| 摘要 |
PURPOSE:To provide the subject azeotropic and pseudoazeotropic composition capable of being employed as a CFC substitute and also having excellent characteristics as a cleansing solvent, etc., containing 1,1,2-trichloro-2,2- difluoroethane and trichloroethylene in a specific ratio. CONSTITUTION:An azeotropic composition comprises 92.5wt.% of (A) 1,1,2- trichloro-2,2-difluoroethane and 7.5wt.% of (B) trichloroethylene, and a pseudoazeotropic composition comprises 80-97wt.% of the component A and 3-20wt.% of the component B. The compositions can be employed for various uses such as a thermal medium or foaming agent similarly as the conventional CFC, and are especially most suitable as a cleansing solvent substitute for R113 because of having an excellent property for dissolving and removing flux, oils, etc., compared with the R113 as a solvent. Since the composition can be used similarly as the convention CFC, the composition has an advantage not requiring the large change of the conventional techniques. |
