| 摘要 |
PURPOSE:To provide a coating compsn. which has an excellent oil stain decomposing activity on the inner surface of a cooking utensil heated in use, such as an oven, by dispersing a particular powdery mixture of a perovskite oxide and a heteropolyacid in a heat-resistant binder. CONSTITUTION:A powder mixture of a porovskite oxide of formula I or II (wherein 0<=x<1) and a heteropolyacid of formula III is dispersed in a heat- resistant binder, thereby obtaining the desired coating compsn. Oil decomposition can be performed at 400 deg.C by forming a coating layer derived from the coating compsn. on the inner surface of a cooking utensil heated in use, such as an oven, whereas at least 500 deg.C is required according to the conventional burning off method. Thus, it becomes possible to choose design parameters more freely. Moreover, since oil stain can be completely decomposed, it is possible to keep the interior of the oven clean. a silica sol is suitably used as the heat-resistant binder.
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