Coated steel sheet and exterior building material
US9765223B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Mar 24, 2014 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Mar 24, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/013
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coated steel sheet comprises: a steel sheet; a primer coating film which is arranged on the steel sheet and comprises an anti-corrosive pigment and an aggregate composed of primary particles; and a top coating film which is arranged on the primer coating film. The anti-corrosive pigment comprises at least one compound selected from the group consisting of a bivalent tin salt, a trivalent vanadium salt, a tetravalent vanadium salt, a tetravalent molybdenum salt, an oxycarboxylic acid salt, an ascorbic acid, a phosphorous acid salt and a hypophosphorous acid salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.