Epoxide-free surface-coating binder for cationic electrocoating

Details Epoxide-free surface-coating binder for cationic electrocoating Epoxide-free surface-coating binder for cationic electrocoating

C - Chemistry, Metallurgy

08

L

400/5122, 204/97

C08L 61/34 (2006.01) C08G 59/40 (2006.01) C08L 63/00 (2006.01) C08L 75/04 (2006.01) C09D 5/44 (2006.01) C09D 163/00 (2006.01)

Patent

CA 1074489

ABSTRACT OF THE DISCLOSURE: Surface-coating binders based on a reaction product of Mannich bases, obtained from polyhydric phenols, secondary amines and formaldehyde, with epoxy resins. The Mannich bases and/or the epoxy resins carry hydroxyl groups, bonded to aliphatic structures, which have been converted to ure- thane groups by reaction with partially blocked polyisocyanates. When protonized and diluted with water, the surface-coating bin- ders may be used as cationic electrocoatings.

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