Self-crosslinkable electrocoat resins prepared by room...

C - Chemistry – Metallurgy – 25 – D

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C25D 13/06 (2006.01) C08L 63/00 (2006.01) C08L 79/02 (2006.01) C09D 5/44 (2006.01) C23F 13/00 (2006.01) C23F 13/02 (2006.01)

Patent

CA 1280842

Abstract of the Disclosure 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.

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