| 摘要 |
PURPOSE:To obtain the titled material having a good green storage property by supporting a spiropyrane compd. and an aromatic diazosulfonate on a substrate using a polyvinyl alcohol as a binder. CONSTITUTION:The titled material is formed by supporting the spiropyran compd. and the aromatic diazosulfonate on the substrate using the polyvinyl alcohol which has <=200 a polymerization degree, and 50-70mol% a saponification value. The used spiropyrane compd. is for example, a benzospiropyrane and is excluded the compd. which is colored in a bright room at a room temp. and is decolored in a dark room. While, the aromatic diazosulfonate is a sodium benzene diazosulfonate having 2-methoxy substituent. If the polymerization degree of the polyvinyl alcohol is >=200, as the viscosity of a coating solution becomes too high, the coating of said solution becomes difficult, thereby depressing the uniformity of the coating. |
