Surface-coating binders and their use for cathodic...

C - Chemistry – Metallurgy – 25 – D

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402/44, 400/5122

C25D 13/06 (2006.01) C08G 14/06 (2006.01) C08G 59/62 (2006.01) C08L 61/34 (2006.01) C09D 5/44 (2006.01) C09D 163/00 (2006.01)

Patent

CA 1105179

ABSTRACT OF THE DISCLOSURE: Surface-coating binders and their use. The binders are reaction products of (A) Mannich bases obtained from one or more condensed phenols, free from either groups, which contain two or more pheno- lic hydroxl groups per molecule, one or more butadiene or isoprene homopolymers or copolymers which contain one or more Image groups per molecule and have a mean molecular weight of from 500 to 6,000, one or more secondary amines which contain one or more hydroxyalkyl groups per molecule, or a mixture of such secondary amines with another secondary amine, and formaldehyde or a formaldehyde donor, with (B) one or more epoxy resins. These surface-coating binders are used especially for the cathodic electrocoating of metal articles.

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