Light-curable polyurethane acrylate resin, preparation method and floor coating

The invention relates to light-curable polyurethane acrylate resin, a preparation method and a floor coating, and belongs to the field of floor coatings. The preparation method comprises the following steps: 1) reacting polyisocyanate containing a uretdione group with polyol under the action of an organic metal catalyst, and then adding an acrylate monomer and a polymerization inhibitor for continuous reaction to prepare photocurable polyurethane acrylate resin containing the uretdione group; and 2) dithiothreitol and the photocurable urethane acrylate resin containing the uretdione group prepared in the step 1) react under the action of an ammonium salt catalyst to prepare the photocurable urethane acrylate resin containing sulfydryl and allophanate groups. The light-curable polyurethane acrylate resin prepared by the invention has good flexibility and elasticity and good adhesive force, and shows excellent mechanical properties in floor coatings. 本发明涉及到一种可光固化聚氨酯丙烯酸酯树脂和制备方法及一种地坪涂料，属于地坪涂料领域。制备方法步骤包括1)含脲二酮基团的聚