| abstract |
Provided is a rubber composition for tire tread containing: a diene rubber; silica in the amount of 60-200 parts by weight with respect to 100 parts by mass of the rubber; a polysiloxane represented by Formula: (A) a (B) b (C) c (D) d (R 1 ) e SiO (4-2a-b-c-d-e) / 2 (the formula is an averaged compositional formula in which 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, R 1 represents a C1-4 monovalent hydrocarbon group, and a-e satisfy the relational formulae 0≤a<1, 0≤b<1, 0<c<3, 0<d<1, 0≤e<2, and 0<2a+b+c+d+e<4, with the caveat that either a or b is not 0.); and an alkyl triethoxysilane containing a C7-20 alkyl group. Also provided is a pneumatic tire using this rubber composition in the tire tread. |