New Japan Chemical Co., Ltd.

Hirotsugu Mochida

Akinobu Takegami

Shunsuke Ano

Meguru Sugiyama

Yumi Mandai

An object of the present invention is to provide an ester-based lubricating base oil for a fluid bearing that has a high viscosity index and excellent evaporation resistance, hydrolytic stability, and low-temperature fluidity. The present invention relates to a lubricating base oil for a fluid bearing containing a compound represented by general formula (1): wherein Rrepresents a linear C-Calkyl group, m represents an integer of 2 to 10, and n represents an integer of 4 to 14.

Lubricating base oil for fluid dynamic bearing

An object of the present invention is to provide a lubricant base oil for power transmission that has a high traction coefficient and a high flash point, and excellent low-temperature fluidity. The present invention relates to a lubricant base oil for power transmission containing a compound represented by formula (1): wherein Rto Rare the same or different, and each represents a hydrogen atom or a Clinear or branched alkyl group,any two of Rto Rmay bind to each other to form a Calkylene group, two Rs, two Rs, two Rs, two Rs, and two Rs may be individually the same or different, X is obtained by removing two hydroxyl groups from a Cbranched aliphatic diol and represents a divalent group containing no quaternary carbon, and the two hydroxyl groups are each of a primary alcohol.

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Kyoto, Japan

Hirotsugu Mochida