Patent ID: 9624361
Date: 2017-04-18
CPC Classifications: B60C,C08K,C08L,Y02T

Claim:
1. A rubber composition for tire tread, comprising: 100 parts by weight of raw material rubber; 10 parts to 100 parts by weight of a reinforcing filler; 1 part to 10 parts by weight of zinc oxide; 1 part to 10 parts by weight of stearic acid; and 1 part to 20 parts by weight of a silane compound represented by the following formula (1), wherein the raw material rubber comprises 40 parts to 90 parts by weight of a styrene-butadiene rubber, and 10 parts to 60 parts by weight of a butadiene rubber, and wherein the styrene-butadiene rubber has a styrene content of 22% to 25% by weight, a vinyl content of 15% to 18% by weight, a number average molecular weight (Mn) of 55,000 to 59,000, a weight average molecular weight (Mw) of 260,000 to 320,000, and a molecular weight distribution (MWD) of 3.8 to 4.2: wherein in the formula (1), X represents a vinyl group; Y represents a functional group represented by the following formula (2a); Z represents a functional group represented by the following formula (2b): (wherein d and e each independently represent an integer from 0 to 6); a represents an integer from 0 to 6; b and c each independently represent an integer from 0 to 2 and do not necessarily represent 0 at the same time; and x represents an integer from 1 to 3.