| abstract |
A tough adhesive composition having appropriate adhesive strength and tensile strength is provided. A pressure-sensitive adhesive composition is obtained by photopolymerizing a urethane prepolymer having a plurality of at least one of allyl ether groups and vinyl ether groups, a monothiol having one thiol group, and a polythiol having a plurality of thiol groups. Get. By subjecting the urethane prepolymer to photopolymerization reaction of not only polythiol but also monothiol, it is possible to obtain an adhesive composition having an appropriate adhesive strength. Moreover, it becomes possible by using the said urethane prepolymer to obtain a tough adhesive composition with high tensile strength. Furthermore, since a pressure-sensitive adhesive composition can be produced by a photopolymerization reaction, a process for applying heat or the like is not necessary, and a solvent or the like is not necessary. As a result, the capital investment is reduced and the space is saved, and it is very advantageous for the harmfulness to the human body and environmental pollution. [Selection figure] None |