| 摘要 |
<p>The present invention provides a lubricating oil composition exhibiting more excellent flame retardancy and biodegradability. The biodegradable lubricating oil composition of the invention has flame retardancy and contains (1) a base oil containing a plant-derived oil in an amount of 60 mass% or more, and a polyol ester in an amount of 40 mass% or less, and (2) a polymethacrylate having a mass average molecular weight of 20,000 to 300,000 in an amount of 0.1 to 5 mass%.</p> |
