Patent ID: 8575280

Claim:
A thermosetting resin composition comprising (A) a carboxyl group-containing urethane resin prepared by using (a) a polyisocyanate compound, (b) polyol compounds, and (c) a carboxyl group-containing dihydroxy compound, (B) a curing agent, wherein the polyol compounds (b) are one or more polyol compound(s) selected from Group (I) and one or more polyol compound(s) selected from Group (II); Group (I): polycarbonate polyol, polyether polyol, polyester polyol, and polylactone polyol, Group (II): polybutadiene polyol, polysilicone having hydroxyl groups at both ends, polyol having 18 to 72 carbon atoms and oxygen atoms present only in hydroxyl groups; wherein the carboxyl group-containing urethane resin (A) is selected from the group consisting of the following (i) to (iii): (i) a mixture of a urethane resin prepared by using the polyol compounds of Group (I) and a urethane resin prepared by using the polyol compounds of Group (II), (ii) a block urethane resin obtained by the reaction of one urethane resin having terminal isocyanate groups prepared by using polyol compound of either Group (I) or Group (II) and another urethane resin having terminal hydroxyl groups prepared by using the other polyol compound with each other, and (iii) a carboxyl group-containing urethane resin obtained by starting a reaction using the polyisocyanate compound with a first polyol compound of either Group (I) or Group (II) and, after a conversion of the hydroxyl group of the polyol compound becomes 50% or more, further reacting the polyisocyanate compound with the other polyol compound of either Group (I) or Group (II), wherein the other polyol compound is from the group that is different from the first polyol compound; and wherein the curing agent (B) is an epoxy compound having two or more epoxy groups per molecule.