| abstract |
The present invention addresses the problem of providing an adhesive agent composition which can form an adhesive sheet which has conformability to uneven surfaces, durability, and handling properties. The present invention pertains to an adhesive agent composition comprising: 100 parts by mass of a (meth)acrylic copolymer having a glass transition temperature (Tg) of -50°C or higher and a weight-average molecular weight of 300,000-450,000; 0.1-10 parts by mass of a polyfunctional monomer; and 0.1-10 parts by mass of a photopolymerization initiator which initiates a polymerization reaction of the polyfunctional monomer by irradiation with an active energy ray, wherein the contained amount of a thermal crosslinking agent is less than 0.5 parts by mass with respect to 100 parts by mass of the (meth)acrylic copolymer, and the gel fraction of the adhesive agent composition is 15.0% or less. |