| abstract |
PROBLEM TO BE SOLVED: To obtain a smooth surface without volume shrinkage by obtaining fluidity, applicability, and polishing after applying a putty agent without applying a large amount of a putty agent to a defective portion. . SOLUTION: In an aqueous urethane resin having an anionized carboxyl group and a double bond, the equivalent ratio of the epoxy group to the anionized carboxyl group is 0.02 to 0.7, and the molecular weight is 70 to 70. 4,0 A resin composition comprising an aqueous urethane resin having an anionized carboxyl group and a double bond, a water-soluble polymer compound, and a thermally expandable filler obtained by performing a cross-linking reaction with an epoxy compound of No. 00. |