To provide a flame-retardant and highly heat-resistant epoxy resin composition developing excellent flame-retardance without using a halogen-based flame-retardant and having high heat-resistance, moisture absorption, etc., and provide the use of the composition.
The flame-retardant and highly heat-resistant epoxy resin composition contains an epoxy resin, a curing agent and optionally a cure accelerator. A phosphorus-containing epoxy resin obtained by reacting an aromatic ring- containing phosphorus compound with an aromatic ring-containing epoxy resin having ≥2 functionality is used as the epoxy resin and a novolak aralkyl resin is used as the curing agent. The invention further provides a prepreg produced by using the composition and usable for electronic circuits and electronic parts, a laminated board produced by using the prepreg and an insulating intermediate layer for a build-up substrate produced by using the composition.
IWAKI YOSHIO
SUZUKI TERUFUMI
NARISAWA HIROAKI
SUZUKI GORO
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