Lubricant refrigerant composition for hydrofluorocarbon (hfc) refrigerants

摘要

A lubricant-refrigerant composition contained within a compression refrigeration system is disclosed which comprises(A) at least one fluorine-containing hydrocarbon refrigerant containing 1 to 3 carbon atoms, further wherein fluorine is the only halogen in said fluorine-containing hydrocarbon with the proviso that 1,1,1,2-tetrafluoroethane is not the sole refrigerant; and(B) at least one lubricant comprising(1) a hydrocarbyl substituted arene,(2) a phosphate ester,(3) an organic ester of a carboxylic acid and an alcohol,(4) a perfluoropolyethylene,(5) an ether;(6) a polyether;(7) a polyalphaolefin; or(8) a mineral oil;wherein at a temperature of above -60° C. a phase separation occurs such that at least two phases are formed, said phases being a refrigerant rich phase and a lubricant rich phase, further wherein the lubricant rich phase resides below the refrigerant rich phase.