Rubber composition having a large damping capacity

Abstract

Disclosed is rubber composition which can preferably be used for the components requires high damping capacity such as rubber dampers for use in the structures, public works, vehicles, oversize powered machines, and heavy weight structures; and general purpose dumpers for use in sound products, a variety of meters, the components of the vehicles, and the like in the case of a little amount of use. The rubber composition is characterized by having a complex shear elastic modulus of 1-20 kg/cm.sup.2 and a Tan.delta. of 0.40-1.5 at 30.degree. C. under a frequency of 0.5 Hz.+-.50% comprising: a) 100 parts by weight of polyisobutylene; b) x parts by weight of filler for use in rubber; c) y parts by weight of carbon black having an iodine adsorption of 20-120 mg/g; wherein the value x and y satisfy the relation that: x.ltoreq.450, y.ltoreq.150, and x+y.gtoreq.100.

Dependencies are inferred from the claim text.