Epoxy resin composition

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PROBLEM TO BE SOLVED : To provide an epoxy resin composition which can easily be handled and is excellent in adhesiveness to metals, and in the water-absorbability and transparency of a curd product.SOLUTION : An epoxy resin composition comprises an epoxy resin and a cyclic disulfide compound represented by formula (1), (wherein, m and n are each independently an integer of 1-6; R-Rare each identically or differently OH, SH, COOH, NH, or a 1-6C alkyl having the substituents, or H; X is O, S, or NH).