Greenblum & Bernstein, P.L.C.
Working fluid composition for refrigerator, refrigeration oil, and method for producing same
A working fluid composition for a refrigerating machine of the present invention comprises: a refrigerating machine oil comprising a complex ester as a base oil; and a hydrocarbon refrigerant having 2 to 4 carbon atoms, the complex ester being obtainable by further esterifying, with at least one selected from a monohydric alcohol having 1 to 20 carbon atoms and a fatty acid having 2 to 20 carbon atoms, an ester intermediate obtained by reacting a neopentyl polyol with a dibasic acid, and having an acid value of 0.5 mgKOH/g or less, the refrigerating machine oil having a kinematic viscosity at 100° C. of 2 to 50 mm2/s.
JX NIPPON OIL & ENERGY CORPORATION
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Masanori Takeshi Ken Kuniko
Saito Okido Sawada Adegawa