▎ 摘　　要

NOVELTY - Composite material comprises reinforcement fibers impregnated with a thermoset resin composition comprising (A) an epoxy resin component comprising combination of multifunctional epoxy resins chosen from difunctional, trifunctional and tetrafunctional polyepoxides, (B) a curative component comprising 4,4'-methylenebis(2,6-xylidine), and (C) a thermoplastic component, where the thermoset resin composition is void of any catalyst or accelerator that is reactive with the epoxy resin(s). USE - The composite material is used for fabricating load-bearing structures and fabricating high-performance structures, such as primary and secondary structures of aircrafts and automotive portions by laying up multiple layers of thermosettable prepregs on a mold surface followed by consolidation and curing, and used for aerospace applications usually evaluated for use in hot and wet conditions. ADVANTAGE - The composite material has excellent hot/wet performance, which refers the mechanical properties of the material when tested after prolonged exposure to relatively high temperatures and high humidity conditions, and has improved toughness, damage tolerance, hot/wet performance, processing, micro-cracking resistance, and reduced solvent sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for fabricating a composite portion, involving forming prepreg plies from composite material, placing prepreg plies on a tool surface, and curing prepreg plies at a temperature of 160-180° C for 15-120 minutes to obtain a cured composite portion with a degree of cure of more than 85%.