| 摘要 |
PURPOSE:To antioxidant for a lubricating oil, consisting of a 2,2,4-trimethyl-1, 2-dihydroquinoline polymer containing specific amounts of a dimeric component and monomeric component. CONSTITUTION:2,2,4-trimethyl-1,2-dihydroquinoline polymer containing 5wt% or more, preferably 25wt% or more, dimeric component and less than 10wt% monomeric component as an antioxidant, in an amount of usually 0.1-10wt%, based on preferably a mineral oil-based lubricating oil, is added to the lubricating oil. |
