Patent ID: 8883896

Claim:
An adhesive composition, comprising: an isocyanate compound; and an acrylic triblock copolymer (I) represented by formula (1): A1-B-A2 (1), where A1 and A2 each independently represent an alkyl methacrylate polymer block that does not have a functional group that reacts with the isocyanate compound and has a glass transition temperature of 100° C. or more, and B represents an alkyl acrylate polymer block that does not have a functional group that reacts with the isocyanate compound and has a glass transition temperature of −20° C. or less, wherein: the acrylic triblock copolymer (I) has a content of the polymer block B of from 40 to 95 mass %, a weight average molecular weight Mw of from 50,000 to 300,000, and a molecular weight distribution Mw/Mn of from 1.0 to 1.5; the adhesive composition has a content of the acrylic triblock copolymer (I) of 60 mass % or more based on a mass of solids in the adhesive composition; the adhesive composition has a content of isocyanate groups of from 0.0015 mass % or more to less than 0.35 mass %, based on the mass of solids in the adhesive composition, said isocyanate groups being comprised in the isocyanate compound; and the adhesive composition is suitable for an optical film.