| 摘要 |
<p>A refrigerator oil comprises an ester obtained from: pentaerythritol; and a carboxylic acid mixture comprising n-pentanoic acid in an amount of 20 to 50 % by mass; n-heptanoic acid in an amount of 20 to 50 % by mass and 3,5,5-trimethylhexanoic acid in an amount of 5 to 60 % by mass, of the total amount of the carboxylic acid mixture.</p> |
