| 摘要 |
PROBLEM TO BE SOLVED: To provide an epoxy resin that has little change in heat resistance and exhibits low thermal expansion.SOLUTION: The epoxy resin, which results from the polyglycidyl etherification of the polycondensate of biphenol, naphthol compound, and formaldehyde, is characterized by containing polyfunctional compound (X) represented by structural formula (1), the content of the polyfunctional compound (X) being at least 30% by area ratio in a GPC measurement. |
