| abstract |
A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH 2 F 2 , HFC-32); a second constituent of pentafluoroethane (CHF 2 CF 3 , HFC-125); a third constituent of 1,1,1-trifluoroethane (CH 3 CF 3 , HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C 3 H 6 , RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF 3 CHFCF 3 , HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH 3 CF 2 CF 3 , HFC-245cb), isobutane (CH(CH 3 ) 2 CH 3 , R-600a), octafluorocyclobutane (C 4 F 8 , RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF 2 CHFCF 3 , HFC-236ea), butane (C 4 H 10 , R-600), bis(difluoromethyl)ether (CHF 2 OCHF 2 , HFE-134) and pentafluoroethylmethylether (CF 3 CF 2 OCH 3 , HFE-245). |