C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
253/116
C10M 129/16 (2006.01) C10M 105/52 (2006.01) C10M 105/54 (2006.01) C10M 107/38 (2006.01) C10M 111/04 (2006.01) C10M 129/90 (2006.01) C10M 171/00 (2006.01)
Patent
CA 2004829
FLUORINATED LUBRICATING COMPOSITIONS ABSTRACT OF THE DISCLOSURE The present invention provides a novel lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37°C, and a viscosity index of at least 20. The composition is miscible in combination with tetrafluoroethane in the range between -40°C and at least +20°C. The novel lubricating composition is particularly useful with tetrafluoroethane in refrigeration and air-conditioning applications. As such, the present invention also provides a composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37°C, and a viscosity index of at least 20. The lubricant is miscible in combination with the tetrafluoroethane in the range between about -40°C and at least about +20°C. 2587J
Nalewajek David
Pham Hang T.
Thomas Raymond H. P.
Wilson David P.
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
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