Amine acid zwitterion additive for a cathodic electrocoating composition
AssigneeE.I. du Pont de Nemours and Company
InventorDing Yu Chung
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Abstract
This invention is directed to an improved aqueous cathodic electrocoating composition and a method for the electrodeposition of this composition; the composition comprises a cathodic electrodepositable composition comprising a binder of (a) a cathodically electrodepositable film forming resin and (b) a polyisocyanate crosslinking agent blocked with a compound that is non-hazardous and non-air polluting, such as, an alkoxy alkanol or an alkyl alcohol; wherein the improvement comprises the use of 0.1-5.0% by weight, based on the weight of the binder, of a water miscible amine acid zwitterion additive which is the reaction product of an amine acid and an alkylglycidy ether.
Claims10
An aqueous cathodic electrocoating composition comprising a binder of (a) a cathodically electrodepositable film forming resin and (b) a polyisocyanate crosslinking agent blocked with a non-hazardous, non-air polluting compound and 0.1-5.0% by weight, based on the weight of the binder, of a water miscible amine acid zwitterion additive comprised of the reaction product of an amine acid and an alkylglycidy ether.
Dependencies are inferred from the claim text.