| abstract |
(57) [Summary] [Purpose] An epoxy resin with enhanced toughness. [Structure] a) At least one epoxy resin containing more than one 1,2-epoxy group per molecule on average, b). An epoxy resin composition comprising an anhydride curing agent for epoxy resin a, c) a toughening agent, and d) a compound containing two active hydrogen atoms capable of reacting with epoxy resin a; Obtained cured product [Effect] It becomes a resin more suitable for casting resin, laminating resin, molding compound, coating compound or encapsulation system of electric / electronic parts. |