Urethane acrylate waterborne UV coating and preparation method thereof

The invention relates to a urethane acrylate waterborne UV coating and a preparation method thereof; the urethane acrylate waterborne UV coating comprises the following components according to the parts by weight: 5-25 parts of polyether acrylate, 10-60 parts of urethane acrylate, 2-5 parts of photoinitiator, 0.05-0.5 part of defoaming agent, 0.05-0.5 part of wetting agent and 40-80 parts of deionized water; the preparation method comprises the following steps: weighting each component according to the proportion by weight, then mixing polyether acrylate and urethane acrylate to prepare a mixture, then adding photoinitiator, defoaming agent, wetting agent and waterborne mildewproof agent in the mixture, stirring for 0.5-2h, then slowly dripping deionized water by phase inversion method to disperse the solution and obtaining stable emulsion, wherein, the dripping time of deionized water is 1-3h. The invention is characterized by small investment, simple process, environmental friend and non-toxic, excellent film performance, remarkable economic and social benefits and good market application prospect.