Patent ID: 6951602

Claim:
An aqueous electrodeposition bath comprising (A) a binder, wherein the binder is depositable cathodically or anodically, (B) a dissolved polyvinyl alcohol (co)polymer comprising units of the following structure (I) —[—C(R 1 ) 2 —C(R 1 )(OH)—]—, wherein each R 1 in the structure is independently at least one of hydrogen, an alkyl, a substituted alkyl, a cycloalkyl, a substituted cycloalkyl, alkylcycloalkyl, substituted alkylcycloalkyl, cycloalkylalkyl, substituted cycloalkylalkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, cycloalkylaryl, substituted cycloalkylaryl, arylalkyl, substituted arylalkyl, arylcycloalkyl, and substituted arylcycloalkyl, and (C) optionally at least one of a crosslinking agent and a coatings additive, wherein at least one of: (i) at least one R 1 in the structure is not hydrogen, (ii) the polyvinyl alcohol (co)polymer comprises a reaction product of structure (I) with at least one of a structure (II) —[—C(R 1 ) 2 —C(R 1 )(OC(O)R 2 )—]—, wherein R 1 is as previously defined, and R 2 is a C 1 -C 10 alkyl; a (meth)acrylic acid ester substantially free from acid groups; a monomer that carry at least one hydroxyl group per molecule and that are substantially free from acid groups; a monomer that carry per molecule at least one acid group that can be converted into a corresponding acid anion group; a vinyl ester of a C 5 -C 18 alpha-branched monocarboxylic acid; a cyclic olefin, an acyclic olefin; (meth)acrylamide; a monomer containing an epoxide group; a vinylaromatic hydrocarbon; a nitrile; a vinyl monomer; and/or an allyl monomer, and/or (iii) the polyvinyl alcohol (co)polymer is a copolymer of vinyl alcohol and at least one ethylenically unsaturated monomer.