| abstract |
Lubricating oil additive comprising a polyalcohol partial ether compound containing at least two hydroxyl groups and at least one aliphatic hydrocarbon group having at least one double bond via an ether bond. This lubricating oil additive is added to the lubricating oil base oil to form a lubricating oil which has excellent wear resistance, is less corrosive to metals, less softens rubbers and resins, and reduces the occurrence of sludge due to thermal oxidation. Thus, this lubricant is mixed with the refrigerant to form a working fluid that can be suitably used in household refrigerators, car air conditioners, industrial refrigerators and air conditioners. |