Compositions – Electrolytes for electrical devices
Patent
1991-01-31
1993-02-09
McAvoy, Ellen
Compositions
Electrolytes for electrical devices
252 67, 252 68, C09K 500, C10M10532
Patent
active
051850923
ABSTRACT:
The lubricating oil for refrigerator according to the present invention is a lubricating oil for refrigerator using 1,1,1,2-tetrafluoroethane refrigerant. Having esters as base oil, its viscosity range is between 2-30 mm/s at 100.degree.C. By adding esters alone or by adding esters having different viscosity to esters base oil, or by adding polymer, the viscosity is adjusted to obtain the lubricating oil suitable for various types of refrigerators. The lubricating oil thus obtained has excellent compatibility with 1,1,1,2-tetrafluoroethane refrigerant, which is an alternative to freon, and has low hygroscopic property and high heat-resistant property.
By reducing the total acid number to 0.05 mg KOH/g or less, the corrosion-resistant property and insulating property of lubricating oil are not decreased, and the lubricating oil for refrigerator having having high refrigerant stability, hydrolytic stability and insulating property can be obtained.
Further, by adding sulfur type anti-wear agent, the better anti-wear effect of the lubricating oil can be obtained on iron/aluminum contact portion in the refrigerator.
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Ashibe Kenji
Fukuda Masaaki
Nomura Takeshi
Ogano Satoshi
Ohta Mitsuo
McAvoy Ellen
Tonen Corporation
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