CORROSION-RESISTANT MULTILAYER VARNISH AND METHOD FOR THE PRODUCTION THEREOF
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Dec 24, 2009
filing date -
Feb 5, 2009
priority date (Note) -
Abandoned
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Abstract
An electroless deposition coating is applied in a first stage with an aqueous corrosion preventative (K1), comprising at least one compound (A1) having a lanthanide metal cation and/or a d-element metal cation and/or a d-element metallate as anion, and at least one acid (A2) capable of oxidation; a further electroless deposition coating is applied in a second stage with an aqueous corrosion preventative (K2) which comprises at least one preferably water-dispersible and/or water-soluble polymer (P) having covalently bonded ligands (L) which form chelates with the metal ions released on corrosion of the substrate, and/or with the substrate surface, and having functional groups (B), and at least one water-dispersible and/or water-soluble crosslinker (V) having functional groups (B′) which react with the functional groups (B) of the polymer, and having covalently bonded ligands (L′) which form chelates with the metal ions released on corrosion of the substrate, and/or with the substrate surface.
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