U.S. 8,142,897 B2
Henkel KGaA has received a patent for a chromium-free, curable corrosion protection agent for the first coating of metallic substrates. The corrosion protection agent has a pH in the range of from 1 to 3 and containing water and components: fluoro complex ions of titanium and/or zirconium, at least one corrosion protection pigment, at least one organic polymer or copolymer which is water-soluble or water-dispersible in the specified pH range and which as such in aqueous solution in a concentration of 50% weight and has a pH in a range from 1 to 3, an at least one polyvinyl amine comprised of amino groups that are acylated, the polyvinyl amine has a molecular weight of greater than 100,000 g/mol but not greater than 1,000,000 g/mol and a degree of acylation of not less than 80%.
Henkel patents corrosion protection agent for coating metallic substrates
Published October 10, 2012
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