Jxtg Nippon Oil & Energy Corporation

Jx Nippon Oil Energy Corporation

Eneos Corporation

Hiroko Shimpo

Hitoshi Takahashi

Takeshi Okido

Souichirou Konno

Ken Sawada

Masanori Saito

Kentaro Yamaguchi

Kuniko Adegawa

Hidetoshi Ogata

Tsutomu Takahashi

Katsuya Takigawa

Yuya Mizutani

Kuniko Takahashi

The present invention provides a refrigerating machine oil comprising:  [In formula (I), R, Rand Reach independently represents a hydrogen atom or a hydrocarbon group, and Rrepresents an oxygen-containing organic group or a Chydrocarbon group.]

Refrigerating machine oil

The present invention provides a working fluid composition for a refrigerating machine containing: a refrigerating machine oil containing: a first ester that is a polyol ester of dipentaerythritol and at least one fatty acid selected from fatty acids having 4 to 10 carbon atoms, and has a kinematic viscosity at 100&#xb0; C. of 7.0 mm/s or more; and a second ester that is a complex ester of a polyhydric alcohol containing at least one selected from neopentyl glycol, trimethylolpropane and pentaerythritol, a polybasic acid having 6 to 12 carbon atoms, and a monohydric alcohol having 4 to 18 carbon atoms or a fatty acid having 4 to 18 carbon atoms; and a refrigerant containing difluoromethane.

Refrigerating machine oil and refrigerating machine working fluid composition

The present invention provides a refrigerating machine oil comprising a base oil; a sulfide compound; and an orthophosphoric acid ester, wherein a content of the sulfide compound is 0.01 to 2.0% by mass and a content of the orthophosphoric acid ester is 0.1 to 5.0% by mass, based on a total amount of the refrigerating machine oil, and the refrigerating machine oil having a kinematic viscosity at 40&#xb0; C. of 3 to 500 mm/s.

Refrigerating machine oil, and working fluid composition for refrigerating machines

The present invention provides a refrigerating machine oil containing an ester base oil obtained from pentaerythritol and mixed fatty acids of a fatty acid having 8 carbon atoms and a fatty acid having 9 carbon atoms, wherein a ratio of a weight average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, of the ester base oil is 1.06 to 1.20, and used with a mildly flammable hydrofluorocarbon refrigerant.

Refrigerator oil and working fluid composition for refrigerator

The present invention provides a refrigerating machine oil comprising a polyvinylether having a structural unit represented by the following formula (1): wherein R, R, and Rmay be the same or different from each other and each represent a hydrogen atom or a hydrocarbon group, Rrepresents a divalent hydrocarbon group or an ethereal oxygen-containing divalent hydrocarbon group, Rrepresents a hydrocarbon group, m represents an integer of 0 or more, and in the case where m is 2 or more, a plurality of Rmay be the same or different from each other, a number average molecular weight Mn is 500 or more and 2000 or less, a ratio of a weight average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.10 or more and 1.25 or less, and the refrigerating machine oil is used with a mildly flammable hydrofluorocarbon refrigerant.

Refrigerator oil, and working fluid composition for refrigerators

The present invention provides a refrigerating machine oil comprising, as a base oil, at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less, wherein the refrigerating machine oil is used with a refrigerant comprising 15% by mass or more of difluoromethane, 15% by mass or more of pentafluoroethane, 15% by mass or more of 2,3,3,3-tetrafluoropropene and 15% by mass or more of 1,1,1,2-tetrafluoroethane based on the total amount of the refrigerant.

The present invention provides a working fluid composition for a refrigerating machine containing: a refrigerating machine oil containing, as a base oil, a mixed ester of (A) a complex ester synthesized from a polyhydric alcohol such as neopentyl glycol, a polybasic acid having 6 to 12 carbon atoms, a monohydric alcohol having 4 to 18 carbon atoms and the like, and (B) a polyol ester synthesized from a polyhydric alcohol such as neopentyl glycol and a monocarboxylic fatty acid having 4 to 18 carbon atoms, in a mass ratio of (A) the complex ester/(B) the polyol ester of 5/95 to 95/5; and a refrigerant such as carbon dioxide.

Working fluid composition for refrigerating machine and refrigerating machine oil

The present invention provides a refrigerating machine oil comprising: a base oil; a sulfide compound; and a gallate, wherein a content of the sulfide compound is 0.01 to 2.0% by mass and a content of the gallate is 10 to 500 ppm by mass based on a total amount of the refrigerating machine oil, and the refrigerating machine oil having a kinematic viscosity at 40&#xb0; C. of 3 to 500 mm/s.

Refrigerating machine oil and working fluid composition for refrigerating machine

The present invention provides a working fluid composition for a refrigerator machine comprising a base oil comprising an ether-based compound, a carbodiimide compound, and an unsaturated fluorinated hydrocarbon refrigerant. The present invention also provides a refrigerating machine oil comprising a base oil containing an ether-based compound and a carbodiimide compound, the refrigerating machine oil being used together with an unsaturated fluorinated hydrocarbon refrigerant.

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Tokyo, Japan

Hiroko Shimpo