| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a void-free, crack-resistant, high toughness, and short-cure-time fiber-reinforced composite material, to provide a resin composition suited for use in this method, and to provide a fiber-reinforced composite material using the resin composition. SOLUTION: The resin composition comprises 100 pts. wt. (A) cyanate ester resin comprising 50 to 100 pts. wt. (A1) resin modified with 5 to 30 wt.% rubber and 0 to 50 pts. wt. (A2) resin not modified with a rubber and 0.01 to 0.5 pt. wt. (B) metal coordination type catalyst, has a viscosity in the range of 100 to 800 mPa s at 50 to 120°C, and keeps the above viscosity range for 1 hr or longer in the above temperature range. The fiber-reinforced composite material is obtained by subjecting the resin composition to the following steps (1) to (3) in the given order: (1) the step of arranging reinforcing fibers in a die, (2) the step of heating the resin composition at 50 to 120°C to impregnate the reinforcing fibers with the resin composition, and (3) the step of heating the entire to 120 to 200°C after the impregnation. COPYRIGHT: (C)2006,JPO&NCIPI
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