| 摘要 |
Mixtures of 1,1,1,2-tetrafluoroethane ("HFC-134a") or 1,1,2,2-tetrafluoroethane ("HFC-134") and 1,1,1,2,3,3,3-heptafluoropropane ("HFC-227ea") are provided. More specifically, the invention provides mixtures of HFC-134a or HFC-134 and HFC-227ea that are environmentally desirable replacements for chlorofluorocarbons and hydrochlorofluorocarbons as refrigerants, foam blowing agents, aerosol propellants, fire extinguishing agents, gaseous dielectrics, heat transfer media, metered dose inhalers, and the like. |
