Curing resin and curing resin-composition.

摘要

A curing resin obtained in the following manner, 100 parts by weight of at least one material (component A) selected from the group consisting of a five-membered cyclic compound having conjugated double bonds which is represented by the general formula: wherein R represents alkyl having 1 to 3 carbon atoms, and m and n stand for 0 or for an integer of 1 to 6 and m+n = 6, and addition products thereof formed by the Diels-Alder reaction, 0 to 50 parts by weight of an aromatic compound (component A min ) having at least one polymerizable carbon-carbon double bond and 2 to 120 parts by weight of a compound (component B) having at least one polymerizable carbon-carbon double bond and at least one hydroxy group are polymerized under heating; the obtained cyclopentadiene resin (R1) having hydroxy groups and/or the resin (R1 min ) having hydroxy groups obtained by selective hydrogenation of only the double bonds in the said resin (R1) is reacted with a polyisocyanate compound (component C) at an equivalent ratio of the isocyanate groups in the component C in the range of 0.02 to 0.95 based on the hydroxy groups in the resin R1 and/or R1 min ; the thus obtained resin (R2) is then esterified with an alpha , beta -unsaturated carboxylic acid (component D) at an equivalent ratio of carboxyl groups in the component D in the range of 0.1 to 1.1 based on the hydroxy groups in the resin (R2).