abstract |
(57) Abstract: A naphthol-containing novolac type resin having a low melt viscosity, a naphthol novolac type epoxy resin, and a cured product having high heat resistance obtained by curing them. SOLUTION: A naphthol-containing novolak-type resin having a narrow molecular weight distribution obtained by using an oxycarboxylic acid as a catalyst in the synthesis of a naphthol-containing novolak resin, an epoxy resin obtained by glycidylating the same. An epoxy resin composition containing the naphthol-containing novolak type resin and / or an epoxy resin, and a cured product thereof. |