Mitsui Chemicals, Inc.

Bridgestone Corporation

Kouki Oogaki

Akinori Nagatomo

Takeshi Kobayashi

Kazuya Tsukamoto

Nobumasa Arashiba

Takashi Yamaguchi

Katsuharu Miyata

Yoshinori Kuriya

Kazunori Kaneda

Jyoji Morisaki

Masaaki Iijima

Hiroaki Matsuno

Nobumasa c/o Mitsui Chemicals Inc Arashiba

Yoshinori Bridgestone Corporation Kuriya

Kazunori Bridgestone Corporation Kaneda

This invention provides a rubber composition comprising 1-10 parts by mass of sulfur and 0.1-10 parts by mass of a compound represented by the following general formula (1) or a composition containing the compound as a main component based on 100 parts by mass of a rubber component as well as a pneumatic tire in which at least one of a carcass () and a belt () includes a layer composed of steel cords covered with a coating rubber, characterized in that the above rubber composition is used as the coating rubber covering the steel cords in at least one of the carcass () and the belt (): (wherein R represents a divalent aliphatic group having a carbon number of 1-16 or a divalent aromatic group).

Rubber composition and pneumatic tire using the same

A method of producing a compound represented by the following general formula (3): [wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group], which comprises a step (i) of reacting a compound represented by the following general formula (1): with a carboxylic acid halide represented by the following general formula (2): [wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group and X is a halogen atom] in the presence of a basic compound to form an ester, and a step (ii) of conducting a heat treatment after the step (i) to decompose an oligomer in the ester.

Method for producing dihydroxybenzene derivative

This invention provides a compound represented by the following general formula (1) and capable of suppressing the blooming, which is observed in the compounding of the resorcin or the RF resin, as far as possible while maintaining the workability and high humidity-aged adhesion of the rubber composition obtained by compounding with rubber, reducing the deterioration of the adhesiveness during the storage of the rubber composition and stably developing the adhesiveness as well as the composition containing the above-mentioned compound as a main component: (wherein R represents a divalent aliphatic group having a carbon number of 1-16).

Compound and composition containing the same

An improved preparation process for an aromatic mononitro compound comprising reacting an aromatic compound with mixed acid consisting of nitric acid, sulfuric acid or phosphoric acid and water, wherein these flow to react with each other in a reactor comprising a tube inside of which more than one twisted tabular members are aligned in sequence in a manner that a front margin of a twisted tabular member is substantially perpendicular to an back margin of the preceding member, can resolve a number of problems such as an inadequate mixing efficiency, reduction of a reaction rate, associated voluminal increase/complication of a reactor and difficulty in securing safety as well as provide the aromatic mononitro compound with minimal amount of by-products in a considerably short period.

Preparation process for aromatic mononitro compounds

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Otake, Japan

Kouki Oogaki