Ppg Industries, Inc.

Edward L Jozwiak, Jr

Suryya K Das

Kurt Gordon Olson

Craig A Wilson

Jeffrey G Koren

Debra M Longhini

Carol S Dugan

James M Delaney

In a method for electrocoating an electrically conductive surface serving as an electrode, which method comprises passing an electrical current between the electrically conductive surface to be electrocoated and a counter electrode in contact with an electrodeposition bath comprising a synthetic resin ionically dispersed in an aqueous medium, wherein improvement comprises (a) adding a complexing agent, and then (b) removing at least a portion of the complexing agent along with metals coordinated therewith from the bath.

Method for treatment of electrodeposition bath

A process for applying a non-electrophoretic top-coating over an electrophoretically applied base coating and curing the composite coating by employing a single curing step is disclosed.

Process for topcoating an electrocoated substrate with a high solids

Polymeric products are prepared by polymerizing in aqueous medium under addition polymerization conditions a dispersed phase of a polymerizable, ethylenically unsaturated monomer or mixture of polymerizable, ethylenically unsaturated monomers in the presence of an at least partially neutralized adduct of a polyepoxide and a primary and/or secondary amine and which contains unsaturation. The polymeric products are useful in water-based coating compositions particularly for use in cationic electrodeposition.

Cationic polymers and their use in electrodeposition

A method of preparing resinous vehicles in aqueous medium by addition polymerizing a material having CH.sub.2 .dbd.C&lt; moieties with a partially neutralized reaction product of an unsaturated carboxylic acid or anhydride and polybutadiene is disclosed. The resinous vehicles are prepared in a manner such that they are useful for electrodeposition.

Method for electrodeposition

A method of preparing resinous vehicles in aqueous medium by addition polymerizing a diene with a partially neutralized reaction product of an unsaturated carboxylic acid or anhydride and a drying oil is disclosed. The resinous vehicles are prepared in the presence of an oil-soluble free radical polymerization catalyst and have properties necessary for electrodeposition.

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Gibsonia, PA, United States of America

Edward L Jozwiak, Jr