A TGDDM epoxy resin and its synthesis method

Abstract

This invention discloses a TGDDM epoxy resin and its synthesis method, belonging to the field of resin synthesis technology. The technical solution includes: mixing epichlorohydrin and ethylene glycol, then adding 4,4'-diaminodiphenylmethane to conduct a ring-opening reaction to prepare an intermediate; removing unreacted epichlorohydrin from the intermediate, then adding acetone and pure water to obtain a mixed solution; adding NaOH aqueous solution dropwise to the mixed solution to conduct a ring-closure reaction; after the ring-closure reaction, removing residual epichlorohydrin and solvent to obtain a crude epoxy resin product; desalting the crude epoxy resin product, after which the hydrolyzable chlorine content of the epoxy resin is 8000-20000 ppm, and then purifying it to obtain TGDDM epoxy resin. This invention is applied to the synthesis of TGDDM epoxy resin, solving the problems of numerous by-products and low purity in TGDDM epoxy resin prepared by existing processes, and can greatly reduce the formation of by-products and improve the purity of TGDDM epoxy resin.

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