Antioxidant and antiwear additives for lubricants and fuels
AssigneeMobil Oil Corporation
InventorsAndrew G. Horodysky, Shih-Ying Hsu
Life of this patent
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Abstract
Reaction products of an organotin oxide, such as dibutyltin oxide, a diorgano dithiophosphoric acid such as di-(2-ethylhexyl)dithiophosphoric acid and an alkenyl or polyalkenyl succinic anhydride, such as dodecenyl succinic anhydride, are effective multifunctional antioxidant and antiwear additives in lubricants, greases and fuels.
Claims29
A lubricant or fuel additive having multifunctional antioxidant/antiwear properties comprising a reaction product made by reacting a hydrocarbon substituted phosphoric acid and a hydrocarbon substituted succinic anhydride to produce an intermediate which is post-reacted with a hydrocarbon substituted organotin compound.
A lubricating oil composition comprising a major amount of a lubricating oil and a minor multifunctional antioxidant/antiwear amount of a reaction product made by reacting a hydrocarbon-substituted phosphoric acid and a hydrocarbon-substituted succinic anhydride to produce an intermediate which is post-reacted with a hydrocarbon-substituted organotin compound.
A method of making a lubricant composition comprising blending a major amount of a lubricant and a minor multifunctional antioxidant/antiwear amount of a reaction product made by reacting a hydrocarbon-substituted phosphoric acid and a hydrocarbon-substituted succinic anhydride to produce an intermediate which is post-reacted with a hydrocarbon-substituted organotin compound.
A lubricant additive comprising a reaction product of a reaction intermediate, of a hydrocarbon substituted phosphoric acid and a hydrocarbon substituted succinic anhydride, and a hydrocarbon substituted organotin compound.
A method of making a lubricant additive comprising reacting a hydrocarbon substituted phosphoric acid and a hydrocarbon substituted succinic anhydride to produce a reaction intermediate;
- reacting the reaction intermediate with a hydrocarbon substituted organotin compound to produce the lubricant additive.
Dependencies are inferred from the claim text.