Back to results
US 7,479,239 B2Granted
1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone compositions comprising a hydrofluorocarbon and uses thereof
AssigneeE.I. du Pont de Nemours and Company
InventorsBarbara Haviland Minor, Mario Joseph Nappa, Allen Capron Sievert, Thomas J. Leck
Life of this patent
Estimating the term…
Abstract
Disclosed herein are refrigerant and heat transfer fluid compositions comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one hydrofluorocarbon for use in refrigeration and air conditioning systems employing a centrifugal compressor. The compositions may be azeotropic or near-azeotropic.
Claims16
A azeotropic or azeotropic-like composition wherein the composition comprises:
- about 1 to about 99 weight percent 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and about 99 to about 1 weight percent 1,1,2,2-tetrafluorocyclobutane.
Dependencies are inferred from the claim text.