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:
Sep. 02, 2003
Filed:
Mar. 27, 1997
Motoyuki Sakatoku, Mie, JP;
Kenichi Hayashi, Mie, JP;
Yoshihisa Tamura, Mie, JP;
Yutaka Mori, Osaka, JP;
Central Glass Company, Limited, Ube, JP;
Abstract
The invention relates to a coating composition for preparing a back coating film of a mirror. This mirror serving as an anticorrosive mirror has a glass substrate, a silver mirror film that comprises silver and is formed on a back surface of the glass substrate, a metallic protective film that comprises a first metal and is formed on the silver mirror film, and the back coating film formed on the metallic protective film. The coating composition is substantially free of a lead component and comprises (a) a vehicle containing a synthetic resin, (b) a first salt formed by a neutralization of an acid with a base containing a second metal having an ionization tendency that is greater than the silver and the first metal, and (c) a basic compound selected from the group consisting of azoles and diamines. The acid is one compound selected from the group consisting of organic acids each containing an azole ring and unsubstituted and substituted carbamic acids. The mirror has advantageous characteristics, in mechanical processability and chemical and mechanical durabilities, which are comparable to those of a mirror having a back coating film containing a lead pigment.