Lubricating oil for flon refrigerant
AssigneeIdemitsu Kosan Co., Ltd.
InventorMasato Kaneko
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Abstract
A lubricating oil for a flon refrigerant, containing a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content of not more than 200 ppm as a main component. The lubricating oil of the present invention has good stability in the presence of a flon refrigerant, does not cause the copper plating phenomenon and has good compatibility with not only flon-11 and flon-12 but also sparingly soluble refrigerants such as hydrogen-containing flon compounds and perfluoroalkane.
Claims6
A lubricating oil for a flon refrigerant, containing as the main component a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content of between 50 and 200 ppm.
A lubricating oil for a flon refrigerant containing as the main component a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content prior to admixture with the flon refrigerant, of between about 50 ppm and 100 ppm.
A method of lubricating a car air conditioner which comprises introducing into said air conditioner a lubricant oil, containing as the main component a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, of viscosity index of at least 150 and a water content of less than 200 ppm.
Dependencies are inferred from the claim text.