Oxidized sulfurized isobutylene lube oil additives
AssigneeMobil Oil Corporation
InventorCostandi A. Audeh
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Abstract
Sulfurized isobutylene is reacted with a mild oxidizing agent under conditions sufficient to effect the appearance of new infra red frequency bands at 1300 cm.sup.-1 and 1030 cm.sup.-1 indicative of the formation of sulfoxides and sulfones and a liquid oxidized sulfurized isobutylene product soluble in a lubricating composition is recovered. The resulting purified product imparts improved bearing life when incorporated into lubricant compositions.
Claims10
A process for making a lubricant additive consisting of reacting a liquid sulfurized isobutylene with a mild oxidizing agent in a mole ratio of oxidizing agent to sulfurized isobutylene of between about 0.5 and about 2.5 moles of equivalent oxygen to 1 mole of sulfurized isobutylene at a reaction temperature between about 20.degree. C. and about 95.degree. C. under conditions sufficient to effect the appearance of new infra red frequency bands at 1300 cm.sup.-1 and 1030 cm.sup.-1 indicative of the formation of sulfoxides and sulfones and recovering a liquid oxidized sulfurized isobutylene product soluble in a lubricating composition.
Dependencies are inferred from the claim text.