| abstract |
A refrigerant composition useful as a substitute for chlorodifluoromethane (CHCIF2, HCFC-22). The refrigerant mixture has a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent selected from perfluoropropane (C3F8, PFC-218), cyclopropane (C3H6, RC-270) and butane (C4H10, R-600); and a third constituent selected from 1,1-difluoroethane (CH3CHF2, HFC-152a), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb) and bis(difluoromethyl)ether (CHF2OCHF2, HFE-134). |