The invention discloses a UV-cured self-repairing type
polyurethane acrylate coating and a preparation method thereof. The
polyurethane resin coating is prepared from, by
mass, 20 to 35 parts of diisocyanate, 40 to 55 parts of
polymer polyol, 3 to 5 parts of a micromolecular
diol chain
extender, 5 to 12 parts of a functional end-capping
reagent composition, 0.03 to 0.05 part of a
polymerization inhibitor, 0.05 to 1 part of a catalyst, 0.5 to 3 parts of a
photoinitiator, 0.5 to 2 parts of other auxiliaries, 10 to 20 parts of a diluting
monomer and 60 to 100 parts of a
solvent. The UV-cured
polyurethane acrylate is flexible in structural design, the functional end-capping
reagent adopts a composition containing three groups, namely furfuryl,
maleimide and
acrylate, and the furfuryl and the
maleimide can form a dynamically reversible Diels-
Alder covalent bond, therefore, the UV light-cured polyurethane acrylate
coating prepared by the preparation method disclosed by the invention not only has higher glossiness and transparency, but also has better tensile strength,
hardness and
wear resistance, and also has good self-repairing performance.