EPOXY RESIN COMPOSITION, PREPREG, FIBER-REINFORCED COMPOSITE MATERIAL, AND METHOD FOR PRODUCING SAME

• Main Authors: SANO, Kentaro, KURODA, Taiki, MORI, Ayumi, KAMAE, Toshiya
• Format: Patent
• Language: English; French; German
• Published: 15.09.2021
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Provided is a fiber-reinforced composite material exhibiting high heat resistance and excellent appearance quality. It is an epoxy resin composition which contains constituents [A], [B], and [C] and satisfies conditions (i) and (ii):[A] a tri- or higher functional epoxy resin[B] an aromatic amine[C] an imidazole compound(i) 0.20 ≤ b/a ≤ 0.60(ii) 0.002 ≤ c/a ≤ 0.014(where, a (mol) denotes the number of epoxy groups in 100 g of entire of the epoxy resin composition, b (mol) denotes the number of active hydrogen contained in the constituent [B], and c (mol) denotes the number of imidazole rings contained in the constituent [C]).