| abstract |
A lubricant composition for a high load bearing oil comprises a synergistic mixture of a neutral alkyl phosphorus compound and a sulfur carrier. The neutral alkyl phosphorus compound is selected from neutral alkyl and alkoxyalkyl phosphate esters, phosphonate esters, phosphinate esters, and sulfites. Preferred neutral alkyl phosphorus compounds are triisobutyl phosphate, tributoxyethyl phosphate, and dioctyl octyl phosphonate. Preferred sulfur carriers are sulfurized fatty acid esters and dialkyl polysulfides. High load-bearing oils containing the lubricant composition of the present invention include metal working fluids, gear oils, extreme pressure turbine oils, and hydraulic oils. |