Patent ID: 8759439
Filing Date: 2014-06-24
Classification: B60C,C08C,C08K,C08L,Y02T,Y10S

Abstract:
1. A tire tread rubber composition comprising: a filler in an amount of 100 to 140 parts by weight based on 100 parts by weight of diene rubber, wherein the filler contains 70% by weight or more of silica, and the diene rubber contains 80% or more of (1) emulsion-polymerized styrene butadiene rubber (E-SBR), (2) terminal-modified solution-polymerized styrene butadiene rubber (modified S-SBR), and (3) natural rubber (NR), the diene rubber contains 10 to 25% by weight of the natural rubber, a weight ratio of E-SBR:modified S-SBR:NR is 1 to 2:2.5 to 4:1, the styrene content of each of the E-SBR and the modified S-SBR is 35 to 40% by weight, and a difference between the glass transition temperature of the E-SBR and that of the modified S-SBR is less than 10° C.