New Japan Chemical Co., Ltd.

Makiko Takii

Yasuyuki Kawahara

Kouji Takahashi

A diester represented by the formula wherein A represents a cyclohexane ring, cyclohexene ring or benzene ring, X is H or methyl group, Rand Rare the same or different and each is C3-C18 branched-chain alkyl group, C1-C18 straight-chain alkyl group, C2-C18 straight-chain alkenyl or C3-C18 cycloalkyl, provided that when A is a benzene ring, Rand Rare different from each other and &#x2014;COORand &#x2014;COORare attached to two adjacent carbon atoms of the benzene ring, and having the following properties:

Dicarboxylic diester, process for producing the same, and refrigerating machine lubricating oil comprising the ester

A diester represented by the formula wherein A represents a cyclohexane ring, cyclohexene ring or benzene ring, X is H or methyl group, Rand Rare the same or different and each is C3-C18 branched-chain alkyl group, C1-C18 straight-chain alkyl group, C2-C18 straight-chain alkenyl or C3-C10 cycloalkyl, provided that when A is a benzene ring, Rand Rare different from each other and &#x2014;COORand &#x2014;COORare attached to two adjacent carbon atoms of the benzene ring, and having the following properties:

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Uji, Japan

Makiko Takii