| 摘要 |
<p>PURPOSE: A photocurable adhesive composition is provided to have excellent outdoor visibility, to minimize substrate corrosion by having 4 or more of pH, to minimize shrinkage at curing, and to have excellent elongation, light transmittancy, and adhesion. CONSTITUTION: A photocurable adhesive composition comprises 35-75 wt% of a urethane (meth)acrylate resin 5-30 wt% of a hydroxy group-containing polybutadiene, 15-40 wt% of a photocurable monomer, and 1-5 wt% of a photoinitiator. The pH of the photocurable composition is 4 or more, curing shrinkage ratio of 3% or less, elongation due to ASTM D638 is 200-800%, and modulus is 10-50 kPa. The mixing ratio of the urethane (meth)acrylate resin and the hydroxy group-containing polybutadiene is 70:30-95:5.</p> |
