PROCESS FOR THE PREPARATION OF DIEPOXIDES

摘要

Diepoxides of the general formula: wherein n has an average value not exceeding 0.03 and R is the bisphenyl radical of bisphenol-A are recovered from an epoxy resin of the same general formula with n varying from 0.07 to 0.30, by removing the low-boiling substance from the epoxy resin at 0.1 - 1 mm Hg and 165.degree. - 200.degree.C and distilling off said diepoxide from the thus treated epoxy resin at 0.1 - 0.005 mm Hg and a temperature not exceeding 240.degree.C. The low viscosity, narrow moleoular weight distribution and excellent purity of these diepoxides allow their use in critical application fields.