Water-based antiviral varnish and preparation method thereof

The invention discloses water-based antiviral varnish and a preparation method thereof, and belongs to the technical field of varnish, the water-based antiviral varnish comprises a water-based polyurethane emulsion and a composite antiviral agent, and the composite antiviral agent comprises nano silver, nano silicon dioxide, a reducing agent, amino acid, potassium salt and alkyl dimethyl benzyl ammonium chloride. According to the water-based antiviral varnish, the compound antiviral agent with an antiviral effect is added, so that the varnish has an excellent antiviral function, not only is high in antiviral rate and good in broad-spectrum antibacterial property, but also has relatively good high-temperature resistance and weather resistance, is free of irritation and is more environment-friendly due to the fact that main components of the varnish are inorganic substances. Meanwhile, the composite antiviral agent adopts nano silicon dioxide as a carrier, and an amino acid stabilizer and potassium salt are add