| 摘要 |
<p>A lubricating oil composition for refrigerators, characterized by comprising as the main component a polyol ester prepared from both a polyhydric alcohol selected from among pentaerythritol, dipentaerythritol, trimethylolpropane, and neopentyl glycol and an aliphatic monocarboxylic acid having 4 to 20 carbon atoms and by having an acid value of 0.02mgKOH/g or below and a hydroxyl value of 5mgKOH/g or below; and compressors with the composition. The lubricating oil composition is applicable to refrigerators with refrigerants having specific structures such as unsaturated fluorinated hydrocarbons usable as refrigerator in current car air conditioner systems or the like and is excellent in the compatibility with the refrigerants and sealing properties. Further, the lubricating oil composition attains a low coefficient of friction in the sliding part and is excellent in stability.</p> |
