CURING AGENT FOR EPOXY RESIN

PROBLEM TO BE SOLVED: To provide an amine compound which, when used as an epoxy resin curing agent, achieves low viscosity of an epoxy resin composition and gives good epoxy resin cured product performance.SOLUTION: A curing agent for an epoxy resin comprises a diamine compound having a substituent represented by formula (3) [n is an integer of 0-3; when n is 0, Ris H; when n is 1-3, Ris H, a methyl group, or an ethyl group; Rand Rare each independently H, a 1-3C alkyl group, a methoxy group, an ethoxy group, or a hydroxyl group; and Rand Rmay be bonded together to form a saturated or unsaturated condensed ring].SELECTED DRAWING: None 【課題】エポキシ樹脂硬化剤として使用した際に、エポキシ樹脂組成物が低粘度であり、且つ良好なエポキシ樹脂硬化物性能を与えるアミン化合物の提供。【解決手段】式（３）で示される置換基を有するジアミン化合物からなるエポキシ樹脂用硬化剤。［ｎは０〜３の整数；ｎが０の場合、Ｒ９はＨ；ｎが１〜３の場合、Ｒ９はＨ、メチル基又はエチル基；Ｒ１０〜Ｒ１１は各々独立にＨ、Ｃ１〜３のアルキル基、メトキシ基、エトキシ基、又はヒドロキシル基；Ｒ１０〜Ｒ１１は互いに結合して、飽和若しくは不飽和の縮合環を形成してもよい。］【選択図】なし