Patent ID: 8546510

Claim:
A crystalline resin cured product which is characterized in that the crystalline resin cured product contains a unit formed by the reaction of an aromatic diglycidyl compound with an aromatic dihydroxy compound and represented by the following general formula (2) in an amount of 50 wt % or more of the whole, and has a distinct melting point due to growth of the crystal domain, softens at a temperature above its melting point as the result of a loss of the crystal phase, and has a heat distortion temperature without clearly showing fluidity and, when analyzed by differential scanning calorimetry, the crystalline resin cured product absorbs a heat quantity of 10 J/g or more calculated on the basis of the resin components of the crystalline resin cured product as the crystals of the crystalline resin cured product melt and the endothermic peak appears in the range of 120 to 320° C., the reaction is performed at a temperature that is in the range of 60 to 250° C. and lower than the melting point of the crystalline resin cured product by 10 to 100° C.: in general formula (2), A and B are divalent aromatic groups and they may be identical with or different from each other and wherein the aromatic diglycidyl compound and the aromatic dihydroxy compound are mixed in a ratio of 0.8 to 1.2 moles of the hydroxyl groups in the dihydroxy compound per 1 mole of the glycidyl groups in the aromatic diglycidyl compound; and wherein the aromatic diglycidyl compound or the aromatic dihydroxy compound or both contain a unit represented by the following general formula (3): in general formula (3), X is a linking group selected from a direct linkage and an ether linkage and n is an integer of 1 to 3.