| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystalline epoxy resin which has a low melt viscosity and can give a cured product excellent in heat resistance and to provide an epoxy resin composition containing the same. SOLUTION: The crystalline resin is obtained by using a raw material being a tetrafunctional compound which is obtained by the condensation of glyoxal with phenol and in which the proportion of a component in which the reaction sites of phenol are para positions is at least 95%, reacting the raw material with epichlorohydrin in the presence of an alkali metal, removing unreacted epichlorohydrin from the reaction mixture in a vacuum under heating, and depositing crystals by adding an organic solvent. COPYRIGHT: (C)2004,JPO
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