The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1995
Filed:
Jan. 29, 1993
Ichiro Nakamura, Yokosuka, JP;
Seiji Yamazaki, Matsusaka, JP;
Osamu Takahashi, Matsusaka, JP;
Hiroaki Arai, Matsusaka, JP;
Shigeo Hamaguchi, Matsusaka, JP;
Central Glass Company, Limited, Yamaguchi, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
The invention relates to a multilayered metal oxide film formed on a glass substrate by the sol-gel process. The film has a first metal oxide layer formed on the glass substrate and a second metal oxide layer formed on the first layer. To make the first layer minutely rough, at least two sols are respectively prepared from at least one compound selected from the group consisting of metal alkoxides and metal acetylacetonatos, such that polymers of the sols have different average molecular weights. Then, the at least two sols are mixed with a solvent so as to prepare a first coating solution. The first coating solution is applied to the glass substrate so as to form thereon a first sol film. The thus coated glass substrate is heated so as to transform the first sol film into the first metal oxide layer. To form a water-repellent metal oxide film on the first layer, a silane compound containing a fluorocarbon group is mixed with a solvent so as to prepare a second coating solution. After that, the second coating solution is applied to the first metal oxide layer so as to form thereon a second sol film. Then, the glass substrate is heated so as to transform the second sol film into the second metal oxide layer which is water-repellent.