DIELECTRIC MEASUREMENTS OF SOLUTIONS OF N ONIONIC POLYETHOXYLATED FATTY-ACIDS AND FATTY ALCOHOLS IN POLAR AND NONPOLAR-SOLVENTS

For the formulation of emulsions the HLB-values are rather empiric. Th erefore, as a more reliable chemical-physical method to characterize t he used surfactants, the permittivities of solutions of nonionic surfa ctants in polar and nonpolar solvents as well as in a model emulsion h ad been examined and were applied to predict stability and type of any emulsion. This application of the permittivities required to find a n ew dielectric function for these mixture systems or to adapt an establ ished model of calculation to such systems.