Electrical Insulation Resin Composition, Cured Product Thereof, Methods of Preparing the Composition and the Product, and High Voltage Apparatuses and Power Transmission and Distribution Apparatuses Using the Composition and the Product

摘要

The present invention is aimed at enhancing dispersibility of filler, maintaining uniform low-thermal-expansion properties and mechanical strength, enhancing insulation characteristics, especially treeing resistivity, of a resin composition or a cured resin product, and enhancing the reliability of a high voltage apparatus, a power transmission and distribution apparatus or the like to which the resin composition or the cured resin product is applied.;An insulating resin composition contains an insulating resin 1 as a matrix, a large particle diameter filler 2, and a small particle diameter filler 3 smaller in particle diameter than the large particle diameter filler 2, the large particle diameter filler 2 and the small particle diameter filler 3 being dispersed in the insulating resin 1, wherein the insulating resin 1 and the large particle diameter filler 2 has an affinity for each other, whereas the insulating resin 1 and the small particle diameter filler 3 have no affinity for each other.