| abstract |
(57) [Problem] To provide a ternary chlorocarbon azeotropic composition useful as a substitute for a refrigerant 502. SOLUTION: Chlorodifluoromethane and pentafluoroethane, and one or more of dimethyl ether, propylene and difluoromethane; chlorodifluoromethane, 1,1,1-trifluoroethane and 1,1, 2,2,2-tetrafluoroethane or 1,1,1-trifluoroethane and octafluoropropane; and pentafluoroethane, and fluoroethane and 1,2,2, The problem is solved by an azeotropic composition of 2-tetrafluoroethane. |