| abstract |
Kind Code: A1 A bismuth catalyst having resistance or at least increased resistance to undesired types of ions that occur in a pretreatment material used to produce a conversion layer on a metal substrate. Provide CED coating agent. The present invention relates to an aqueous CED coating comprising resin solids and optional pigments, fillers and / or conventional coating additives. The CE The D coating agent comprises at least one bismuth complex having a ligand selected from the group consisting of hydroxyquinoline, 1,2-dioxime, 1,3-dioxime, and N, N'-diarylthiocarbazide and combinations thereof. , Calculated as bismuth, in an amount of 0.1% to 2.5% by weight based on the resin solids. |