To provide a rubber composition for tire tread capable of improving the rolling resistance, heat deterioration resistance and suppression to heat generation of tire, while maintaining its abrasion resistance and processability.
The rubber composition contains (A) sulfur, (B) 1,6-bis(N,N-dibenzyl thiocarbamoyl dithio)hexane, (C) at least one vulcanization promoter selected from sulfenamide-based vulcanization promoters and (D) at least one vulcanization promoter selected from thiuram-based vulcanization promoters. In this rubber composition, the compounding amounts of the components (A) to (D) are 0.1-2 pts.wt., based on 100 pts.wt. of a diene rubber component, respectively, preferably meeting all of the following relationships (1) to (5): (1) (A)≥(B), (2) (C)≥(D), (3) 1.0≤(A)+(B)≤2.0, (4) 1.0≤(C)+(D)≤2.0, and (5) 0.5≤[(A)+(B)]/[(C)+(D)]≤1.5.
COPYRIGHT: (C)2009,JPO&INPIT
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Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita