| 摘要 |
PROBLEM TO BE SOLVED: To provide a moisture-curable urethane coating material excellent in adhesion to an over-coating material, even when there is a long interval between the application of the coating material and the application of the over-coating material.SOLUTION: A moisture-curable urethane coating material comprises: an urethane prepolymer (A) that has an isocyanate group and is obtained by reacting polyisocyanate and polyoxyalkylene polyol; an urethane compound (B) that has at least one oxazolidine group and is obtained by reacting polyisocyanate, polyoxyalkylene polyol and N-2-hydroxyalkyloxazolidine; and an acid catalyst (C), wherein the total molar ratio of amino groups and hydroxyl groups, which are produced by ring-opening of an oxazolidine ring in the urethane compound (B) induced by water, to 1 mol isocyanate group in the urethane prepolymer (A) is 1.1-1.6. |
