EPOXY RESIN COMPOSITION, PREPREG, CURED BODY, SHEET-LIKE MOLDED BODY, LAMINATE AND MULTILAYER LAMINATE

摘要

An epoxy resin composition which can reduce the surface roughness of a roughened surface of a cured body obtained therefrom. The epoxy resin composition contains an epoxy resin, a curing agent, and a silica component which is composed of silica particles surface-treated with a silane coupling agent.  The epoxy resin composition does not contain a curing accelerator, or contains not more than 3.5 parts by weight of a curing accelerator per 100 parts by weight of the total of the epoxy resin and the curing agent.  The silica particles have an average particle diameter of not more than 1 µm, and the surface treatment amount B (g) of the silane coupling agent per 1 g of the silica particles in the silica component is within the range of 10-80% of the value C (g) per 1 g of silica particles, said value being calculated by formula (X).    C (g) / 1 g of silica particles = [specific surface area of silica particles (m2/g) / minimum area covered by silane coupling agent (m2/g)] ··· (X)