Peroxy derivatives of epoxy resins based on bisphenol A: Effects of quaternary ammonium salts

Oligomers containing peroxy groups have been synthesized on the basis of ep oxides and organic hydroperoxides. Dependence of reaction rates upon the ra tio of starting materials, nature, quantity, concentration of ammonium salt catalysts, temperature and also nature of hydroperoxides have been investi gated. Activation energies and effective rate constants of reactions betwee n hydroperoxides and epoxy resins were calculated. The reaction proceeds by interfacial catalysis, and therefore with poor yields in solvents which ar e miscible with water (acetone and 1.4-dioxane) and with good yields in imm iscible solvents (chloroform and toluene). Structures of the synthesized pe roxy oligomers have been confirmed by IR-spectroscopy.