The application relates to the field of coatings, and specifically discloses a preparation method of a high-
toughness UV
varnish. The specific preparation steps of the preparation method of the high-
toughness UV
varnish are as follows: S1, stirring and mixing deionized water,
methanol and tetramethoxysilane and adding
hydrochloric acid dropwise, and performing rotary
evaporation, concentration andgelling to obtain a modified
aerogel; S2, stirring and mixing the dry
aerogel and
titanium dioxide and performing
grinding and sieving, and performing hydrophobic modification treatment to obtain a mixed gel solution; S3, using
butyl acrylate,
acrylic acid and
methyl methacrylate as monomers to obtain modified polyacrylate by
radical polymerization; and S4, separately weighing UV
acrylate, the modified polyacrylate,
ethyl acetate,
butyl acetate,
methyl isobutyl ketone, diisobutyl
ketone, a photo-initiator and a leveling agent, and performing stirring and mixing to obtain the high-
toughness UVvarnish. The high-toughness UV
varnish of the application can be used as an electronic material
mobile phone or computer flat paint, a paint film is improved by
aerogel and gel modification, and thetoughness strength of a
coating layer is effectively improved.