Ppg Industries Ohio, Inc.

Steven D Perrine

Michael J Pawlik

Ralph C Gray

Richard M Nugent, Jr

Dennis W Jones

Ellor James Van Buskirk

James E Jones

Kathleen M Coldren

Richard F Karabin

Alan J Kaylo

Nathan J Silvernail

Kevin J Dufford

Daniel L Hopkins

The present invention is directed to an electrodepositable coating composition comprising a bismuth salt and a stabilizing agent, and wherein the molar ratio of elemental bismuth to the stabilizing agent is not less than 1:0.25.

Electrodepositable coating composition comprising a bismuth salt and a stabilizing compound

A corrosion resistant, alkali resistant coating composition is disclosed. The composition comprises a binder comprising a reaction product of an epoxy-containing material and a phosphorus-containing material together with a curing agent. Aminoplasts, especially melamine-based aminoplasts, are particularly suitable curing agents. A source of silicon can optionally be included. The compositions also provide excellent adhesion and can be used with or without a weldable primer. The compositions are applied to and cured on a metal substrate.

Corrosion and alkali-resistant compositions and methods for using the same

A weldable coating composition is disclosed. The composition comprises a binder in which is dispersed a conductive pigment and a source of silicon. Enhanced corrosion protection is offered, without sacrificing weldability of the coating layer. The composition is applied to and cured on a metal substrate.

Weldable compositions comprising a conductive pigment and silicon and methods for using the same

A curable coating composition is disclosed comprising a resinous binder comprising (a) a reaction product of an epoxy-containing polymer with a compound containing phosphorus acid groups, the reaction product having reactive functional groups, and (b) a curing agent having functional groups reactive with the functional groups of (a). An electroconductive pigment is dispersed in (a) such that the weight ratio of the electroconductive pigment to (a) plus (b) is within the range of 0.5 to 9.0:1. When the curable coating composition is deposited and cured on a metal substrate, the cured coating is weldable.

Curable, weldable coating compositions

Weldable coating of phosphated epoxy polymer, curing agent and electroconductive pigment

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Allison Park, PA, United States of America

Steven D Perrine