COATING COMPOSITION WITH EXCELLENT CORROSION RESISTANCE

Title:

COATING COMPOSITION WITH EXCELLENT CORROSION RESISTANCE

Document Type and Number:

WIPO Patent Application WO/2012/086494

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a chrome-free coating composition and metal plates coated with the coating composition, said chrome free coating composition: being capable of forming a coating film with excellent corrosion resistance not only on the general parts of a coated metal plate, but on processed parts and the ends; and being particularly effective in improving the corrosion resistance of steel sheets that have not been subjected to plating, or steel sheets subjected to plating composed mainly of aluminum. As a means of solving such a problem, a coating composition containing (A) a coating film-forming resin containing a hydroxyl group, (B) a cross-linker, and (C) an anti-corrosive pigment mixture is provided, said coating composition being characterized in that the anti-corrosive pigment mixture (C) comprises: (1) at least one type vanadium compound selected from a group comprising vanadium pentoxide, calcium vanadate, magnesium vanadate, and ammonium metavanadate; (2) a phosphoric acid-containing metal salt containing at least magnesium, said salt being a salt of at least one type of acid selected from a group comprising phosphoric acid, phosphorous acid, and triphosphoric acid; and (3) silica with magnesium ion exchanging capacity.

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Inventors:

MATSUDA HIDEKI (JP)

Application Number:

PCT/JP2011/078924

Publication Date:

June 28, 2012

Filing Date:

December 14, 2011

Export Citation:

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Assignee:

KANSAI PAINT CO LTD (JP)
MATSUDA HIDEKI (JP)

International Classes:

C09D201/06; C09D7/12; C09D7/80; C09D163/00; C09D167/00

Foreign References:

JP2008222833A	2008-09-25
JP2009220518A	2009-10-01
JP2008284539A	2008-11-27
JP2009051196A	2009-03-12

Attorney, Agent or Firm:

SAEGUSA & PARTNERS (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)

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