A curing accelerator for epoxy resin, an epoxy resin composition and electronic device

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PROBLEM TO BE SOLVED : To provide a curing accelerator for epoxy resin which can prevent the flowability of an epoxy resin composition from decreasing with time, an epoxy resin composition and an electronic part device.SOLUTION : A curing accelerator for epoxy resin comprises at least one selected from the group consisting of a compound represented by general formula (I-1) and intermolecular salt thereof. (In the formula (I-1), m is an integer of 1-3, n is an integer of 1-5, Ris a 1-18C hydrocarbon group, and Rand Rare a hydrogen atom or a 1-18C organic group.)