Refrigeration lubricant blends

Compositions – Electrolytes for electrical devices

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252 52R, 252 58, 252 68, C01M12904

Patent

active

049004638

ABSTRACT:
The present invention provides a lubricating composition. The composition comprises a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37.degree. C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25.degree. C. The blend is miscible in combination with the tetrafluoroethane in the range between 0.degree. C. and at least +5.degree. C.

REFERENCES:
patent: 4267064 (1981-05-01), Sasaki
patent: 4302343 (1981-11-01), Carswell
patent: 4428854 (1984-01-01), Enjo
patent: 4431557 (1984-02-01), Shimizu
patent: 4454052 (1984-06-01), Shoji
patent: 4755316 (1988-07-01), Magid
Fundamental of Lubrication in Refrigeration Systems and Heat Pumps, ASHRAE TRANSACTIONS 90(2B) 763 (1984).
Evaluation of Lubricants for Refrigeration and Air-Conditioning Compressors, ASHRAE TRANSACTIONS 90(2B) 784 (1984).
1980 ASHRAE Systems Handbook, Chapter 32.
Research Disclosure 17463, Oct. 1978 by DuPont.

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