| 摘要 |
PURPOSE:To obtain the title composition consisting of 1,1,2-trichloro-2,2- difluoroethane and 1,1,1-trichloroethane, reduced in an amount of conventional fluorocarbon used and usable as a substitute for conventional fluorocarbon while satisfying excellent characteristics which the above-mentioned fluorocarbon has. CONSTITUTION:The fluorinated hydrocarbon based azeotropic composition consisting of (A) 56.9wt.% 1,1,2-triohloro-2,2-difluoroethane and (B) 43.1wt.% 1,1,1-trichloroethane and pseudoazeotropic composition consisting of 40-80wt.% component A and 20-60wt.% component B. The composition has high cleaning power and the composition ratio is not largely changed even when the composition is recycled and the composition can be used in a same manner as conventional single fluorocarbon and remarkable change of conventional technique is not required. The embodiment uses as a solvent are an agent for removing wax, ink, etc., and cleaning agent for precision machine, etc. |
