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. 10, 2005
Filed:
May. 30, 2001
Hirokazu Yano, Ichi-kawa, JP;
Yoshikatsu Udagawa, Ichi-kawa, JP;
Minoru Kiyotsuka, Ichi-kawa, JP;
Kiyoshi Takatsu, Ichi-kawa, JP;
Hirokazu Yano, Ichi-kawa, JP;
Yoshikatsu Udagawa, Ichi-kawa, JP;
Minoru Kiyotsuka, Ichi-kawa, JP;
Kiyoshi Takatsu, Ichi-kawa, JP;
Nisshin Steel Co., Ltd., Tokyo, JP;
Abstract
A paint composition containing a corrosion inhibitor A prepared from porous silica particles, to which Ca ion is bonded by ion-exchange, and a polyphosphate B preferably at an A/B weight ratio of 60/40 to 5/95 and at an A+B ratio of 5-150 parts by weight based on 100 parts by weight of resinous components. A base metal sheet is preferably one pre-treated with a chemical agent containing at least one fluoroacid. Since the polyphosphate B controls dissolution of Ca ion, an effect of Ca ion on corrosion inhibition is maintained over a long term. The painted metal sheet does not put harmful influences on the environment, since it does not contain chromium compounds.