| 摘要 |
A rubber composition for a tire tread comprising: per 100 parts by weight of a diene based rubber component containing at least 50 parts by weight of SBR, 5 to 50 parts by weight of carbon black (C/B) having a nitrogen absorption surface area (N2SA) of from 90 to 180 m<2>/g and a DBP absorption amount of from 100 to 170 ml/100 g and 5 to 50 parts by weight of silica (S), wherein the total amount of (C/B+S) is from 30 to 90 parts by weight; and 5 to 20 % by weight of a silane coupling agent relative to the blended amount of silica; 1 to 15 parts by weight of a thermoplastic (novolac type) phenol resin; and 5 to 20 % by weight of hexamethylenetetramine relative to the blended amount of resin, wherein tan delta at 60 DEG C, tan delta at 0 DEG C, dynamic modulus E' at 30 DEG C, and tensile stress at the time of extending 300% (M300) at 25 DEG C of the rubber composition are tan delta (60 DEG C) ≤ 0.14, tan delta (0 DEG C) ≥ 0.50, E'(30 DEG C) ≥ 1.2 x 10<7>pa and M300 (25 DEG C) ≤ 9.5 Mpa, respectively, and a pneumatic tire using the rubber composition. |
