Water-based Low VOC high-metal texture two-component polyurethane low-temperature curing coating and preparation method thereof

The invention discloses a water-based Low VOC high-metal texture two-component polyurethane low-temperature curing coating and a preparation method thereof. The coating comprises a main agent A and a curing agent B, the main agent A comprises the following components: 25 to 40 parts of waterborne polyurethane (PU) and acrylic dispersion resin, 0.1 to 0.3 part of a pH regulator, 2 to 5 parts of a waterborne coalescing agent, 0.3 to 1 part of a waterborne wetting agent, 0.2 to 1.0 part of a waterborne flatting agent, 20 to 40 parts of a self-made waterborne silver bar additive, 4 to 12 parts of self-made silver soaking water, 4 to 6 parts of waterborne aluminum silver paste, 0 to 6 parts of pearl powder, 0 to 10 parts of waterborne color paste, 0 to 5 parts of a functional additive, 1 to 5 parts of a thickening thixotropic agent, and 6.5 to 15 parts of deionized water; and the curing agent B comprises the following components in parts by weight: 70-80 parts of a water-based isocyanate curing agent and 20-30 par