Lubricant composition and lubricating system
AssigneeDaicel Corporation
InventorsNorihiro Kimoto, Tomohiro Goto
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Abstract
The present invention provides a lubricant composition suitable for reducing friction between sliding members such as those within a pump for circulating a heat medium of a heat pump device, and a lubricating system using the composition as a heat medium. A lubricant composition 10 of the present invention comprises: an antifreeze liquid 11 containing ethylene glycol; and 0.01 mass % or less of nanodiamond particles 12. The nanodiamond particles 12 are preferably detonation nanodiamond particles. The lubricant composition 10 is preferably a liquid composition for a heat pump. In addition, the lubricating system of the present invention uses the lubricant composition 10 as a heat medium.
Claims15
A lubricant composition comprising:
- an antifreeze liquid containing ethylene glycol;
- and
- 0.0003 to 0.006 mass % of nanodiamond particles;
- wherein the zeta potential of the nanodiamond particles is from −50 to −30 mV, wherein the zeta potential is measured by Doppler electrophoresis at a measurement temperature of 25° C.
Dependencies are inferred from the claim text.