| 摘要 |
PURPOSE:To provide the subject composition composed of 1,1,2-trichloro-2,2- difluoroethane and either of tert.-butanol or acetone, capable of using as a substitute for flon and having excellent characteristics as a solvent, etc. CONSTITUTION:An azeotropic composition composed of (A) 1,1,2-trichloro-2,2- difluoroethane and either of (B) tert.-butanol or (C) acetone in a ratio of (A)=98.8wt.% and (B)=1.2wt.% or (A)=92.9wt.% and (B)=7.1wt.% and a pseudoazeotropic composition composed of 83.0-99.9wt.% (A) and 0.1-17.0wt.% either (B) or (C). The above-mentioned compositions can be used as substitutes for 1,1,2-trichloro-1,2,2-trifluoroethane and 1,1,1-trichloroethane while satisfying the excellent characteristics thereof. As the fluctuation of composition due to recycling is low, the above-mentioned compositions can be used in the same way as the conventional single flon without requiring a significant change of the conventional technique. |
