To provide a pressure-sensitive adhesive sheet that can maintain high initial adhesive force and adhesion reliability (particularly, repelling resistance) upon bonding and can easily be peeled off and can separate and dismantle a joined part upon peeling from an adherend.
The invention relates to a pressure-sensitive adhesive sheet comprising a viscoelastic layer containing bubbles and/or fine particles; and a pressure-sensitive adhesive layer formed on at least one side of the viscoelastic layer and formed from a pressure-sensitive adhesive composition comprising a monomer mixture comprising the following (a1), (a2) and (a3) or partially polymerized product thereof, and thermal-expandable fine particles: (a1) alkyl(meth)acrylate monomer having 4 to 12 carbon atoms in its alkyl moiety and having a glass transition temperature when formed into a homopolymer of lower than 0°C; (a2) monomer having at least one nitrogen atom and one ethylenically unsaturated bond in its molecule; and (a3) monomer having one ethylenically unsaturated bond in its molecule and having a glass transition temperature when formed into a homopolymer of 0°C or higher (excluding (a2) above).
WO/2011/071477 | A PRESSURE SENSITIVE ADHESIVE AND A PRESSURE SENSITIVE ADHESIVE TAPE |
WO/2013/154137 | ADHESIVE TAPE |
JP6687160 | Adhesive sheets and electronic devices |
NAKAJIMA ATSUSHI
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