| abstract |
An object of the present invention is to provide a display device which can be used for bonding a display member to a front surface optical member and which is capable of being used in a wide temperature environment, A pressure-sensitive adhesive sheet capable of suppressing occurrence of stress and suppressing display unevenness and a material thereof are provided. (A) a urethane (meth) acrylate oligomer having a polyoxyalkylene structure, (B) a (meth) acrylic polymer, (C) a (meth) acrylic monomer, and (A1) a monomer component comprising a polyoxyalkylene polyol, (a2) a polyisocyanate, and (a3) a hydroxyl group-containing mono (meth) acrylate compound, and the total mass (A) an oligomer which is substantially free of unreacted isocyanate group and has a relation N (= n1 / n2) of not less than 4000 with n1 and a total equivalent weight n2 of acryloyl groups in the total monomer components, . |