| 摘要 |
PROBLEM TO BE SOLVED: To produce the subject resin excellent in oxidation resistance, heat resistance, hardenability or the like, and useful as a hardening agent of an epoxy resin and a raw material for the epoxy resin by reacting a mixture of bischloromethylbiphenyl with a phenol in a specific amount based on the bischloromethylbiphenyl. SOLUTION: A mixture of (A) 4,4'-bischloromethylbiphenyl and (B) phenol in an amount of 3-5 molar times as much as the component A is reacted preferably by using 10-50 wt.% lower alcohol (e.g. ethanol and isopropyl alcohol) based on the amount of the phenol at 55-150 deg.C (at 55-95 deg.C when the reaction solvent is used) to provide the objective resin of the formula (n is the number of repeating units). Preferably, a raw material as the component A comprises >=95 wt.% 4,4'-bischloromethylbiphenyl, <=3 wt.% monochloromethylbiphenyl, and <=2 wt.% bischloromethylbiphenyl isomer except the 4,4'- bischloromethylbiphenyl.
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