| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable formation of a coated film which shows excellent durability when applied not only to places and substances insusceptible to friction such as wall surfaces and nails but also even to articles frequently susceptible to friction such as vehicles such as automobiles and trains run by electricity, portable machines such as portable telephones, electronic pocket notebooks and portable electronic computers and, simultaneously, can reversibly change in color upon immediate reaction with the presence or absence of sun light and artificial light, particularly irradiation with ultraviolet rays. SOLUTION: This ultraviolet reversibly color changeable composition comprises 0.1-5 wt.% naphthopyran compound, 0.9-10 wt.% animal or vegetable oil and fat and balance acrylic resin vehicle. The animal or vegetable oil and fat is at least one member selected from the group consisting of a fish liver oil, a vegetable oil and an aliphatic hydrocarbon to be obtained by the isolation from the animal or vegetable oil, and the acrylic resin vehicle is composed of an acrylic resin and an organic solvent.</p> |
