Ultraviolet light-cured coating and preparation method thereof

The invention relates to an ultraviolet light-cured coating and a preparation method thereof. The preparation method for the ultraviolet light-cured coating comprises the following steps: mixing isophorone diisocyanate with polyester dihydric alcohol diol and carrying out a reaction under stirring so as to obtain a first reaction solution; adding 2,2-bis(hydroxymethyl)propionic acid into the first reaction solution at 70 to 80 DEG C, carrying out a reaction for 1 to 1.5 h, then carrying out cooling to 65 DEG C, adding hydroxyl ethyl methacrylate, pentaerythritol triacrylate, a polymerization inhibitor and a catalyst, carrying out a reaction for 4 to 5 h under a heat preservation condition, then carrying out cooling to 45 to 50 DEG C, adding triethylamine, carrying out a neutralization reaction so as to obtain a second reaction solution and adjusting the pH value of the second reaction solution to 7 to 8 so as to obtain polyurethane acrylate prepolymer; and mixing the polyurethane acrylate prepolymer with active multi-functional monomer at 30 to 50 DEG C, adding a photoinitiator, an auxiliary agent and deionized water after cooling and carrying out mixing under stirring so as to obtain the ultraviolet light-cured coating. The ultraviolet light-cured coating prepared by using the method is environment-friendly.