| 摘要 |
PROBLEM TO BE SOLVED: To provide epoxy resin compositions capable of sharply reducing a carbon black agglomerate which secondarily forms. SOLUTION: Epoxy resin compositions contain, as the essential components, an epoxy resin, a phenolic resin, an inorganic filler, a curing accelerator, and a carbon black containing particles having a particle diameter of not smaller than 45μm in an amount of not greater than 500 ppm and having a maximum particle diameter of not greater than 500μm, with an amount of the carbon black being 0.1-1.0 wt.% based on the entire epoxy resin composition.
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