| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of sufficiently keeping adhesive power even gone through a heat treatment at around 150-250°C without no great change in the adhesive power, having excellent water resistance, and reducing the adhesive power by ultraviolet irradiation.SOLUTION: This pressure-sensitive adhesive composition includes: a (meth)acrylic ester polymer (A) containing repeating units derived from styrene; a monomer (B) having three or more in total of polymerizable carbon-carbon double bonds and/or polymerizable carbon-carbon triple bonds; an oligomer (C) having two or more in total of polymerizable carbon-carbon double bonds and/or polymerizable carbon-carbon triple bonds; and a photopolymerization initiator (D). The pressure-sensitive adhesive composition includes 40-70 pts.mass of the polymer (A), 1-59 pts.mass of the monomer (B), and 1-59 pts.mass of the oligomer (C), provided (A)+(B)+(C)=100 pts.mass. Adhesive power of the pressure-sensitive adhesive composition can be lowered by ultraviolet irradiation. |
