Cathodic electrodeposition coating compositions containing bismuth compounds and dicarboxylic acids, production and use thereof
AssigneeE. I. Du Pont de Nemours and Company
InventorsHorst Lehmann, Klausjoerg Klein
Life of this patent
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Abstract
Waterborne cathodic electrodeposition (CED) coating compositions comprising resin solids and optionally pigments, fillers and conventional coating additives, wherein said CED coating compositions comprise at least one bismuth compound in a quantity of 0.1 to 2.5 wt. %, calculated as bismuth and relative to resin solids content, together with at least one dicarboxylic acid selected from among acyclic dicarboxylic acids with 3 to 7 carbon atoms and dicarboxylic acids with 8 to 10 carbon atoms comprising a cyclic structural unit in a quantity of 3 to 15 equivalent-%, relative to the acid equivalents present in the CED coating composition.
Claims8
Waterborne cathodic electrodeposition (CED) coating compositions comprising resin solids and optionally pigments, fillers and conventional coating additives, wherein said CED coating compositions comprise at least one bismuth compound in a quantity of 0.1 to 2.5 wt. %, calculated as bismuth and relative to resin solids content, together with at least one dicarboxylic acid in a quantity of 3 to 15 equivalent %, relative to 100 equivalent % of acid present in the CED coating composition, wherein the at least one dicarboxylic acid is selected from the group consisting of acyclic dicarboxylic acids with 3 to 7 carbon atoms and dicarboxylic acids with 8 to 10 carbon atoms comprising a cyclic structural unit.
Dependencies are inferred from the claim text.