Vibration damper composition

摘要

The present invention has for its object to provide a damping material which, despite a high damping capacity at and around room temperature, has a small temperature dependence of rigidity at and around room temperature and a damping material having hot-melt processability and a good balance between damping capacity and temperature dependence of rigidity at and around room temperature. This invention provides a damper material composition wherein the ratio of the storage modulus (G') value at 0° C. to the corresponding value at 40° C. as found by the measurement of dynamic viscoelasticity in the shear mode, namely (G'0° C./G'40° C.), is not greater than 15 and the loss tangent (tan delta) value as found by said measurement is not smaller than 0.4 at 0° C. to 40° C.