The present invention provides a coating film having a structure represented by the following general formula (1) (in the formula, R11 is a residue formed by removing one isocyanate group from a polyisocyanate, and R12 is an alkyl group or an alkoxy group having 2 to 12 carbon atoms, R13 is a residue formed by removing one hydroxyl group from a polyol), wherein a König hardness of the coating film is 20 or more, in an SS curve measurement of a tensile test, the coating film has an elastic deformation region and a plastic deformation region, and in the SS curve measurement, a stress at an inflection point stress between the elastic deformation region and the plastic deformation region is 5MPa or more.
本发明提供了一种具有以下通式(1)表示的结构的涂膜(式中,R11 是通过从多
异氰酸酯中去除一个
异氰酸酯基团而形成的残余物,R12 是具有 2 至 12 个碳原子的烷基或烷氧基,R13 是通过从多元醇中去除一个羟基而形成的残余物)、其中涂膜的柯尼希硬度为 20 或以上,在拉伸试验的 SS 曲线测量中,涂膜具有弹性变形区和塑性变形区,在 SS 曲线测量中,弹性变形区和塑性变形区之间的拐点应力为 5MPa 或以上。