RUBBER COMPOSITION FOR AUTOMOBILE TORSIONAL DAMPER

摘要

A rubber composition for torsional dampers of cars is provided to prevent a rubber member for a damper from being damaged by heat generated from an engine room by realizing improved durability, heat resistance and high damping quality, and by reducing a variation in natural frequencies. A rubber composition for torsional dampers of cars comprises: 100 parts by weight of acrylic rubber represented by the following formula 1; 10-20 parts by weight of carbon black having a particle diameter of 26-30 nm; 20-40 parts by weight of carbon black having a particle diameter of 40-48 nm; 0.5-1 parts by weight of an amine-based crosslinking agent; 2-3 parts by weight of an accelerator; 2-3 parts by weight of an activator; 3-4 parts by weight an anti-aging agent; and 2-3 parts by weight of a vulcanization aid. In formula 1, R is a C1-C20 alkylene group; and each of x, y and z is an integer of 1-150.