Ppg Industries, Inc.

William J Geiger

Thomas C Moriarity

Joseph F Bosso

Robert D Jerabek

Aminoplast curable cationic coating compositions are disclosed. The coating compositions contain an onium salt group-containing polymer and an aminoplast curing agent which has at least one group of the structure: ##STR1## wherein R.sub.1 is carbon derived from an aldehyde or a ketone.

Method of electrodeposition employing low temperature aminoplast curable

Low temperature aminoplast curable cationic electrodepositable coating

Ungelled resins, aqueous dispersions of cationic resins, coating compositions, and electrodeposition using the resinous coating compositions are disclosed. The resins are formed from reacting polyepoxides with polyoxyalkylenepolyamines. The aqueous dispersons are prepared by at least partially neutralizing the resins to provide cationic groups and dispersing the cationic resins in aqueous medium. When added to cationic electrodepositable coating compositions, such as high throwpower compositions, the ungelled cationic resins provide better appearing, more flexible and water-resistant electrodeposited coatings.

Ungelled polyepoxide-polyoxyalkylenepolyamine resins, aqueous

Ungelled resins, aqueous dispersions of cationic resins, coating compositions, and electrodeposition using the resinous coating compositions are disclosed. The resins are formed from reacting polyepoxides with polyoxyalkylenepolyamines. The aqueous dispersions are prepared by at least partially neutralizing the resins to provide cationic groups and dispersing the cationic resins in aqueous medium. When added to cationic electrodepositable coating compositions, such as high throwpower compositions, the ungelled cationic resins provide better appearing, more flexible and water-resistant electrodeposited coatings.

Ungelled resins, aqueous dispersions of cationic resins, coating compositions, and electrodeposition using the resinous coating compositions are disclosed. The resins are formed from reacting polyepoxides with polyoxyalkylenepolyamines. The aqueous dispersions are prepared by at least partially neutralizing the resins to provide cationic groups and dispersing the cationic resins in aqueous medium. When added to cationic electrode-positable coating compositions, such as high throwpower compositions, the ungelled cationic resins provide better appearing, more flexible and water-resistant electrodeposited coatings.

Electrodepositable compositions containing small amounts of cellulose acetate butyrate provide coatings having excellent adhesion to the substrate and to conventional topcoat compositions, wherein said cellulose acetate butyrate has a relatively high butyryl content. The electrodepositable compositions are comprised of water dispersible acid or base solubilized synthetic vehicle resins.

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New Kensington, PA, United States of America

William J Geiger