COMPOUNDING AGENT FOR STUDLESS TIRE AND RUBBER COMPOSITION CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To improve performances on ice of studless tire while maintaining processability by compounding a rubber composition for studless tire with a hollow polymer. SOLUTION: This master batch for studless tire is obtained by compounding 100 pts.wt. of a natural rubber and/or a polyisoprene rubber with 1-30 pts.wt. of an unexpanded acrylonitrile-based hollow polymer and 10-50 pts.wt. of carbon black and kneading the mixture at the expansion starting temperature of the hollow polymer or above. This rubber composition for studless tire comprises the master batch.