초록

Fluid refrigeration compositions comprising a hydrocarbon lubricant, an immiscible refrigerant and an additive capable of reducing the interfacial tension between the hydrocarbon lubricant and refrigerant.

대표청구항 ▼

[ We claim:] [1.] A fluid refrigeration composition comprising a mixture of hydrocarbon lubricant(s) and polyol ester lubricant(s) in a weight ratio of polyol ester to hydrocarbon lubricant(s) from about 1:99 to 1:3, a fluorohydrocarbon refrigerant immiscible with the hydrocarbon lubricant(s) which

[ We claim:] [1.] A fluid refrigeration composition comprising a mixture of hydrocarbon lubricant(s) and polyol ester lubricant(s) in a weight ratio of polyol ester to hydrocarbon lubricant(s) from about 1:99 to 1:3, a fluorohydrocarbon refrigerant immiscible with the hydrocarbon lubricant(s) which contains at least one carbon atom and all the halogen groups of the fluorohydrocarbon are fluorine, and an effective amount of additive which reduces the interfacial tension at the interface between the hydrocarbon lubricant and refrigerant in liquid form to the point where the spreading coefficient(s) refrigerant liquid on steel is slightly positive enabling the refrigerant to displace hydrocarbon lubricant from steel wherein said additive is present in a concentration of 0.001 to 5 parts by weight per 100 parts by weight lubricant.