| 摘要 |
PURPOSE:To obtain an azeotrope or pseudo azeotrope composition having incombustibility, capable of reducing an amount of a conventional fluorocarbon used while satisfying excellent characteristics of the fluorocarbon, by combining R225ca with R113 and trans-1,2-dichloroethylene. CONSTITUTION:(A) 1,1-Dichloro-2,2,3,3,3-pentafluoropropane (R225ca) is combined with (B) 1,1,2-trichloro-1,2,2-trifluoroethane (R113) and (C) trans-1,2- dichloroethylene in the ratio of 28-52wt.% component A, 7-39wt.% component B and 25-48wt.% component C, preferably 36-46wt.% (especially 41wt.%) component A, 17-27wt.% (especially 22wt.%) and 32-42wt.% (especially 37wt.%) component C to give an azeotrope composition. Since the composition has an azeotropic point, the composition has no variability of composition during recycling, is usable in the same way as conventional single chlorofluorocarbon and requires no drastic change of existing technology. When the composition is used as a solvent, the composition shows higher dissolution power than R113. |
