EPOXY RESIN COMPOSITION, EPOXY RESIN COMPOSITION FOR FIBER-REINFORCED COMPOSITE, AND FIBER-REINFORCED COMPOSITE CONTAINING THE SAME
申请人:TORAY INDUSTRIES, INC.
公开号:EP1094087A1
公开(公告)日:2001-04-25
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°C in the range of from 1 to 1500 mPas, and Tc, tc, and Tg satisyfy the following equation.Tg ≥ Tc + 20 - k x (Tc - 90)
k = 0 when 60 ≤ Tc < 90
k = 0.35 when 90 ≤ Tc ≤ 200
Tc: highest temperature (°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 (°C).
本发明的目的是提供一种环氧树脂组合物,该组合物在室温下具有低粘度和优异的增强纤维浸渍性能,从而提供一种具有优异耐热性和机械性能(包括抗压强度)的复合材料。
根据本发明,提供了一种环氧树脂组合物,该组合物包含至少具有二官能度的芳香族环氧树脂、芳香族胺化合物和/或脂环族胺化合物,其中包含环氧树脂的主剂和包含芳香族胺化合物和/或脂环族胺化合物的固化剂混合 5 分钟后,该组合物在 25°C 时的粘度范围为 1 至 1500 mPas,且 Tc、tc 和 Tg 满足下式。Tg ≥ Tc + 20 - k x (Tc - 90)
当 60 ≤ Tc < 90 时,k = 0
当 90 ≤ Tc ≤ 200 时,k = 0.35
Tc:固化过程中的最高温度(℃)(60 ≤ Tc ≤ 200)
tc:最高温度下的停留时间(分钟)(1 ≤ tc ≤ 120)
Tg:环氧树脂组合物在 Tc(℃)时经过 tc(分钟)后的玻璃化转变温度。