| 摘要 |
PURPOSE:To obtain an epoxy resin having both excellent heat resistance and low water absorption ratio, by adding an epihalohydrin to a specific aminonaphthol and reacting the addition product with an aqueous solution of caustic soda. CONSTITUTION:An epihalohydrin (preferably epichlorohydrin) is added to an aminonaphthol (e.g. 5-amino-1-naphthol, etc.) shown by formula I (Ar is naphthalene; R1 and R2 are H, halogen or 1-3C alkyl; m is 1-3; n is 1 or 2) and then reacted with an aqueous solution of caustic soda to give the aimed epoxy resin shown by formula II (G is glycidyl). The amount of the epihalohydrin used is preferably 2-5 equivalents based on sum of active hydrogen of the aminonaphthol.
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