The invention relates to a water-based UV (
ultraviolet) resin for UV-Monocoat and a preparation method of the water-based UV resin. The water-based UV resin is
sulfonate anionic
polyurethane modified
acrylate and contains eight active functional groups. The water-based UV resin disclosed by the invention can be made into water-based UV-Monocoat with
aluminum paste, transparent color paste, a delustering agent, a
photoinitiator, an auxiliary agent and water. A paint film has excellent
adhesive force,
wear resistance,
alcohol resistance, boiling resistance, flexibility, scratch resistance, hand
perspiration resistance, high temperature and
high humidity resistance,
pollution resistance,
aging resistance, adhesion resistance and
skin feeling, the
metal feeling of the paint film is strong, the recoatability is not influenced, and the paint film is safe and environment-friendly. The water-based UV resin can be used for primary
coating on the surfaces of plastic substrates such as ABS (
acrylonitrile butadiene
styrene), PC (
polycarbonate), PET (
polyethylene terephthalate), ABS+PC, ABS+
glass fiber, PC+
glass fiber and the like of pen televisions, mobile phones, mice, keys, household appliances, switches, packaging materials, automotive upholstery and the like, and can also be used for
surface coating on primer or
powder primer of various
metal alloy substrates.