High conductivity fluid for air compressor applications
OwnerMichael G. Foster, Mark R. Baker +2inventors
InventorsMichael G. Foster, Mark R. Baker, Carrie S. Briggs, Casey R. Fiting
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Abstract
The disclosed technology relates to a lubricant composition containing a polyalkylene glycol in which greater than 50% of the repeating units in the polyalkylene glycol contain an alkylene oxide derived moiety comprising a C4 or greater alkyl group. The lubricant compositions are particularly useful in compressors, such as a reciprocating rotary vane, scroll, or rotary screw air compressor.
Claims21
A lubricant composition comprising:
- (a) at least one oil of lubricating viscosity, and
- (b) at least one C4 or greater polyalkylene glycol, wherein greater than 50% of the repeating units in said at least one C4 or greater polyalkylene glycol contain an alkylene oxide derived moiety comprising C4 or greater alkyl.
The lubricant of clami 1, wherein said C4 or greater polyalkylene glycol of component (b) is present at 5 percent by weight or greater.
A method of operating an air compressor comprising lubricating said air compressor with a lubricant composition comprising (a) at least one oil of lubricating viscosity, and (b) at least one C4 or greater polyalkylene glycol, wherein greater than 50% of the repeating units in said at least one C4 or greater polyalkylene glycol contain a C4 or greater alkylene oxide moiety.
A method of maintaining the conductivity of a compressor lubricant through multiple heat cycles, comprising lubricating said air compressor with a lubricant composition comprising (a) at least one oil of lubricating viscosity, and (b) at least one C4 or greater polyalkylene glycol, wherein greater than 50% of the repeating units in said at least one C4 or greater polyalkylene glycol contain a C4 or greater alkylene oxide moiety.
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Dependencies are inferred from the claim text.