| 摘要 |
PURPOSE:To obtain the subject composition, composed of R113,2,2- dimethylbutane and 2-methylpentane and/or 3-methylpentane, capable of reducing the amount of conventional fluorocarbons used, satisfying excellent characteristics of the aforementioned fluorocarbons and usable as a substitute fluorocarbon. CONSTITUTION:An azeotropic composition composed of (A) 82-96wt.% 1,1,2- trichloro-1,2,2-trifluoroethane(R113), (B) 3-35wt.% 2,2-dimethylbutane, (C) 0.1-6wt.% 2-methylpentane and/or (D) 0.1-6wt.% 3-methylpentane. Alternatively, a composition, obtained by further adding either of methanol and ethanol thereto and composed of 65-93wt.% component (A), the above-mentioned amounts of the components (B), (C) and (D) and 1-13wt.% methanol or 68-93wt.% component (A), the aforementioned amounts of the components (B), (C) and (D) and 1-10wt.% ethanol. The above-mentioned composition has small fluctuation of composition even in recycling and provides the same usage as that of a conventional single fluorocarbon without requiring a remarkable change in conventional technology. |
