| abstract |
Disclosed is a lubricant for compression refrigerating machines characterized by containing a polyvinyl ether compound which contains an alkylene glycol unit or polyoxyalkylene glycol unit and a vinyl ether unit in a molecule, while having a molecular weight of 300-3,000, and a dehydrating agent. This lubricant for compression refrigerating machines exhibits good compatibility in a carbon dioxide atmosphere, while having high viscosity index and excellent stability. In addition, this lubricant for compression refrigerating machines does not deteriorate due to hydrolysis. |