| 摘要 |
PURPOSE: An optical adhesive film is provided to improve elongation and tensile strength, by comprising urethane (meth)acrylate copolymer having a hydroxy group and a vinyl group in terminal thereof, thereby capable being used as an optical adhesive film for display of medium to large sizes. CONSTITUTION: An optical adhesive film is formed by an adhesive composition comprising urethane (meth)acrylate copolymer, a reactive monomer, and an initiator, the elongation is 200-800%, the tensile strength is 10 gf/mm^2 or less. The urethane (meth)acrylate copolymer contains a hydroxy group, and a vinyl group. The urethane (meth)acrylate copolymer is polymerized of a urethane polyol, and a monomer having an isocyanate group and a vinyl group. The urethane polyol comprises a hydroxy group. |
