To provide a vibration damping viscoelastic material for building, suitable for a vibration damping material constituting a damper for building, etc., to provide the damper for building given by using the vibration damping viscoelastic material, and to provide an isolator for building given by using the same.
This vibration damping viscoelastic material for building contains a low molecular weight polymer having a molecular weight of ≤100,000 in an amount of 25-49 pts.wt. based on 100 pts.wt. of the amount of the polymer components and a polymer containing polynorbornene in an amount of 4-16 pts.wt., and further has the following characteristics (1) to (5): (1) an equivalent damping constant of ≥0.24, when measured at 200% deformation; (2) a dynamic shearing modulus of ≥0.127 MPa, when measured at 200% deformation; (3) a dynamic shearing modulus of ≤6.86 MPa, when measured at 3% deformation; (4) a ratio of a complex modulus of elasticity (E*) measured at -10°C to an E* measured at 20°C of ≤4.0; and (5) a ratio of the dynamic shearing modulus measured at 3% deformation to the dynamic shearing modulus measured at 200% deformation of ≤40.
SHIMADA ATSUSHI
MIYAJI ATSUSHI
