| 摘要 |
<p>The present invention provides a rubber composition for a base tread improving steering stability and rolling resistance properties and a tire comprising the same. The present invention relates to a rubber composition for a base tread comprising a rubber component containing (a) 20 to 60 % by weight of a polybutadiene rubber containing 2.5 to 20 % by weight of a 1,2-syndiotactic polybutadiene crystal, (b) 5 to 80 % by weight of a tin-modified polybutadiene rubber polymerized by a lithium initiator, wherein the amount of a tin atom is 50 to 3000 ppm, the amount of a vinyl bond is 5 to 50 % by weight and molecular weight distribution (Mw/Mn) is at most 2, and (c) 10 to 75 % by weight of a rubber other than (a) and (b), and a tire having a base tread comprising the same.</p> |
