Process for the preparation of diepoxides

Details Process for the preparation of diepoxides Process for the preparation of diepoxides

C - Chemistry, Metallurgy

07

D

260/374.7

C07D 301/32 (2006.01) C08G 59/00 (2006.01) C08G 59/06 (2006.01)

Patent

CA 1062719

ABSTRACT OF THE DISCLOSURE Diepoxides of the general formula: Image 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° - 200°C and distilling off said diepoxide from the thus treated epoxy resin at 0.1 - 0.005 mm Hg and a tem- perature not exceeding 240°C. The low viscosity, narrow moleoular weight distribution and excellent purity of these diepoxides allow their use in critical application fields.

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