The invention provides a UV-curing
adhesive with low Tg point and high permeability and a preparation method thereof. The UV-curing
adhesive is prepared from the following raw materials in parts by weight: 10-30 parts of a self-prepared
urethane acrylate prepolymer with low Tg point, 30-60 parts of aliphatic
polyurethane acrylate with low Tg point, 20-50 parts of a
reactive diluent with low Tg point, 0.5-5 parts of a leveling
wetting agent, 2-4 parts of a
photoinitiator and 1-3 parts of a
silane coupling agent; the self-prepared
urethane acrylate prepolymer comprises long-chain glycol, diisocyanate, a catalyst, a
polymerization inhibitor, an antioxygen and hydroxyl
acrylate resin; the
molar ratio of long-chain glycol, diisocyanate and acroleic hydroxyl ester is 1:(1.82.0):(1.8-2.0); the catalyst, the
polymerization inhibitor and the antioxygen respectively account for 0.01-0.1wt% of the
urethane acrylate prepolymer with low Tg point. Compared with the prior art, the UV-curing
adhesive has the
vitrification temperature less than or equal to 50 DEG C, and has the performances of low
surface tension is low, good wettability, good surface
dryness, excellent tenacity, excellent dampness and
humidity resistance, high
temperature resistance and the like.