| 摘要 |
<p>PURPOSE: A photocurable adhesive composition is provided to have excellent outdoor visibility, to have excellent elongation, adhesion, impact strength, and light transmittance, thereby minimizing shrinkage phenomena. CONSTITUTION: A photocurable adhesive composition comprises an isoprene-based rubber, xylene-formaldehyde resin, photocurable monomer, and photoinitiator. The pH of the photocurable adhesive composition 4 or more, the adhesion is 20 kgf or more, the shrinkage ratio at curing is 3% or less, and the elongation by ASTM D638 is 400-800%. The weight ratio of the isoprene-based rubber and xylene-formaldehyde resin is 60:40-95:5. The isoprene-based rubber contains a vinyl group in the terminal thereof, the weight average molecular weight of the isoprene-based rubber is 10,000-50,000 g/mol, and the glass transition temperature is (-70)-(-50) deg. C.</p> |
