RESIN COMPOSITION, CURED BODY AND MULTILAYER BODY

摘要

Provided is: a resin composition capable of reducing the surface roughness of the surface of a cured body obtained by having a roughening treatment performed thereon, and increasing the adhesive strength between the cured body and a metal layer; and a cured body formed by using the resin composition. The resin composition according to the present invention includes an epoxy resin (A), a curing agent (B), and a silica component (C) in which silica particles are surface treated with a silane coupling agent. The silica component (C) includes a silica component (C1) having a particle diameter of 0.2 to 1.0μm. A contained amount of the silica component (C1) is within a range from 30 to 100 vol % in 100 vol % of the silica component (C). A contained amount of the silica component (C) is within a range from 11 to 68 vol % in 100 vol % of the resin composition. A cured body 1 is formed by having a roughening treatment performed on a reactant obtained through a reaction of the resin composition. The surface of the cured body 1 on which the roughening treatment is performed has an arithmetic mean roughness Ra equal to or less than 0.3μm and a ten-point mean roughness Rz equal to or less than 3.0μm.