Lubricant compositions for refrigerators comprising polyalkylene glycol and a hydrocarbon solvent
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorWilliam L. Brown
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Abstract
Lubricant compositions are disclosed which comprise polyalkylene glycols and hydrocarbon solvents having 15 or less carbon atoms per molecule. The polyalkylene glycols are soluble in fluorocarbon-based refrigerants, such as for example, HFC-134a, and the hydrocarbon solvents are soluble in the polyalkylene glycols. Thus, the lubricant compositions are particularly well suited as lubricants in refrigeration systems, such as for example, automobile air conditioners, which contain fluorocarbon-based refrigerants. Refrigerant/lubricant compositions comprising refrigerants and the lubricant compositions are also disclosed.
Claims11
A refrigerant/lubricant composition comprising
- (I) a refrigerant comprising at least one of tetrafluoroethane and pentafluoroethane;
- and
- (II) a lubricant comprising:
- a) from about 50 to 99.9 wt. % of the lubricant of a polyalkylene glycol comprising at least one of oxyethylene units and oxypropylene units, said polyalkylene glycol;
- (i) having less than 10 wt % of oxyalkylene units having four or more carbon atoms based on the weight of the polyalkylene glycol;
- and
- (ii) being soluble at 70.degree. F. in refrigerant HFC-134a;
- and
- b ) from about 0.1 to 50 wt % of the lubricant of a hydrocarbon solvent having 15 or less carbon atoms per molecule, said hydrocarbon solvent being soluble in said polyalkylene glycol.
Dependencies are inferred from the claim text.