Light-cured urethane acrylate aqueous dispersion and preparation method thereof

The invention discloses a photo-cured urethane acrylate aqueous dispersion and a preparation method thereof, the method comprises the following steps: reacting double-terminal epoxy organic silicone oil with single-terminal carboxyl organic silicone oil to obtain a hydroxyl-containing modified organic silicon intermediate A; reacting a caprolactone monomer with hydroxyl-containing acrylate to obtain a hydroxyl-containing modified acrylate monomer B; mixing diisocyanate, dimethylolpropionic acid and the hydroxyl-containing modified organic silicon intermediate A, and performing a reaction to obtain an organic silicon grafted polyurethane prepolymer; adding a polymerization inhibitor, an antioxidant and a hydroxyl-containing modified acrylate monomer B into the organosilicone grafted polyurethane prepolymer, and performing a reaction to obtain terminated urethane acrylate; and adding organic amine and deionized water into the terminated urethane acrylate, and performing a reaction to obtain the photo-cured uret