Back to results
US 4,826,629 AGranted
Non-metallic multifunctional lubricant additives and compositions thereof
AssigneeMobil Oil Corporation
InventorAbraham O. M. Okorodudu
Life of this patent
Estimating the term…
Abstract
Multifunctional (antiwear/anitoxidant) additives prepared by reaction of diorganophosphorodithioic acids and a sulfurous-oxyhalide, e.g. thionyl chloride impart resistance to oxidation and abrasion when incorporated into lubricating oils.
Claims18
A compound of the formula
- [(RO).sub.2 P(S)S].sub.2 SO
- where R is hydrocarbyl having from 6 to about 32 carbon atoms and wherein hydrocarbyl is selected from aryl, aralkyl, alkaryl and cycloalkyl groups and wherein said aryl groups have from 6 to about 14 carbon atoms.
A lubricant composition comprising a major amount of a lubricant and a minor antiwear/antioxidant amount of a compound of the formula
- [(RO).sub.2 P(S)S].sub.2 SO
- where R is hydrocarbyl containing 1 to about 32 carbon atoms.
A method of making a compound of the formula
- [(RO).sub.2 P(S)S].sub.2 SO
- where R is hydrocarbyl having from 6 to about 32 carbon atoms and wherein hydrocarbyl is selected from aryl, aralkyl, alkaryl and cycloalkyl wherein the aryl groups have from 6 to about 14 carbon atoms comprising reacting a dihydrocarbyl phosphorodithioic acid with a sulfurous oxyhalide in a molar ratio of from about 2.2:1 to about 2.5:1 under ambient conditions of temperature and pressure.
Dependencies are inferred from the claim text.