BARIUM SULFATE COMPOSITE PARTICLES, RESIN COMPOSITION CONTAINING SAME, AND PROCESS FOR PRODUCING SAME

摘要

[Problem] With respect to barium sulfate which is for use in electronic appliances as a filler for resin compositions, precipitated barium sulfate synthesized from barium sulfide as a starting material has a problem that since the barium sulfate contains sulfur as an impurity, use thereof in a resin composition for an ink, film, sheet, or the like that is for use in an electronic appliance results in a possibility that the hydrogen sulfide which has volatilized from the barium sulfate might deteriorate or corrode metallic portions, e.g., electrodes, of electronic components, thereby impairing the function, durability, and reliability of the electronic appliance. [Solution] Barium sulfate composite particles which comprise barium sulfate particles and a zinc compound adhered to the surface thereof and which have an average particle diameter of 0.01-10 µm.