Tire rubber composition and pneumatic tire
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United States of America Patent
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Jun 12, 2018
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app pub date -
Jun 12, 2014
filing date -
Jul 5, 2013
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Abstract
Provided are a rubber composition for tires preventing discoloration and improving ozone resistance while maintaining or improving good elongation at break and good fuel economy, and a pneumatic tire using the rubber composition. Included is a rubber composition for tires including: a rubber component including at least one selected from the group consisting of a specific non-oil extended polybutadiene rubber and a specific oil extended polybutadiene rubber; a phenylenediamine antioxidant; a specific nonionic surfactant; and carbon black and/or silica, the rubber composition having an amount of diene rubber of 70-100% by mass per 100% by mass of the rubber component, the rubber composition having an amount of the phenylenediamine antioxidant of 1.0-8.0 parts by mass, an amount of the nonionic surfactant of 0.1-5.0 parts by mass, and a combined amount of carbon black and silica of 20-45 parts by mass, each per 100 parts by mass of the rubber component.
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