Acrylic-modified epoxy-polyamine resin

An acrylic-modified epoxy-polyamine resin comprises: (A) a bisphenolic epoxy resin containing at least two epoxy groups per molecule; (B) an acrylic resin having on average at least one functional group per molecule, which group is capable of reacting with an epoxy group, the molecular weight distribution of the acrylic resin as expressed by weight average molecular weight (Mw)/number average molecular weight (Mn) being from 1 to 1.2; and (C) an active hydrogen-containing amino compound wherein (B) and (C) are bound to at least a proportion of the epoxy groups of the resin (A). The resin may be in an aqueous dispersion or solution and may further optionally contain a non-ionic film-forming resin. Such dispersions are useful for cationic electrodeposition paint which can form a coating excelling in weatherability and corrosion resistance.