▎ 摘　　要

NOVELTY - Pressure-sensitive adhesive composition comprises a polymer, an ionic liquid, and a tackifier having a hydroxyl value of 150 mg potassium hydroxide/g or less. USE - The adhesive composition is used for electrical peeling and in pressure-sensitive adhesive sheet and joined body (all claimed). The adhesive sheet is used for mobile terminals such as smartphones, mobile phones, laptop computers, video cameras, and digital cameras, fixing vehicle-mounted members such as batteries and motors, fixing applications such as ceramic capacitors and lithium ion batteries, and in semiconductor manufacturing processes and inspections, for protective applications in metalworking processes such as stainless steel plates for railways, silicon substrates for semiconductor wafers, sapphire substrates for LEDs, silicon carbide substrates and metal base substrates, thin-film transistor substrates for displays, color filter substrates and base substrates for organic electroluminescent panels, passive matrix substrates, surface cover glass for smart phones, and touch panel sensors attached to the cover glass, one glass solution substrates, organic substrates and organic-inorganic hybrid substrates, flexible glass substrates for flexible displays, and graphene sheets. ADVANTAGE - The composition is capable of forming a pressure-sensitive adhesive layer that firmly bonds members when no voltage is applied and whose adhesive strength is sufficiently reduced by the application of voltage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition; and a joined body comprising the adhesive sheet and a conductive material, where the adhesive layer is adhered to the conductive material.