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:
Dec. 06, 2016
Filed:
Feb. 25, 2011
Toru Imokawa, Tokyo, JP;
Nobue Fujibayashi, Tokyo, JP;
Takahiro Kubota, Tokyo, JP;
Etsuo Hamada, Tokyo, JP;
Masayasu Nagoshi, Tokyo, JP;
Toru Imokawa, Tokyo, JP;
Nobue Fujibayashi, Tokyo, JP;
Takahiro Kubota, Tokyo, JP;
Etsuo Hamada, Tokyo, JP;
Masayasu Nagoshi, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
The present invention provides a chromium-free surface treatment agent, comprising: a resin compound having a specific bisphenol skeleton; cationic urethane resin emulsion; silane coupling agent; an organic titanium chelate compound; a quadrivalent vanadyl compound; a molybdic acid compound; and water, wherein these components are blended at predetermined ratios such that pH value of the surface treatment agent is in the range of 4 to 5. The one-pack type chromium-free surface treatment agent of the present invention exhibits good stability during storage and is capable of forming on a metal material surface a coating film excellent in corrosion resistance at a bending-processed portion of a steel sheet, solvent resistance and paintability after alkali degreasing.