Special epoxy resin for UV-curable waterborne coatings and preparation method and application thereof

The invention discloses a special epoxy resin for UV-curable waterborne coatings and a preparation method and application of the special epoxy resin. In the invention, epoxy resins containing benzene rings, taken as raw materials, are chemically modified to obtain epoxy acrylic resin with a light color. The epoxy acrylic resin is reactive with succinic anhydride to synthesize modified epoxy resin with succinic anhydride which then forms salt to obtain the special epoxy resin for the UV-curable waterborne coatings. Curved films prepared by the special epoxy resin can meet the demands of application, and can be applied in plastic paint, coating varnish, paper coating, wood board coating and the like. The preparation method simplifies operation, shortens time, and reduces consumption of polymerization inhibitors and catalytic agents. The special epoxy resin for the UV-curable waterborne coatings by the method is water soluble, thereby reducing consumption of organic solvent, and better meeting environmental protection requirements.