Vibration damping material composition

摘要

It is an object of the present invention to provide a vibration damping composition having a high loss tangent (tan delta) and loss factor (eta), and serviceable over a wide temperature range. Provided is a vibration damping composition whose matrix material of organic polymer contains a vibration damping agent, and inorganic and/or organic filler, wherein the vibration damping agent is a phenol-based compound of limited steric hindrance which has a chemical composition free of a branched hydrocarbon group of 4 or more carbon atoms at each site adjacent to the hydroxyl group.