as they occur from the conversion of natural vegetable oils or fats; and wherein the preparation does not contain any glycolipid biosurfactants from fermentative production.