| 摘要 |
PURPOSE:A novel lubricating oil for cold rolling of metallic material, having improved lubricating properties, surface cleaning properties, improved heat resistance and stability to oxidation, containing a specific monoester, a specific dimer acid, specific fats and oils, and a specific antioxidant in a specified ratio. CONSTITUTION:The aimed lubricating oil containing (A) 40-90wt% monoester of 12-22C fatty carboxylic acid and 1-12C fatty alcohol, (B) 0.5-10wt% dimer acid of 16-20C higher fatty unsaturated acid and/or polymer acid, (C) (i) 10-25wt% fats and oils of (ii) 5-70wt% ester having 750-7,500mol.wt. obtained by condensing the component B with a polyol under heating, and reacting the residual carboxyl group of hydroxyl group of the polyester with 1-22C alcohol or 12-22C fatty acid, (D) 0.3-10wt% phenolic antioxidant and (E) 0.3-10wt% sulfur antioxidant. |
