Rubber composition for tire tread and tire manufactured by using the same

摘要

The rubber composition for tire tread and a tire includes 100 parts by weight of a raw material rubber that includes 20 parts by 80 parts by weight of a first solution polymerized styrene-butadiene rubber (SBR1) having a styrene content of 15% to 25% by weight and a vinyl content in the butadiene of 60% to 65% by weight and produced by a batch method; and 60 parts to 90 parts by weight of a silica having a specific surface area measured by nitrogen adsorption of 155 m2/g to 185 m2/g and a CTAB value of 150 m2/g to 170 m2/g.

主权项

1. A rubber composition for tire tread, comprising:
100 parts by weight of a raw material rubber that includes 40 parts to 80 parts by weight of a first solution polymerized styrene-butadiene rubber (SBR1) having a styrene content of 15% to 25% by weight and a vinyl content in the butadiene of 60% to 65% by weight and produced by a batch method; 10 parts to 20 parts by weight of a second solution polymerized styrene-butadiene rubber (SBR2) having a styrene content of more than 30% by weight and less than or equal to 40% by weight and a vinyl content in the butadiene of more than or equal to 20% by weight and less than 30% by weight and produced by a continuous method, 10 parts to 60 parts by weight of butadiene rubber; and 60 parts to 90 parts by weight of a silica having a specific surface area measured by nitrogen adsorption of 155 m2/g to 185 m2/g and a CTAB value of 150 m2/g to 170 m2/g, wherein the first solution polymerized styrene-butadiene rubber includes molecules coupled by silicon (Si) and has the chain ends modified with hydrophilic groups.