Process for the preparation of self-cross-linking resinous binders, thermosetting compositions and their use in coating surfaces.

摘要

Catalytically self-cross-linking resinous binders are prepared by (A) addition reaction of a primary amine to a beta-hydroxyalkyl ester of an alpha, beta-ethylenically unsaturated acid, and (B) reaction of this secondary amine adduct, optionally in combination with other amines, with an epoxy resin. Thermosetting compositions include the binders and transesterification-promoting metal compounds as curing catalyst. Protonized binders can be used in a cathodic electrodeposition bath. The composition is applied to a surface and the resulting coating cured at temperatures not higher than 200°C.