Loading patent…
AssigneeE. I. Du Pont de Nemours and Company
InventorsDiana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
Estimating the term…
This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
An azeotropic or azeotrope-like composition consisting essentially of effective amounts of HFC-32 (CH2F2) and a hydrofluoroether selected from the group consisting of HFE-227caEβγ (CHF2OCF2CF3) and HFE-227eaE (CF3OCFHCF3) to form an azeotropic or azeotrope-like composition, and wherein after 50 weight percent of said composition has evaporated, the difference in vapor pressure between the original composition and the remaining composition is less than 10 percent.
An azeotropic or azeotrope-like composition consisting essentially of HFC-32 (CH2F2) and a hydrofluoroether selected from the group consisting of HFE-227caEβγ (CHF2OCF2CF3) and HFE-227eaE (CF3OCFHCF3), wherein said HFC-32 and HFE-227caEβγ composition has a vapor pressure of from about 255.3 to about 269.7 psia at 25° C.;
An azeotropic or azeotrope-like composition consisting essentially of HFC-32 (CH2F2) and a hydrofluoroether, said composition selected from the group consisting of:
Dependencies are inferred from the claim text.