The invention discloses high-
hardness scratch-resistant double-component waterborne
polyurethane woodwork
varnish and a preparation method thereof. The
varnish consists of double components, i.e., a primer and a curing agent, wherein the primer consists of hydroxyl polyacrylate dispersion resin, dispersant, nano-scale
silicon dioxide glass
powder, a scratch-resistant
wax auxiliary agent, an organic
bismuth /
zinc composite catalyst, an antifoaming agent, a
wetting agent, water and an additive, wherein the sum of the weight percentages of the A components is 100 percent; the curing agent consists of
propylene glycol ethyl
ether acetate and allophanate modified HDI (
Hexamethylene Diisocyanate) tripolymer; the sum of the weight percentages of the B components is 100 percent; and the A components and the B components are mixed according to the equivalent
molar ratio of n-NCO:n-OH as 1.38:1.62. The
varnish has the advantages of high
hardness, shortened surface
drying time and hard
drying time, long activation period, superior performance, environmental friendliness of the product and high
operability.