The present invention provides an epoxy resin composition containing an epoxy resin (A) having a viscosity at 25°C of 1000 mPa·s or less, an epoxy resin (B) having at least two epoxy groups that is other than the epoxy resin (A), a core-shell rubber particle (C), and an amine curing agent (D). The content of the epoxy resin (A) is in the range of 0.5 to 15 mass% relative to the total mass of (A), (B), (C), and (D), and the content of the core-shell rubber particle (C) is in the range of 1 to 10 mass% relative to the total mass of (A), (B), (C), and (D). This epoxy resin composition has low viscosity and good impregnation property into fibers and is capable of forming into a cured product having high heat resistance, high mechanical properties, and high water absorption resistance.
本发明提供了一种环氧
树脂组合物,该组合物包含在 25°C 时粘度为 1000 mPa-s 或以下的环氧
树脂(A)、除环氧
树脂(A)外具有至少两个环氧基团的环氧
树脂(B)、芯壳橡胶颗粒(C)和胺固化剂(D)。环氧
树脂(A)的含量占(A)、(B)、(C)和(D)总质量的 0.5 至 15%,芯壳橡胶颗粒(C)的含量占(A)、(B)、(C)和(D)总质量的 1 至 10%。这种环氧
树脂组合物粘度低,对纤维的浸渍性能好,能够形成具有高耐热性、高机械性能和高吸
水性的固化产品。