| 摘要 |
PURPOSE:To provide a lubricating oil compsn. having high lubricating properties and excellent stability to oxidation and corrosion preventive effect, prepd. by adding a combination of a compd. selected from among sorbitan ester of fatty acid, coconut oil fatty acid, etc. and phosphoric ester, to a base lubricating oil. CONSTITUTION:The lubricating oil compsn. is prepd. by adding a combination of (A) one compd. selected from among sorbitan ester of fatty acid (e.g. sorbitan mono-oleate), glycerine ester of fatty acid, palm kernel oil fatty acid, coconut oil fatty acid, compd. of the formula (where R is 12-24C fatty acid, etc.) (e.g. zinc stearate), a mixt. of fatty oil and fatty acid and reaction product of polyalkylene polyamine and fatty acid or oxidized mineral oil, and (B) phosphoric ester (amine salt) (e.g. oleyl acid phosphate) to a base lubricating oil (e.g. mineral oil and synthetic oil). |
