| abstract |
PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive layer pressure-sensitive adhesive sheet having a high level of reliability, excellent in step followability and blister resistance, excellent in adhesive physical properties (adhesive strength) and wet heat resistance. SOLUTION: A pressure-sensitive adhesive containing a hydroxyl group-containing acrylic resin (A), an ethylenically unsaturated compound (B) having one ethylenically unsaturated group, a crosslinking agent (C), and a photopolymerization initiator (D). It is a composition, and the photopolymerization initiator (D) contains an intramolecular hydrogen abstraction type photopolymerization initiator (D1) having a structural site represented by the following formula (1) and a hydroxyl group in the molecule. A pressure-sensitive adhesive composition. [Chemical 1] [Wherein, R is any one atom or group selected from the group consisting of a halogen atom, a hydroxyl group, an alkoxy group, an alkyl group, and a phenyl group, and n is an integer of 0 to 5. However, when n is 2 or more, each R may be the same or different. ] [Selection figure] None |