ADDITIVES FOR LUBRICATING OILS AND FUEL OILS LUBRICATING OIL COMPOSITIONS AND FUEL OIL COMPOSITIONS

摘要

The present invention relates to additives for lubricating oils and additives for natural oils based on the disulfide compound represented by the following general formula (I) or (IV):;Formula I;R ¹ OOC-A ¹ -S _x -A ² -COOR ²;Where;R ¹ and R ² are each independently a hydrocarbyl group having 1 to 30 carbon atoms which may include an oxygen atom, a sulfur atom or a nitrogen atom, and A ¹ and A ² are each independently a group represented by CR ³ R ⁴ , R ³ and R ⁴ are each independently hydrogen or a hydrocarbyl group having 1 to 20 carbon atoms,;x represents 2.;Formula IV;R ¹ OOC-A ³ -S _x -A ⁴ -COOR ²;Where;R ¹ and R ² are the same as above,;A ³ and A ⁴ are each independently a group represented by CR ⁵ R ⁶ -CR ⁷ R ⁸ ,;R ⁵ to R ⁸ are each independently hydrogen or a hydrocarbyl group having 1 to 20 carbon atoms,;x represents 2.;It is a sulfur-based extreme pressure additive that has excellent performance as an extreme pressure additive or an antiwear agent, has low corrosion resistance to nonferrous metals, and can be preferably used for lubricating oil and natural oil.