| 摘要 |
<p>PURPOSE: An optical adhesive composition is provided to obtain an adhesive layer with low storage, modulus, low elastic modulus, and high adhesion. CONSTITUTION: An optical adhesive composition comprises a mixture of a urethane (meth)acrylate copolymer with a weight average molecular weight of 30,000-60,000g/mol; and a urethane (meth)acrylate copolymer with a weight average molecular weight of 5,000-30,000g/mol. The viscosity of the optical adhesive composition at 25 deg. C is 2,000-4,000cps. The curing contraction ratio of the composition represented by formula 1: curing contraction ratio= (viscosity of a liquid composition before curing-viscosity of solid after curing)/viscosity of a liquid composition before curing*100, is 1.5% or less.</p> |
