Patent ID: 6958126

Claim:
A mixture of refrigerants that is a substitute for dichlorodifluoromethane, 1,1,1,2-tetrafluoroethane and R-500 (73.8 weight percent dichlorodifluoromethane and 26.2 weight percent 1,1-difluoroethane) refrigerants, comprising about 3 to 20 weight percent pentafluoroethane; and about 55 to 96 weight percent 1,1,1,2-tetrafluoroethane; and about 0.5 to 4 weight percent propane; and about 0.5 to 7 weight percent dimethyl ether (DME); and about 0 to 12 weight percent 1,1,1,2,3,3,3-heptafluoropropane, with the weight percentages of the components of the mixture being weight percentages of the overall mixture.