| 摘要 |
PURPOSE:To obtain the subject composition having excellent characteristics comparable or superior to those of conventional fluorocarbons and suitable as a fluorocarbon substitute by using R244ca, R225ca and 2-bromopropane as essential components. CONSTITUTION:The objective azeotropic composition is composed of (A) 8wt.% of 1-chloro-2,2,3,3-tetrafluoropropane (R244ca), (B) 58wt.% of 1,1-dichloro-2,2,3,3,3- pentafluoropropane (R225ca) and (C) 34wt.% of 2-bromopropane and the pseudo- azeotropic composition is composed of 3-58wt.% of A, 6-71wt.% of B and 3-44wt.% of C, preferably 3-23wt.% of A, 52-62wt.% of B and 9-39wt.% of C. The composition has azeotropic point, causes little variation of composition in recycling and can be used in similar manner as conventional simple fluorocarbon without necessitating considerable change of technology. It has higher dissolving power than conventional R113 when used especially as a solvent. |
