High-hardness scratch-resistant water-based two-component polyurethane matte black primer-topcoat paint as well as preparation method and application thereof

The invention provides a high-hardness scratch-resistant water-based two-component polyurethane matte black primer-topcoat paint as well as a preparation method and application thereof. The two-component matte black primer-topcoat paint comprises a component A and a component B, wherein the component A comprises a water-based hydroxyl polyurethane acrylic acid dispersion, a water-based hydroxyl acrylic acid dispersion, hydroxyl microspheres, high-pigment carbon black slurry, a water-based additive, a coalescing agent and water; and the component B comprises a curing agent and a diluting solvent. The matt black primer-topcoat paint has the properties of high hardness, scratch resistance, chemical resistance and the like, is very excellent in constructability, activation period, surface effect and the like, is suitable for a water-based two-component primer-topcoat matt black system, and is particularly suitable for the decoration and protection fields of plastic paint industries such as 3C consumer electronics