Sumitomo Chemical Company, Limited

Orhan Ozturk

Yasuo Uekita

Yosuke Watanabe

Kazumasa Matsuo

Natsuko Kimura

Kenichi Takeuchi

Shuhei Matsumoto

A rubber composition comprising a compound having one or more groups represented by formula (X) and a rubber component is provided. wherein ring Wrepresents a cyclic group having at least one selected from the group consisting of &#x2014;C(&#x2550;O)&#x2014; and &#x2014;C(&#x2550;S)&#x2014;; Nrepresents a nitrogen atom; the at least one selected from the group consisting of &#x2014;C(&#x2550;O)&#x2014; and &#x2014;C(&#x2550;S)&#x2014; in the ring Wand Nare conjugated; and Zrepresents &#x2014;O&#x2014; or &#x2014;S&#x2014;.

Rubber composition and vulcanization aid

The present invention relates to a novel phosphite compound represented by the formula (I): wherein R, R, Rand Reach independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, a process for producing the same, and uses thereof as a stabilizer for an organic material.

Phosphite compound, method for producing the same and uses thereof

A rubber composition comprising a hydrate of a compound represented by formula (I-2) or a salt thereof; or a methanol solvate of a compound represented by formula (I) or a salt thereof. 

Rubber composition comprising a hydrate of a compound or a methanol solvate of a compound

A rubber composition obtained by kneading at least one selected from the group consisting of (A1), (B1), (C1) and (D1), a rubber component and a filler, and a method of improving the viscoelastic property of vulcanized rubber, comprising a first step of kneading at least one selected from the group consisting of (A1), (B1), (C1) and (D1), a rubber component, a filler and a sulfur component and a second step of thermally treating the kneaded material obtained in the previous step. 

Rubber composition

An aminoalkylthiosulfuric acid compound represented by formula (1): is produced. In step (A1), a hydrochloride of a chloroalkylamine compound represented by formula (2): is reacted with an alkali metal salt of thiosulfuric acid in the presence of 2 to 6 parts by weight of water with respect to 1 part by weight of the hydrochloride between 50&#xb0; C. and 100&#xb0; C. Rand Reach represents a hydrogen atom and the like, and n represents an integer of 2 to 9. In step (B1), a mixture of a solid containing the aminoalkylthiosulfuric acid compound and a liquid containing an alkali metal chloride is obtained by adjusting the temperature of the mixture of step (A1) to between &#x2212;15&#xb0; C. and 50&#xb0; C. In step (C1), the aminoalkylthiosulfuric acid compound is obtained as solid by separating the solid containing the aminoalkylthiosulfuric acid compound and the liquid containing the alkali metal chloride from the mixture of (B1).

Process for producing aminoalkylthiosulfuric acid compound

Use of S-(3-aminopropyl)thiosulfuric acid and/or a metal salt thereof for improving the viscoelastic properties of a vulcanized rubber.

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Tokyo, Japan

Orhan Ozturk