| abstract |
PROBLEM TO BE SOLVED: To provide a composition containing a polyfluorinated olefin and HFC-32, which is particularly useful for a fixed refrigerator or an air conditioner. A heat transfer composition comprising 20-30% by weight difluoromethane (HFC-32) and 70-80% by weight 2,3,3,3-tetrafluoropropene (HFO-1234yf). Preferably, it consists of 20% by weight HFC-32 and 80% by weight HFO-1234yf, and further comprises polyol ester (POE), polyalkylene glycol (PAG), PAG oil, silicone oil, mineral oil, alkylbenzene (AB), and. A heat transfer composition provided in combination with a lubricant selected from poly (alpha-olefin) (PAO). [Selection diagram] None |