Abstract: The invention relates to cathodically electrodepositable coating compositions comprising an aqueous dispersion of self-crosslinkable resin. The self-crosslinkable resin is amine and epoxide functional and prepared by reacting epoxide resin with fatty amidopolyamine at about room temperature so as to form a partially crosslinked resin, wherein at least about 50 percent of the amine groups have been neutralized with a water soluble acid. The partially crosslinked resin can be deposited from the bath onto a metal substrate and cured at elevated temperatures to form a coating offering excellent corrosion protection and having excellent adhesion to the substrate.

Abstract: The invention relates to cathodically electrodepositable coating compositions comprising an aqueous dispersion of self-crosslinkable resin. The self-crosslinkable resin is amine and epoxide functional and prepared by reacting epoxide resin with polyamine at about room temperature, wherein at least 50 percent of the amine groups have been neutralized with water soluble acid. The polyamine contains at least one primary amine group and at least one tertiary amine group. The partially crosslinked resin product can be deposited on a metal substrate and cured at elevated temperatures to form a coating offering excellent corrosion protection and having excellent adhesion to the substrate.