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AssigneeBASF Coating GmbH
InventorsTakahiro Tsujita, Nobuhiro Nishida, Yoshitomo Takeuchi, Katsuhiko Ohsawa
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To provide a chromium-free paint composition which can provide paint films which are excellent in terms of corrosion resistance on the edge surfaces, scratched surfaces and worked parts of a pre-coated steel sheet, and the paint films which can be obtained by coating this chromium-free paint composition. A chromium-free paint composition which includes paint film-forming resin (A), anti-rust pigment (B), comprising at least one type of amorphous MgO—V2O5-based compound, and crosslinking agent (C) which is characterized in that the mass content proportion of the aforementioned anti-rust pigment (B) is from 10 to 80 mass % with respect to the sum of the resin solid fraction mass of the aforementioned paint film-forming resin (A) and the aforementioned crosslinking agent (C), and the overall eluted ion content in a 10% aqueous solution of the aforementioned anti-rust pigment (B) is from 10 ppm to 100 ppm.
A chromium-free paint composition comprising a paint film-forming resin (A), an anti-rust pigment (B), that comprises at least one type of amorphous MgO—V2O5-based compound, and a crosslinking agent (C), wherein the mass content proportion of the anti-rust pigment (B) is in the range of from 10 to 80 mass % with respect to the sum of the resin solid fraction mass of the paint film-forming resin (A) and the crosslinking agent (C), and wherein the overall eluted ion content in a 10% aqueous solution of the anti-rust pigment (B) is from 10 ppm to 100 ppm.
A paint film that has been obtained by coating the chromium-free paint composition according to 1.
Dependencies are inferred from the claim text.