For certain application fields the viscosity of epoxy resins is too hi
gh. It is possible, however, the lower it by addition of various dilue
nts. The influene of 1,1-diphenylethane on the viscosity and reactivit
y of casting resin mixtures and on the properties of cured products wa
s studied and compared with other diluents. Epoxy systems modified wit
h DPE revealed lower viscosity, good chemical resistance and almost un
changed mechanical, thermal and electrical properties.