A microcapsule-type curing agent comprises (A) a curing agent for a thermosetting resin and (B) a thermoplastic resin dissolvable in the thermosetting resin by heating. The microcapsule-type curing agent is formed as a particle-like material in which the component (A) is coated with a layer whose main constituent is the component (B) and the mean particle diameter of which is in the range of 0.1 to 20 µ m. By using the microcapsule-type curing agent, a thermosetting resin composition and a prepreg which are good in storage stability at a room temperature and excellent in thermal resistance of a cured product made therefrom can be obtained. Further, a fiber reinforced composite material obtained using this thermosetting resin composition is excellent in curing uniformity and thermal resistance.
一种微胶囊型固化剂包括(A)一种热固性
树脂固化剂和(B)一种可通过加热溶解在热固性
树脂中的热塑性
树脂。通过使用微胶囊型固化剂,可以获得在室温下具有良好储存稳定性且由其制成的固化产品具有优异耐热性的热固性
树脂组合物和预浸料。此外,使用这种热固性
树脂组合物制成的纤维增强复合材料在固化均匀性和耐热性方面也非常出色。