| 摘要 |
To replace chlorofluorocarbons as refrigerating fluids, the invention proposes to employ a mixture of dimethyl ether and 1,1,1,2-tetrafluoroethane. …<??>These compounds form an azeotrope which, at its normal boiling point (approximately -22.4 DEG C at 1.013 bar), contains approximately 62.3% by weight of 1,1,1,2-tetrafluoroethane. …<??>The mixture according to the invention can also be employed as an aerosol propellant or as a blowing agent for plastic foams. |
