Rubber composition for tread, and pneumatic tire

摘要

Provided are a rubber composition for a tread, capable of improving the fuel economy and abrasion resistance in a balanced manner while achieving a good appearance and a good cure rate; and a pneumatic tire containing the rubber composition. The present invention relates to a rubber composition for a tread, including: a solution-polymerized styrene-butadiene rubber, carbon black, silica, and polyethylene glycol, wherein a rubber component of the rubber composition contains 60 mass % or more of the solution-polymerized styrene-butadiene rubber based on 100 mass % of the rubber component, and the rubber composition includes, per 100 parts by mass of the rubber component, 10 parts by mass or less of the carbon black, 50 parts by mass or more of the silica, and 0.1 to 3.5 parts by mass of the polyethylene glycol.

主权项

1. A id="REI-00003" date="20161025" pneumatic tire, comprising a tread formed from a id="REI-00003" rubber composition for a tread, comprising:
a modified solution-polymerized styrene-butadiene rubber, a non-modified solution-polymerized styrene-butadiene rubber, carbon black having a nitrogen adsorption specific surface area of 70 m2/g or more, silica, and polyethylene glycol, the modified solution-polymerized styrene-butadiene rubber being one modified with a compound represented by the following formula (1):wherein, in formula (1), R1, R2, and R3 are the same as or different from one another, and each represents an alkyl, alkoxy, silyloxy, acetal, carboxyl or mercapto groupid="REI-00006" date="20161025" , or a derivative thereofid="REI-00006" ; R4 and R5 are the same as or different from each other, and each represents a hydrogen atom or an alkyl group; and the symbol n represents an integer; and
wherein a rubber component of the rubber composition contains 60 mass % or more of the modified solution-polymerized styrene-butadiene rubber based on 100 mass % of the rubber component, and the rubber composition comprises, per 100 parts by mass of the rubber component, 10 parts by mass or less of the carbon black, 50 parts by mass or more of the silica, and 0.1 to 3.5 parts by mass of the polyethylene glycol.