] wherein R3 is a C1-C10 alkyl or alkenyl group, preferably a C1-C5 alkyl group, more preferably methyl; [0148] and wherein n and m are integers independently ranging in the range of from 1 to 20, preferably from 1 to 10, more preferably from 1 to 5; or mixtures thereof. [0149] These surfactants are commercially available from BASF under the trade name Plurafac???, from HOECHST under the trade nam