| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for vibration-proof rubber, belt, hose or footwear member obtained by blending polybutadiene having improved processability and abrasion resistance.SOLUTION: The rubber composition for vibration-proof rubber, belt, hose or footwear member contains (i) polybutadiene manufactured by using a cobalt catalyst satisfying (A) Mooney viscosity (ML) of 43 to 70, (B) ratio (Tcp/ML) of 5 wt.% toluene solution viscosity (Tcp) and Mooney viscosity (ML) of 0.9 to 1.7, (C) stress relaxation time (T80) by 80% attenuation of a value when torque at MLmeasurement end is 100% of 10.0 to 40.0 sec., (D) molecular weight distribution (Mw/Mn) is 2.50 to 4.00 and (F) ratio of a cis structure in a micro structure analysis of 94.0 to 98 mol%, (ii) other rubber and (iii) a rubber reinforcement material.SELECTED DRAWING: None |
