| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject resin composition having an improved balance between deflection temperature under load and tensile strength excellent in mechanical properties, fatigue characteristics, heat resistance, chemical resistance by containing two kinds of crystalline polyimide having different crystallizing rate. SOLUTION: This composition contains 100 pts.wt. of the polyimide resin A having a repeating unit of formula I, logarithmic viscosity (ηinh) of 0.1 to 3.0 dl/g, high in crystallizing rate and having a low glass transition temperature of about 200 deg.C, unable to manifest sufficient heat resistance, and 10 to 100 pts., preferably 50 to 60 pts. of the polyimide resin B having a repeating unit of formula II, logarithmic viscosity of 0.1 to 3.0 dl/g, excellent in heat resistance, molding characteristics, low in crystallizing rate and difficult to crystallize in a metal mold [e.g. AURUM (R) (a product of the Mitui Toatsu Chmicals Inc., having glass transition point at 250 deg.C, melting point at 388 deg.C)].
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