Epoxy Resin, Epoxy Resin Composition And Cured Product Thereof

摘要

The present invention relates to an epoxy resin whose cured product has a high heat resistance, and directed to provide an epoxy resin improved in adhesiveness and toughness in comparison with the conventional highly heat resistant epoxy resin. Specifically disclosed is an epoxy resin obtainable by glycidylation of a mixture of (a) a phenol compound condensate which is a condensate of phenols and glyoxal and contains not less than 80% (area % by a gel permeation chromatography) of a compound represented by the formula (1): (wherein R represents each independently a hydrogen atom, (C₁-C₁₅) hydrocarbon group or trifluoromethyl group); and (b) a phenol compound other than (a) or a phenol resin.