| 摘要 |
An object of the invention is to provide an epoxy resin composition having a low viscosity around a room temperature and excellent reinforcing fiber impregnating properties, thereby to provide a composite material having excellent heat resistance and mechanical properties including compressive strength. According to the present invention there is provided an epoxy resin composition comprising an aromatic epoxy resin having at least di-functionality, an aromatic amine compound and/or an alicyclic amine compound, wherein 5 minutes after the main agent comprising the epoxy resin and the curing agent comprising the aromatic amine compound and/or the alicyclic amine compound are mixed, the composition shows a viscosity at 25 DEG C in the range of from 1 to 1500 mPas, and Tc, tc, and Tg satisyfy the following equation. <DF NUM="(1)">Tg ≥ Tc + 20 - k x (Tc - 90) </DF> k = 0 when 60 ≤ Tc < 90 k = 0.35 when 90 ≤ Tc ≤ 200 Tc: highest temperature ( DEG C) during the curing process (60 ≤ Tc ≤ 200) tc: retention time (min) at the highest temperature (1 ≤ tc ≤ 120) Tg: glass transition temperature of the epoxy resin composition after a lapse of tc (min) at Tc ( DEG C). |
