| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new curable resin having excellent heat resistance and mechanical characteristics of cured material and improved flame retardance. SOLUTION: This curable resin is characterized by comprising a dihydronaphthoxazine ring containing a substituent group having at least one terminal acetylene bond, attached to nitrogen constituting the dihydronaphthoxazine ring. The curable resin is exemplified by a curable resin which is represented by formula (1) (R is hydrogen, a 1-6C alkyl group, cyclohexyl group, phenyl group, a substituted phenyl group, naphthyl group or a substituted naphthyl group) and contains an acetynyl group and the dihydronaphthoxazine ring.
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