| 摘要 |
PURPOSE:To obtain an azeotrope pseudo azeotrope composition usable as a chlorofluorocarbon(CFC) substitute, having excellent characteristics as a solvent, etc., comprising R225cb, R113 and cis-1,2-dichloroethylene. CONSTITUTION:An azeotrope composition comprising (A) 32wt.% 1,3- dichloro-1,1,2,2,3-pentrafluoropropane (R225cb), (B) 53wt.% 1,1,2-trichloro-1,2,2- trifluoroethane (R113) and (C) 15wt.% cis-1,2-dichloroethylene and a pseudo azeotrope composition comprising 19-43wt.% component A, 39-60wt.% composition B and 8-22wt.% component C, preferably 27-37wt.% component A, 48-58wt.% component B and 9-19wt.% component C. The composition is incombustible, can reduce an amount of fluorocarbons used while satisfying excellent characteristics of the fluorocarbons, has no variability of composition during recycling because of existence of azeotropic point, is usable in the same way as conventional single fluorocarbon and requires no drastic change of existing technology. |
