RUBBER COMPOSITION AND VIBRATION DAMPER USING THE RUBBER COMPOSITION

摘要

A torsional vibration damper or other vibration damping device with a rubber vibration absorbing element. The rubber element is a peroxide- cured composition based on 100 parts of ethylene-alpha-olefin elastomer, and 5 to 100 parts of polyvinyl butyral polymer which may have a molecular weight from about 40,000 to about 250,000. The composition may also include a compatibilizer or homogenizer, such as chlorinated polyethylene. The polyvinyl butyral increases the damping of the composition, and the compatibilizer improves the temperature stability of the damping.