Electrocoat composition and process replacing phosphate pretreatment
AssigneeBASF SE
InventorsTimothy S. December, Abdellatif Chouai, Cynthia A. Stants
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Abstract
An aqueous electrodeposition coating composition comprising a cathodically electrodepositable binder, the binder comprising a phosphorylated resin and a carboxyl group separated by from 2 to 4 carbons from an ester group, provides corrosion protection equivalent to that obtained by the conventional phosphate pretreatment-electrodeposition coating process.
Claims25
An aqueous coating composition comprising a binder, the binder comprising a phosphorylated resin and a carboxyl group separated by from 2 to 4 carbons from an ester group.
An aqueous coating composition comprising a resin having at least one group
- in which X is a hydrogen, a monovalent hydrocarbon, or an oxygen atom having a single covalent bond to the phosphorous atom, and each oxygen atom has a covalent bond to a hydrogen atom, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, or the amine-functional resin, with the caveat that at least one oxygen atom has a covalent bond to the resin and at least one carboxyl group separated by from 2 to 4 carbons from an ester group.
Dependencies are inferred from the claim text.