Process for coating electrically conductive substrates

Details Process for coating electrically conductive substrates Process for coating electrically conductive substrates

C - Chemistry, Metallurgy

08

G

C08G 59/40 (2006.01) C08G 18/10 (2006.01) C08G 18/58 (2006.01) C09D 5/44 (2006.01) C09D 163/00 (2006.01) C25D 13/06 (2006.01)

Patent

CA 2059287

The invention relates to a cathodic electro-dipcoating process, wherein the electro-dipcoating composition used contains a cationic, amine-modified epoxy resin, which is obtainable by reacting (A) a polyepoxide, (B) an amine and (C) an adduct, which is obtainable by ... (sic) (c1 ) a polyether- or polyester-polyol, (c2) a polyisocyanate and (c3) a compound which contains at least one hydrogen atom which is reactive towards isocyanate groups and at least one ketimine group in the molecule, and/or (D) a hydrolysis product of (C) with one another in a relative proportion such that 20 to 90% of the epoxy groups of component (A) are reacted with component (B) and the remaining epoxy groups are reacted with component (C) and/or (D), and - if still necessary - at least partially protonating the reaction product thus obtained.

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