The invention discloses
solvent-free
polyurethane floor paint, which is prepared from main paint and a curing agent, wherein the curing agent is a
polyol-modified
isocyanate obtained by adding 20-40 parts of
polyol and 70-80 parts of
isocyanate for carrying out a reaction; the main paint is prepared from 40-60 parts of hydroxyl-terminated resin, 0.1-0.4 part of defoaming agent, 0.1-0.2 part of flatting agent, 0.1-0.4 part of a dispersing agent, 0.1-0.3 part of an anti-
settling agent, 30-40 parts of
pigment filler, and 5-10 parts of a chain
extender; the invention also discloses a preparation method of the
solvent-free
polyurethane floor paint. The polyether
polyol modified
isocyanate is used as the curing agent, so that the low temperature flexibility of a paint film is increased, but thehardness of the paint film is not affected, and the paint can pass a bending test at the low temperature of -30 DEG C; furthermore, by controlling the contents of all the components in the main paint,the gelation time of the paint film can reach 40-70 minutes after the main paint is compounded with the curing agent, so that the construction
operation time is long, and the application range is broadened; furthermore, the waste of raw materials is reduced, and the construction cost is lowered.