Cationic paint additives
AssigneeAllnex Austria GmbH
InventorsWillibald Paar, Roland Feola
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Abstract
The invention relates to process for the reduction of corrosion of base metals comprising coating the surfaces of a base metal part with a cathodic electrodeposition paint comprising a cationic paint additive C which is a plastified reaction product of epoxide resins E and amines A, wherein the reaction products of epoxides E and amines A further comprise moieties of aromatic or aliphatic dihydroxy or polyhydroxy compounds D, and preferably also of fatty acids F having from six to thirty carbon atoms, and optionally, one or more olefinic unsaturations, and wherein at least a part of the plastifier P is incorporated by chemical reaction within the reaction products of epoxide resins E and amines A.
Claims18
A process for reducing corrosion of base metals comprising coating a surface of a base metal part with a cathodic electrodeposition paint comprising cationic binders,
- wherein a cationic paint additive C is added to the electrodeposition paint, said cationic paint additive C being a plastified reaction product of epoxide resins E and amines A, wherein the reaction product of epoxide resins E and amines A further comprises moieties of aromatic or aliphatic dihydroxy or polyhydroxy compounds D, and at least a part of a fatty acid amidoamine plastifier P is incorporated by chemical reaction within the reaction product of epoxide resins E and amines A,
- wherein the reaction product of epoxide resins E and amines A optionally further comprises moieties of fatty acids F having from six to thirty carbon atoms, and optionally, one or more olefinic unsaturations.
Dependencies are inferred from the claim text.