Ethanolamine glyceryl ether condensation products of the formula (I) are described, in which R1, R2 and R3 may each independently be the same or different and are each hydrogen, a linear or branched, saturated alkyl chain having from 1 to 20 carbon atoms, a linear or branched unsaturated alkenyl group having from 2 to 20 carbon atoms, —CH2—CH2—OH or a radical of the formula (II), with the proviso that at least one of the R1, R2 and R3 radicals is a radical of the formula (II) and at least one further radical of the R1, R2 and R3 radicals is selected from —CH2—CH2—OH and radicals of the formula (II), wherein (O-A), (O-D), R4, R5, a, b, d, and e are as defined in the specification.