Abstract: An object of the present invention is to provide an active energy beam-curable adhesive composition that has excellent adhesive power under any conditions of high temperature or high humidity, gives little coloration even when used for a long period of time, and gives no deposition of constituents in cold districts. An active energy beam-curable adhesive composition that contains (A) a urethane (meth)acrylate having a polyester skeleton or a polycarbonate skeleton, (B) a phenol compound having one or more —C(CH3)2R groups (R denotes an alkyl group or a phenyl group) in a phenyl group, (C) a phosphite ester compound (provided that it is one having solubility in the composition), and (D) an ethylenically unsaturated group-containing compound other than component (A) above.

Abstract: The present invention relates to an active energy beam-curable adhesive composition having excellent adhesive power under high temperature and high humidity conditions and causing little coloration even when used for a long period of time. The active energy beam-curable adhesive composition of the present invention comprises (A) 5 to 50 weight % of a urethane (meth)acrylate having a polyester or polycarbonate skeleton, (B) 5 to 95 weight % of a compound having one (meth)acryloyl group represented by formula (1) below or/and formula (2) below, and as necessary (C) 0 to 85 weight % of an ethylenically unsaturated group-containing compound, 5 to 30 weight % of methacrylate compound being contained in the total amount of components (A) to (C). In formulae (1) and (2), R1 and R3 denote a hydrogen atom or a methyl group, R2 and R4 denote a halogen atom or a hydrocarbon group that has 10 or less carbons and does not have a hydrogen atom on the ?-position carbon atom, and m and n denote an integer of 1 to 5.