| 摘要 |
Provided is a rubber composition for tire tread, comprising: diene rubber; silica having N2SA of 194-225m2/g and CTAB of 180-210m2/g and contained in the quantity of 60-200 parts by mass with respect to 100 parts by mass of rubber (100); and polysiloxane represented by the average composition of formula (1), and contained in the quantity of 1-20 mass% with respect to the quantity of silica. (A) a (B) b (C) c (D) d (R1)eSiO(4-2a-b-c-d-e)/2 (1) [In the formula, A represents a bivalent organic group containing a sulfide group, B represents a C5-10 monovalent hydrocarbon group, C represents a hydrolyzable group, D represents an organic group including a mercapto group, R1 represents a C1-4 monovalent hydrocarbon group, where 0≤a<1, 0≤b<1, 0<c<3, 0< d<1, 0≤e<2, 0<2a+b+c+d+e< 4, and a≠b≠0]. Also provided is a pneumatic tire using said composition in the tire tread. |
