| abstract |
An object of the present invention is to provide a filler for engineering plastics that balances thermal conductivity, water resistance, acid resistance, flame retardancy, and processability. SOLUTION: Magnesite ore, which is a natural mineral, is pulverized to an average particle size of 1 to 30 μm, and higher fatty acid, higher fatty acid metal salt, higher fatty acid ester, higher fatty acid amide, higher alcohol, hardened oil, silane coupling agent, alcohol Cover the surface with phosphate ester or the like. Moreover, the resin composition which mix | blended 100-300 mass parts with respect to 100 mass parts of engineering plastics. [Selection figure] None |