| abstract |
The invention relates to the technical field of antifogging agents, and particularly relates to a waterborne polyurethane-silica sol composite antifogging agent as well as a preparation method and application thereof. The invention provides a waterborne polyurethane-silica sol composite antifogging agent, which is prepared from hydrophilic polyurethane containing C ═ C double bonds, silica sol containing C ═ C double bonds and a solvent; the mass ratio of the hydrophilic polyurethane containing C ═ C double bonds, the silica sol containing C ═ C double bonds and the solvent is 5-15: 0.5-5: 95-80; the solid content of the silica sol containing C ═ C double bonds is 20-50%. The waterborne polyurethane-silica sol composite antifogging agent provided by the invention can form a cross-linking structure under the ultraviolet irradiation condition, so that the antifogging aging is effectively prolonged, and the formed coating has high mechanical strength and transparency and is more widely applied. |