Epoxy containing epoxy resin, epoxy resin composition, prepreg, laminated plate, circuit substrate material and cured product

摘要

An epoxy resin composition capable of exhibiting excellent tracking resistance and further having TG resistance of 200 ° C. or higher and excellent flame retardant is provided.Containing phosphorus containing epoxy resin and hardenerAn epoxy resin composition wherein the phosphorus content ranges from 1.0 to 1.8%;Epoxy resin containing phosphorusIn the GPC measurement, the ratio (L / h) of more than 7 nuclei (H) and trimer (L) was 0.6 toA novolak type epoxy resin having an average number of functional groups (Mn / E) of 3.8 toAn epoxy resin composition which is a product obtained from the following formula (1) and / or phosphorus compound represented by general formula (2).1