| 摘要 |
PROBLEM TO BE SOLVED: To provide an epoxy resin composition having excellent mechanical strength, a dielectric breakdown voltage kept high not only in the initial stage but also in an energized state, and excellent ability for impregnating the coil, and to provide a molded coil device using the epoxy resin composition. SOLUTION: The epoxy resin composition for impregnating the molded coil contains (A) an epoxy resin, (B) silica particles, (C) an acid anhydride and (D) a curing accelerator as essential components, wherein the content of the silica particles having 10-30μm average particle diameter as the silica particles (B) is 30-85 mass% based on the epoxy resin composition. The molded coil device is obtained by using the composition. COPYRIGHT: (C)2008,JPO&INPIT |
