| 摘要 |
Provided is a rubber composition for a tire, comprising: diene rubber contained in a quantity of 100 parts by mass; silica contained in a quantity of 60 to 200 parts by mass; polysiloxanes represented by the average composition formula of Formula (1): (A) a (B) b (C) c (D) d (R 1 ) e SiO (4-2a-b-c-d-e)/2 (1) [in the formula, A represents a divalent organic group containing a sulfide group, B represents a monovalent hydrocarbon group having from 5 to 10 carbon atoms, C represents a hydrolyzable group, D represents an organic group containing mercapto group, R 1 represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms, and a-e satisfy the relational expressions 0 ‰¤ a < 1, 0 ‰¤ b < 1, 0 < c < 3, 0 < d < 1, 0 ‰¤ e < 2, and 0 < 2a + b + c + d + e < 4; however, either a or b is not 0] contained in a quantity from 1 to 20 mass% relative to the quantity of silica; and a thiuram disulfide vulcanization accelerator contained in a quantity from 0.05 to 3.0 parts by mass; and a pneumatic tire having tire treads formed using the rubber composition for a tire. |
