ASHLESS ADDITIVE FORMULATIONS SUITABLE FOR HYDRAULIC OIL APPLICATIONS

摘要

An ashless additive formulation, particularly suited for hydraulic oil applications, comprising a particular concentration of a monothiophosphate ester and a dithiophosphate ester was found to have improved performance properties and good compatibili ty with calcium containing packages. Lubricating compositions employing these monothiophosphate and dithiophosphate esters allow for low phosphorous content lubricating oil compositions.