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 such as n-butane and monochlorodifluoromethane as essential components. CONSTITUTION:The objective mixture contains (A) at least one kind of hydrocarbons selected from n-butane, cyclobutane, n-pentane, isopentane and cyclopentane and (B) monochlorodifluoromethane as essential components. In the case of necessitating the improvement in the thermal stability for the use under severe condition, the working medium is added with about 1wt.% of a stabilizer such as dimethyl phosphite or triphenoxyphosphine sulfide. |