| abstract |
PURPOSE: To provide the subject composition composed of R225ca, R225cb and 2-bromopropane, having excellent characteristics comparable or superior to those of conventional fluorocarbons and usable as a fluorocarbon substitute. n CONSTITUTION: The objective composition can be produced by compounding (A) 1,1-dichloro-2,2,3,3,3-pentafluoropropane (R225ca), (B) 1,3-dichloro-1,1,2,2,3- pentafluoropropane (R225cb) and (C) 2-bromopropane at weight ratios (A:B:C) (wt.%) of (6-66):(5-84):(24-48), preferably (49-60):(5-15):(31-45), especially 54:10:36 (azeotropic composition). Since the composition has azeotropic point, it causes little variation of the composition in recycling and is usable similarly to conventional simple fluorocarbon. It exhibits higher dissolving power than R113 when used as a solvent. n COPYRIGHT: (C)1990,JPO&Japio |