Tannin mannich adducts for improving corrosion resistance of...

C - Chemistry – Metallurgy – 23 – F

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C23F 11/12 (2006.01) C08G 14/06 (2006.01) C09D 161/34 (2006.01) C23C 22/48 (2006.01) C23C 22/53 (2006.01) C23C 22/60 (2006.01) C23C 22/68 (2006.01) C23F 11/14 (2006.01)

Patent

CA 2002979

ABSTRACT OF THE DISCLOSURE A vegetable tannin is condensed with formaldehyde and an amine to provide an acid soluble product which is useful in a metal treatment solution to enhance corrosion resistance and paint adhesion characteristics of a metal surface.

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