| 摘要 |
PROBLEM TO BE SOLVED: To provide a phenolic resin, an epoxy resin, an epoxy resin composition, and a cured product of the epoxy resin showing high fire retardancy.SOLUTION: This invention relates to a phenolic resin represented by formula (2) obtained by condensation of phenol, naphthol, and a compound represented by formula (1), in which the naphthol is α-naphthol, and a naphthol introduction ratio between the phenol and the naphthol is 5-40 mol%. |
