| 摘要 |
PURPOSE:To obtain the subject mixture, composed of any two or more of R225ca, R225cb and R224ca and methanol, capable of reducing the amount of conventional fluorocarbons used and usable as a substitute fluorocarbon while satisfying excellent characteristics of the aforementioned fluorocarbons. CONSTITUTION:A mixture composed of any two or more of (A) 1,1- dichloro-2,2,3,3,3-pentafluoropropane (R225ca), (B) 1,3-dichloro-1,2,2,3,3- pentafluoropropane (R225cb) and (C) 1 chloro-2,2,3,3-tetrafluoropropane (R224ca) and (D) methanol. For example, the amounts thereof are 14-96wt.%, component (A), 2-84wt.% component (B), 1-83wt.% component (C) and 1-16wt.% component (D) or 45-98wt.% component (A), 1-54wt.% component (C) and 1-16wt.% component (D). The aforementioned mixture has especially high detergency with hardly any fluctuation of composition even in recycling and is capable of providing the same usage as that of a conventional single fluorocarbon. |
