▎ 摘　　要

NOVELTY - Wear-resistant waterproof coating comprises component alpha and a component gamma in mass ratio of 1: 0.1-0.6. The component alpha comprises diisocyanate compounds, oligomer dihydric alcohol, pigments and fillers. The molar ratio of diisocyanate compound and oligomer dihydric alcohol is 0.8-1.2: 1, and the weight ratio of diisocyanate compounds, pigments and fillers is 10: 1-2: 1-2. The component gamma comprises nano graphene grafted dendritic macromolecule, hydrogenated epoxy resin, polyaspartic acid ester and an auxiliary agent, where mass ratio of the nano graphene grafted dendritic macromolecule, hydrogenated epoxy resin, polyaspartic acid ester and auxiliary agent is 10-20: 1-5: 10-20: 1-2. The nano graphene grafted dendritic macromolecule is prepared by using carboxylated graphene and amino-terminated dendritic macromolecule to carry out condensation reaction, so that graphene is grafted at the end portion of the dendritic macromolecule. USE - Wear-resistant and waterproof paint for manufacturing guide vane of large water turbine. ADVANTAGE - The coating obviously improves impact resistance and the abrasion resistance, has high bonding strength with the guide vane base material, strong interlayer bonding force, good construction performance and higher protection capability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing wear-resistant waterproof coating for manufacturing a large water turbine guide vane, which involves: carrying out sand blasting treatment on the 45# carbon steel of the large-sized water turbine guide vane substrate to obtain a pretreated guide vane substrate; praying the wear-resistant waterproof coating for the guide vane of the water turbine on the surface of the pretreated guide vane substrate, and curing to obtain a primary coated substrate; praying wear-resistant waterproof coating for the guide vane of the water turbine on the surface of the primary coating substrate, and curing for 10-20 days at 20-30℃ and the relative humidity of 50-70% to obtain target product.