Otsuka Chemical Co., Ltd.

Hidehiro Minashima

Takashi Sato

Masaki Abe

Mifuyu Ueno

Noriaki Shiina

Aya Saiki

Kazuhiro Kodama

Shinya Nakashima

Yuzaburo Yano

Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), Rand Reach represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, Arepresents an alkylene group having a carbon number of 1-7, Arepresents an alkylene group having a carbon number of 1-8, Xrepresents an oxygen atom, a sulfur atom, or an &#x2014;NR&#x2014; group, and Xrepresents an oxygen atom, a sulfur atom, or an &#x2014;NR&#x2014; group, where Rand Reach represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4. 

Rubber composition, tire, bisanilino compound, and anti-aging agent

Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), Rand Reach represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group. 

Rubber composition, tire, amine compound, and anti-aging agent

Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R, R, R, and Reach represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but Rand Rdo not both simultaneously represent a hydrogen atom and Rand Rdo not both simultaneously represent a hydrogen atom, Rand Reach represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1. 

Rubber composition, tire, bisphenyldiamine compound, and anti-aging agent

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Kodaira, Japan

Hidehiro Minashima