A polyether dendrimer of formula (I), wherein the symbols and indices have the following meanings: each Y is independently [R1-(O-CH2 -CH2)p-O-]； each Z is independently [R2-(O-CH2-CH2)q(O-CH(CH3)-CH2)r-O-]； each R1 is independently H, CH3 or C2 -C4 -alkyl； each R2 is independently linear or branched C8 -C22 -alkyl； X is H or C1-C4-alkyl； m is 1, 2, 3, 4, 5 or 6； n, o are rational positive numbers >； 0, with the proviso that the sum of n and o is 2m； pis a natural number from 5 to 50； q is a natural number from 1 to 50； r is 0 or is a natural number from 1 to 30, with the proviso that 5 ≤q + r ≤50, and ~ denotes the bonding of the respective group to the dendron scaffold, is useful for solubilizing sparingly-water soluble active ingredients, in particular pesticides.
