▎ 摘　　要

NOVELTY - A red sandstone anti-weather anti-corrosion protective nano coating comprises component (A) and component (B) in a mass ratio of 4:1-5:1. The component (A) comprises 60-90 parts mass aqueous acrylic resin, 10-15 parts mass deionized water, 3-9 parts mass film-forming additive, 1-3 parts mass nanoparticles, 0.05-0.2 part mass defoamer and 0.2-0.6 part mass dispersant. The component (B) comprises 70-90 parts mass hexamethylene diisocyanate trimer and 10-30 parts mass propylene glycol monomethyl ether acetate. USE - Anti-weather anti-corrosion protective nano coating used for red sandstone used in hydraulic engineering application (claimed). ADVANTAGE - The nano silicon oxide, nano zirconium oxide and nano graphene oxide are dispersed in the acrylic resin matrix in a flaky and layered manner, so that the compactness of the coating is improved, the invasion of small molecules such as water, carbon dioxide and microorganisms is effectively prevented, and the weather resistance and corrosion resistance of the red sandstone are improved. The coating has aqueous environmental protection, no influence in the surrounding water environment, high bonding strength with the red sandstone, and excellent weathering prevention and corrosion prevention effects. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: preparation of red sandstone anti-weather anti-corrosion protective nano coating, which involves adding deionized water, dispersant and nanoparticles into high-speed dispersion machine, dispersing the mixture for 20-40 minutes under rotation speed of 4000-6000 rpm, the mixture is removed, performing ultrasonic cavitation for 5-15 minutes, adding aqueous acrylic resin, film-forming additive and defoamer, high-speed dispersing for 30 minutes to obtain component (A), adding component (B), namely hexamethylene diisocyanate trimer and propylene glycol monomethyl ether acetate into dispersion machine, and dispersing at 1000-3000 rpm for 5-15 minutes; and application of anti-weather anti-corrosion protective nano coating for red sandstone used in hydraulic engineering.