Organic silicon modified epoxy acrylate aqueous dispersion and preparation method thereof

The invention discloses an organic silicon modified epoxy acrylate aqueous dispersion and a preparation method thereof. The method comprises the following steps of: mixing a polyether epoxy diluent and epoxy resin, and reacting the mixture with a crylic acid monomer to obtain low-viscosity epoxy acrylate prepolymer; performing grafting modification on the low-viscosity epoxy acrylate prepolymer by using maleic anhydride and introducing a hydrophilic group on a molecular chain; mixing micro-molecular amino silicone oil and organic alkali to obtain a neutralizer; and neutralizing the system, adding water for dilution and dispersion, and regulating solid content and viscosity to obtain the UV-curable organic silicon modified epoxy acrylate aqueous dispersion. The organic silicon modified epoxy acrylate aqueous dispersion has high solid content of over 60 percent and low viscosity of between 1,500 and 5,500 mPa.s. A UV cured film has high hardness of between 4H and 6H, high flexibility and water resistance and lo