| 摘要 |
PURPOSE:To obtain the title mixture having excellent refrigeration and heating efficiency, usable for refrigerator and heat pump and having excellent thermal stability, by using specific hydrocarbons, dichlorodifluoromethane and difluoroethane as essential components. CONSTITUTION:The objective mixture contains (A) at least one kind of 4-5C hydrocarbons (preferably n-butane, isobutane, cyclobutane, n-pentane, isopentane or cyclopentane), (B) dichlorodifluoromethane and (C) 1,1-difluoroethane as essential components. The weight ratio of B:C is preferably 73.8:26.2. |
