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