Patent ID: 10351660

Abstract:
A phenolic resin composition and an epoxy resin composition from which a cured epoxy resin having excellent heat resisting properties and a low dielectric constant can be produced. The phenolic resin composition contains a modified phenolic resin and a tetrakisphenolethane compound, the modified phenolic resin being prepared by condensation of a cyclic hydrocarbon compound having two or more unsaturated bonds and a compound having a phenolic hydroxyl group, in which the content of the tetrakisphenolethane compound is 3% to 60% by mass with respect to the total content of the modified phenolic resin and the tetrakisphenolethane compound. The epoxy resin composition is prepared by epoxidizing the phenolic resin composition. The cured epoxy resin is prepared by allowing the epoxy resin composition to react with a hardener.