Patent ID: 8399091

Claim:
A pressure-sensitive adhesive sheet in combination with an electronic device, wherein the pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer formed from an aqueous dispersion pressure-sensitive adhesive composition, the pressure-sensitive adhesive composition contains an aqueous dispersion acrylic polymer synthesized using a chain transfer agent not having sulfur as a component thereof, the pressure-sensitive adhesive sheet is bonded in an internal space of the electronic device where a metal material is present, and the pressure-sensitive adhesive sheet does not directly contact the metal material, and the pressure-sensitive adhesive sheet satisfies all of the following properties: (A) 180° peel strength on an acrylonitrile-butadiene-styrene copolymer resin sheet is 10 N/20 mm or more; (B) holding time in an 80° C. cohesive strength test is 1 hour or more; (C) an amount of gas containing sulfur, as a component, released in a gas generation test wherein the pressure-sensitive adhesive sheet is heated at 85° C. for 1 hour is 0.043 μg or less as SO 4 2− per square centimeter (cm 2 ) of the pressure-sensitive adhesive sheet surface area; (D) in a metal corrosion test in which 1 g of the pressure-sensitive adhesive sheet and a silver plate are placed in a vessel having a volume of 50 mL so that the sheet and the plate mutually do not make contact, and in which the vessel is then sealed and stored for 1 week at 85° C., no corrosion of the silver plate occurs.