| 摘要 |
PURPOSE: A rubber composition for tire tread is provided to increase a frictional coefficient and to obtain excellent braking performance on an icy or wet road. CONSTITUTION: A rubber composition for tire tread comprises liquid polybutadiene rubber which includes 100.0 parts by weight of raw rubber, 5-10 parts by weight of a shell-crushed material, 1-5 parts by weight of a foaming agent, and 7-12 parts by weight of a siloxane group. The surface of the shell-crushed material is treated by a C15-20 organic material which includes a carboxylic acid group. The vinyl content of the liquid polybutadiene rubber is 5-30wt%. The mooney viscosity is 50-70 and the number average molecular weight is 2,000-3,000g/mol. The foaming agent is toluenesulfonyl hydrazide. |
