Metal containing integrated electrocoat for better corrosion resistance
AssigneeBASF SE
InventorsAbdellatif Chouai, Timothy S. December, Robert D Schiller
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Abstract
An aqueous electrodeposition coating composition comprising (a) a metal oxide selected from the group consisting of bismuth oxide, vanadium oxide, manganese oxide, cobalt oxide, zinc oxide, strontium oxide, yttrium oxide, molybdenum oxide, zirconium oxide, lanthanum oxide, oxides of the lanthanide series of elements, and combinations of these and (b) a cathodically electrodepositable binder, the binder comprising an amine-functional phosphorylated resin, provides corrosion protection equivalent to that obtained by the conventional phosphate pretreatment-electrodeposition coating process.
Claims11
An aqueous, cathodically electrodepositable coating composition comprising:
- a cathodically electrodepositable binder comprising:
- a resin component comprising:
- an amine-functional phosphorylated resin comprising at least one of a diphosphate ester of a polyepoxide resin, a triphosphate ester of a polyepoxide resin, and a diphosphonic acid ester of a polyepoxide resin;
- and
- a second amine-functional resin that is free from a phosphorous-containing group;
- and
- a crosslinker comprising a blocked polyisocyanate and reactive with at least one of the amine-functional phosphorylated resin and the second amine-functional resin;
- and
- a metal oxide selected from the group consisting of vanadium oxide, manganese oxide, cobalt oxide, zinc oxide, strontium oxide, yttrium oxide, molybdenum oxide, zirconium oxide, lanthanum oxide, oxides of the lanthanide series of elements, and combinations thereof.
Dependencies are inferred from the claim text.