Abstract: The present invention relates to a lubricating composition containing an oil of lubricating viscosity and a dimercaptothiadiazole salt of a copolymer comprising units derived from monomers (i) an ?-olefin and (ii) an ethylenically unsaturated carboxylic acid or derivatives thereof (typically carboxylic acid groups or an anhydride), are partially esterified with an alcohol, or mixtures thereof, and wherein at least a portion of carboxylic acid groups not esterified are reacted with an amine. The invention further provides for a lubricating composition containing said copolymer. The invention further provides a method and use of lubricating composition in a mechanical device.

Abstract: The present invention relates to a lubricating composition containing an oil of lubricating viscosity and a dimercaptothiadiazole salt of a copolymer comprising units derived from monomers (i) an ?-olefin and (ii) an ethylenically unsaturated carboxylic acid or derivatives thereof (typically carboxylic acid groups or an anhydride), are partially esterified with an alcohol, or mixtures thereof, and wherein at least a portion of carboxylic acid groups not esterified are reacted with an amine. The invention further provides for a lubricating composition containing said copolymer. The invention further provides a method and use of lubricating composition in a mechanical device.

Abstract: A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and(A) at least about 1% by weight of at least one carboxylic derivative composition produced by reacting(A-1) at least one substituted succinic acylating agent containing at least about 50 carbon atoms in the substituent with(A-2) from about 0.5 equivalent up to about 2 moles, per equivalent of acylating agent (A-1), of at least one amine compound characterized by the presence within its structure of at least one HN<group; and(B) at least one alkali metal overbased salt of a hydrocarbyl-substituted carboxylic acid or a mixture of a hydrocarbyl carboxylic acid and a hydrocarbyl-substituted sulfonic acid having a metal ratio of greater than 2 in an amount sufficient to provide at least about 0.

Abstract: A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and(A) at least about 1% by weight of at least one carboxylic derivative composition produced by reacting(A-1) at least one substituted succinic acylating agent containing at least about 50 carbon atoms in the substituent with(A-2) from about 0.5 equivalent up to about 2 moles, per equivalent of acylating agent (A-1), of at least one amine compound characterized by the presence within its structure of at least one HN<group; and(B) an amount of at least one alkali metal overbased salt of a carboxylic acid or a mixture of a carboxylic acid and an organic sulfonic acid sufficient to provide at least about 0.

Abstract: A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and(A) at least about 1% by weight of at least one carboxylic derivative composition produced by reacting(A-1) at least one substituted succinic acylating agent containing at least about 50 carbon atoms in the substituent with(A-2) from about 0.5 equivalent up to about 2 moles, per equivalent of acylating agent (A-1), of at least one amine compound characterized by the presence within its structure of at least one HN< group; and(B) an amount of at least one alkali metal overbased salt of a carboxylic acid or a mixture of a carboxylic acid and an organic sulfonic acid sufficient to provide at least about 0.

Abstract: This invention relates to a lubricating oil composition, comprising:a major amount of an oil of lubricating viscosity; and(A) an amount of at least one alkali metal overbased salt of an acidic organic compound sufficient to provide at least about 0.005 equivalents of alkali metal per 100 grams of the lubricating composition;(B) at least about 1.13% by weight of at least one dispersant;(C) at least one metal dihydrocarbyl dithiophosphate; and(D) at least one antioxidant, provided that the lubricating oil composition is free of calcium overbased sulfonate; provided that the composition contains less than about 0.08% by weight calcium; and provided that (C) and (D) are not the same.

Abstract: The invention relates to a composition, comprising: at least one basic alkali metal salt of at least one hydrocarbyl-substituted acidic organic compound, wherein the hydrocarbyl group is derived from a polyalkene having an Mn of at least 600, provided that when the organic compound is a sulfonic acid, the polyalkene has an Mn of at least 900; and provided that when the acidic organic compound is a mixture of acidic organic compounds containing a carboxylic acid and a sulfonic acid which has a hydrocarbyl group derived from a polyalkene having an Mn of less than 900, then the carboxylic acid comprises at least 10% of the equivalents of the mixture. Methods for preparing the salts and lubricating compositions containing the salts are described.

Abstract: Functional fluids characterized as effective over a wide range of temperature including very high temperatures can be prepared, comprising:(A) a major amount of at least one synthetic base oil; and minor amount of(B) at least one phenolic compound selected from the group consisting of(B-1) metal-free, hindered phenols substituted with at least one alkyl group containing at lease about 6 carbon atoms, and alkylene coupled derivatives thereof;(B-2) neutral and basic alkaline earth metal salts of hindered phenols which are not alkylene or sulfur-coupled;(B-3) metal-free alkyl phenol sulfides or neutral and basic alkaline earth metal salts of alkyl phenol sulfides; and(B-4) neutral and basic alkaline earth metal salts of alkylene-coupled phenols; and(C) at least one non-phenolic antioxidant.

Abstract: This invention describes various compositions obtained from thiodiglycol or thiodiglycol polymers. The compositions have unique antioxidant capability and are useful in a variety of functional fluids, hydraulic fluids, automatic transmission fluids and generally in oils of lubricating viscosity such as crankcase oils or greases.

Abstract: The present invention deals with a particular antiemulsion agent which is useful in retarding foam and/or emulsion formation in an engine. In particular, the agent is effective at preventing or retarding emulsion or foaming in an engine oil.

Abstract: This invention describes phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

Abstract: This invention describes lubricant compositions comprising phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

Abstract: A thermal oxidatively stable synthetic fluid composition is disclosed. The composition is essentially comprised of an aromatic carboxylic acid ester of the general formula ##STR1## wherein Ar is an aromatic moiety, R is a neo hydrocarbyl group containing from about 5 to about 18 carbon atoms, with the proviso that R is not a cycloalkyl substituted neo hydrocarbyl group, R.sub.1 is a mono, di, tri or tetra functional hydrocarbyl group containing from 1 to about 18 carbon atoms, n is an integer from about 2 to about 4 and represents the total number of carboxylic acid ester groups on the aromatic moiety, a is an integer from about 1 to about 4, when a is 1 R.sub.1 is monovalent, when a is 2 R.sub.1 is divalent, when a is 3 R.sub.1 is trivalent and when a is 4 R.sub.1 is tetravalent, R.sub.2 is a hydrocarbyl group derived from a diol containing from about 2 to about 18 carbon atoms and x is an integer from 0 to about 4.

Abstract: This invention describes phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

Abstract: The present invention deals with a particular antiemulsion agent which is useful in retarding foam and/or emulsion formation in an engine. In particular, the agent is effective at preventing or retarding emulsion of foaming in an engine oil.

Abstract: The present invention deals with compositions containing sulfur and oxygen which are useful in lubricants and automatic transmission fluids.

Abstract: The use of aromatic amine or hindered phenols, and beta-thiodialkanol reaction products are described as being useful anti-oxidants.

Abstract: This invention described phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

Abstract: This invention describes phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

Abstract: This invention describes compositions containing nitrogen, sulfur and optionally oxygen which are useful as antioxidants for lubricants.