Sumitomo Chemical Company, Limited

Kazumasa Matsuo

Orhan Ozturk

Takeshi Hara

Yasuo Uekita

Natsuyo Kamimoto

Natsuko Kimura

Tatsuhiko Adachi

Toshihiro Nobuoka

The present invention provides a rubber composition obtained by kneading a rubber component, a vulcanization accelerator, silica, and a compound represented by the following formula (I): wherein the groups are as defined in the DESCRIPTION.

Rubber composition

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

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Osaka, Japan

Kazumasa Matsuo