| 摘要 |
PURPOSE:To decrease the hydrophilicity on a surface so as to prevent tarnish and to improve the water resistance and adhesiveness of an inorg. coating film by bringing a reactive org. compd. having a fluorine substituent into reaction with said film or bringing a hydrogen fluoride and/or metallic fluoride into reaction therewith. CONSTITUTION:The reactive org. compd. having the fluorine substituent or the hydrogen fluoride and/or metallic fluoride is brought into reaction with the inorg. coating film. The reactive org. compd. having the fluorine substituent refers to the compd. having the functional group which can react with the -OH group on the surface of the inorg. coating film and decreases the surface energy by the fluorine substituent. The -OH group having large polarity is exposed on the surface of the inorg. coating film, for example, SiO2 film and the tarnish is explained to arise as said group is liable to adsorb the impurities contained in water. The surface of the inorg. coating film is, therefore, substd. with the group having the small polarity or hydrophobic characteristic by which the tarnish and eventually the penetration of water are prevented and the adhesiveness and durability of the film are improved. |
