| 摘要 |
PROBLEM TO BE SOLVED: To provide a base isolation structure having the stable base isolating characteristic hardly affected by the difference in temperature caused by the change of seasons. SOLUTION: In this base isolation structure formed by a composite laminate obtained by alternately laminating hard plates having rigidity and soft plates having visco-elastic property, the soft plate having the visco-elastic property is formed by a polymer prepared by photopolymerizing a composition including (A) 100 pts.wt. of alkyl (metha) acrylate having 2-20C alkyl group, (B) 3-100 pts.wt. of natural rubber and/or synthetic rubber, (C) 0.01-5 pts.wt. of crosslinking agent or a crosslinkable monomer, and (D) 0.01-5 pts.wt. of photopolymerization starting agent. |
