Adhesive composition, adhesive sheet, and touch panel

An adhesive composition comprising a base resin and a polyfunctional crosslinking agent;

• wherein the base resin comprises an acrylic resin comprising a polymer of a monomer mixture including a (meth)acrylic acid ester monomer 80-90 parts by weight and a crosslinking monomer 10-20 parts by weight, said acrylic resin having a weight average molecular weight of more than 1,000,000;
• wherein the adhesive composition is cured and has a dynamic shear (X1) strength according to Equation 1:
• X1≧6 kg/cm2, [Equation 1]
• wherein the dynamic shear strength of the adhesive composition is measured at 140° C. and a crosshead speed of 0.8 mm/sec using a sample prepared by attaching one side of the adhesive to one surface of an indium tin oxide polyethylene terephthalate film opposite an indium tin oxide surface of the polyethylene terephthalate film and the other side thereof to a glass substrate, followed by storage at room temperature for 24 hours, wherein the (meth)acrylic acid ester monomer comprises 25 to 100 percent by weight of methyl acrylate;
• wherein the polymer is polymerized by introducing initiators in multiple steps;
• and wherein the crosslinking monomer comprises a hydroxyl group containing monomer, a carboxylic group containing monomer, or a nitrogen containing monomer.