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1. (WO2016056443) RUBBER COMPOSITION AND PNEUMATIC TIRE

Pub. No.:    WO/2016/056443    International Application No.:    PCT/JP2015/077737
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Thu Oct 01 01:59:59 CEST 2015
IPC: C08L 21/00
B60C 1/00
B60C 15/06
C08K 3/04
Applicants: SUMITOMO RUBBER INDUSTRIES, LTD.
住友ゴム工業株式会社
Inventors: KITAGO Ryota
北郷 亮太
NAGASE Takayuki
永瀬 隆行
KAWANA Yuuki
川名 佑紀
HATTORI Takayuki
服部 高幸
WADA Takao
和田 孝雄
ISHINO Soh
石野 崇
YAMASHIRO Yuhei
山城 裕平
OSHIMO Masaki
大下 雅樹
NAKAMURA Masanobu
中村 匡伸
Title: RUBBER COMPOSITION AND PNEUMATIC TIRE
Abstract:
The purpose of the present invention is to provide a pneumatic tire with both wear resistance and low heat generation. The present invention is a pneumatic tire with treads comprising a rubber composition that contains an isoprene-based rubber and a high-cis butadiene rubber with a cis content of at least 90% by mass, at least one type of carbon black, and sulfur, wherein the at least one type of carbon black is a carbon black obtained by using, as a raw-material oil for manufacturing the carbon black, a raw-material oil with: a BMCI value of 150 or less, calculated from the formula below using an average boiling point T (°C) and a specific gravity D (60/60°F) when compared to water at 60°F; and an aliphatic hydrocarbon ratio of at least 30% by mass. BMCI = 48640 / (T + 273) + 473.7D − 456.8