Patent ID: 8507582
Filing Date: 2013-08-13
Classification: B60C,C08K,C08L

Abstract:
1. A rubber composition for use as a tire tread comprising: a tackifying resin having a softening point of from 100° C. to 150° C. in an amount of from 10 to 50 parts by weight, the tackifying resin including at least one of a terpene phenol resin, a terpene styrene resin, and a polymerized rosin resin; a carbon black having a nitrogen specific surface area of from 250 to 400 m sulfur (S) in an amount of from 1 to 3 parts by weight; a sulfenamide vulcanization accelerator (A) in an amount of from 0.5 to 4.0 parts by weight of; a rubber component comprising from 10 to 30 weight % of a natural rubber and from 75 to 85 weight % of a styrene butadiene rubber having a glass transition temperature of from −35° C. to 0° C.; a thiuram vulcanization accelerator (T) in an amount of from 1.5 to 5.0 parts by weight; other fillers, a sum of which, when combined with the carbon black, is from 80 to 130 parts by weight; per 100 parts by weight of the rubber component; wherein, when compounded, (A+T)/S is a weight ratio of from 2≦(A+T)/S< to 4.