Abstract:
A friction reducing additive for addition to the lubricating oil crankcase of an internal combustion engine, such as in an automobile, is provided. The additive comprises (a) a hydrocarbon oil of lubricating viscosity; (b) an extreme pressure antiwear agent comprising: (i) an oil dispersion of solid inorganic film-forming potassium borate, (ii) antimony diaklylphosphorodithioate, and (iii) a liquid chlorinated paraffin; (c) an alkaline material; and (d) a viscosity index improver. The preferred additive composition of the present invention also contains an antioxidant and an antifoaming agent.
Abstract:
A lubricant composition comprising a major amount of a lubricating oil and an effective dispersant amount of both a hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals, and a polyol derivative prepared by contacting an aliphatic polyolefin with P.sub.2 S.sub.5 in the presence of sulfur and P.sub.2 S.sub.5, contacting the resultant polyolefin-P.sub.2 S.sub.5 reaction product with a steam, removing inorganic phosphorus acid from the steam treated polyolefin P.sub.2 S.sub.5 reaction product, and contacting the polyolefin P.sub.2 S.sub.5 reaction product with a neopentyl polyol. The combination of succinimide and polyol derivative exhibit enhanced dispercancy and/or detergency over either additive alone.
Abstract:
Lubricating oil compositions which contain polycarboxylic acid-glycol esters as friction modifiers in combination with hydrocarbon soluble alkenyl succinimide dispersants with reduced tendency toward formation of sediment upon storage through addition of small proportions of polyol or polyol anhydride partial ester of a fatty acid or an ethoxylated fatty acid, amine or amide stabilizer. Glycerol oleates are preferred stabilizer additive.
Abstract:
A lubricating oil composition is disclosed which comprises a major proportion of a lubricating oil and a minor proportion of each of a Group II metal dithiophosphate and composition having the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6 and R.sup.7 each are hydrogen or hydrocarbon containing 1-30 carbon atoms, and wherein R.sup.3 and R.sup.4 are independently selected from hydrogen, hydrocarbon containing from 1 to 30 carbon atoms, and acyl containing from 1 to 30 carbon atoms.
Abstract:
Metal salts of partially phosphosulfurized pentaerythritol and trimethylolpropane based hydroxyl-containing esters are effective as multifunctional additives, reducing friction, inhibiting oxidation and reducing bearing corrosion when incorporated into a variety of lubricating media.
Abstract:
Hydrocarbon lubricating oils with a tetrahydrocarbylammonium thiomolybdate having at least about 19 carbon atoms, such as dicocodimethylammonium thiomolybdate, solubilized in the oil are characterized by improved anti-friction properties.
Abstract:
Described are low ash, low phosphorus motor oils having improved oxidation stability as a result of the addition thereto of synergistic amounts of a dialkyldiphenylamine antioxidant and of a sulfurized polyolefin. The synergism between the two additives compensates for the decreased amounts of phosphorus in the form of zinc dithiophosphate such that the oils retain an SE quality rating.
Abstract:
Metallic dithiophosphates of the formula: ##STR1## in which R.sub.1 is an alkyl, alkenyl, cycloaliphatic, aryl, or heterocyclic radical, R.sub.2 and R.sub.3 are alkyl radicals, preferably C.sub.1 -C.sub.4 radicals, and m represents the valence of the metal M, M being a metal of Groups IIB, IIIB, IVB, or VIII of the Periodic System of Elements, preferably zinc. They are obtained by the action of P.sub.2 S.sub.5 on a monoester alcohol of the formula: ##STR2## and then by reaction of a metal oxide, such as zinc oxide, with the dithiophosphoric acid formed. These metallic dithiophosphates are useful as extreme-pressure and anti-wear additives for lubricating oils in amounts of between 0.2 and 10 percent, referred to the weight of lubricating oils.
Abstract:
Metal salts of hydrocarbyl oxazoline phosphorodithioic acids are novel compounds effective for reducing friction and wear when added to a lubricant.
Abstract:
Metal salts of phosphosulfurized hydrocarbyl oxazoline phosphorodithioic acids are novel compounds effective for reducing friction and wear when added to a lubricant.