abstract |
As a resin composition containing nanoparticles (A) of alumina and / or boehmite having an average particle diameter of 1.0 nm to 100 nm, fine particles (B) having an average particle diameter of 0.20 mu m to 100 mu m, and a thermosetting resin (C) Wherein the nanoparticles (A) have a surface treated with a modifier of a polysiloxane base. |