Abstract: A lubricating oil composition which exhibits improved fuel economy and fuel economy retention which contains the combination of an overbased oil soluble calcium detergent additive and an oil soluble trinuclear friction modifying molybdenum compound, the two components functioning to provide an improvement in the friction reducing properties of the composition.

Abstract: Dithiocarbamyl derivatives, useful as multifunctional additives for lubricating oils, of the formula ##STR1## wherein Q is ##STR2## R.sup.1 and R.sup.2 are each independently C.sub.1 -C.sub.30 n-alkyl, C.sub.3 -C.sub.30 branched alkyl, C.sub.3 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 aryl, or C.sub.6 -C.sub.12 alkylaryl; R.sup.3 is C.sub.1 -C.sub.20 alkylene; R.sup.4 is --R.sup.3 --C(O)--O--; R.sup.5 and R.sup.6 are each independently hydrogen, C.sub.1 -C.sub.30 n-alkyl, C.sub.3 -C.sub.30 branched alkyl, C.sub.3 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 aryl, or C.sub.6 -C.sub.12 alkylaryl; R.sup.7 is C.sub.1 -C.sub.20 alkylene, optionally substituted with --OR.sup.5 or --COOH; R.sup.8 is --R.sup.3 --C(O)--NR.sup.5 --; n is 0, 1, 2 or 3; and y is 0, 1, 2, or 3.

Abstract: The invention relates to an extreme pressure lubricant composition, in per cent by weight, which includes from about 25 to about 37 percent polyalphaolefin, from about 1 to about 5 percent pentaerythritol ester of a fatty acid, from about 20 to about 35 percent of said methyl ester, from about 1 to about 10 percent of said copolymer of ethylene and propylene, from about 22 to about 32 percent of said bismuth salt and from about 1 to about 10 percent antimony diakyldithiocarbamate.

Abstract: Oil-soluble or oil-dispersible trinuclear molybdenum-sulfur compounds are made by reacting less than three, such as 1.5 to 2.5, preferably two to 2.1, molar equivalents of a disulfide with one molar equivalent of a compound containing the [Mo.sub.3 S.sub.13 ].sup.2- ion. The trinuclear compounds include S-containing ligands that are derived from the disulfide reactant via cleavage of the disulfide bond; the ligands are bound to the core via the S atoms.

Abstract: The present invention is directed to a zinc-molybdenum-based dithiocarbamate derivative which is a complex salt having the metallic components of zinc and molybdenum in the same molecule. When used as a lubricant additive, it imparts a notable friction-reducing effect to the lubricant composition in which it is incorporated, reducing its friction coefficient and improving its stability of friction coefficient at both low and high temperature, particularly at high temperature. In particular, it improves friction-related characteristics much more notably than a combination of a molybdenum and zinc compound.

Abstract: The compatibility with nitrile ester seals of lubricating compositions containing active sulphur-containing additives may be enhanced bt treating the additives, or concentrates containing them, or the composition themselves, with one or more olefinically unsaturated compounds selected from:(a) acyclic compounds having at least two double bonds with adjacent double bonds separated by two saturated carbon atoms;(b) compounds containing an acyclic ring, which ring contains at least, eight carbon atoms and at least two double bonds, each double bond being separated from the closest adjacent double bond(s) by two saturated carbon atoms; and(c) compounds containing a saturated alicyclic ring and at least one exocyclic double bond.

Abstract: A grease composition for constant velocity joints comprises (a) a base oil; (b) a urea thickener; (c) at least one organic molybdenum compound selected from the group consisting of molybdenum dithiocarbamate and molybdenum dithiophosphate; and (d) at least one calcium salt selected from the group consisting of calcium salts of petroleum sulfonates, calcium salts of alkyl aryl sulfonates, calcium salts of salicylate, calcium salts of phenates, calcium salts of oxidized waxes, overbasic calcium salts of petroleum sulfonates, overbasic calcium salts of alkyl aryl sulfonates, overbasic calcium salts of salicylate, overbasic calcium salts of phenates, and overbasic calcium salts of oxidized waxes. The grease composition exhibits good performance for reducing vibration and effectively lubricates the constant velocity joints to effectively reduce frictional wear and to eliminate vibration.

Abstract: The invention is a method for improving the friction reduction and friction reduction retention performance of a lubricating oil comprising adding to the lubricating oil a trinuclear molybdenum sulfur compound selected from the group of trinuclear molybdenum compounds preferably those having the formulas Mo.sub.3 S.sub.7 (dtc).sub.4 and Mo.sub.3 S.sub.4 (dtc).sub.4 and mixtures thereof wherein dtc represents independently selected diorganodithiocarbamate ligands containing independently selected organo groups and wherein the ligands have a sufficient number of carbon atoms among all the organo groups of the compound's ligands are present to render the compound soluble or dispersible in the lubricating oil. Concentrates of the composition are also included in the invention.

Abstract: Multifunctional molybdenum compounds, which are the reactive product of molybdenum dithiocarbamates and (non-metal containing) dihydrocarbyl dithiophosphoric acids, and the oils that contain them are new compositions which are useful as lubricant additives. They impart to the lubricant formulations to which they are added low friction and excellent friction retention properties.

Abstract: There is disclosed a lubricating oil for internal combustion engine which comprises:a mineral oil and/or a synthetic lubricating oil as a base oil, and oxymolybdenum dithiocarbamate sulfide expressed by the chemical formula (1): ##STR1## wherein R.sub.1 or R.sub.1 and R.sub.3 denote a branched aliphatic hydrocarbon group having not less than fourteen carbons, and R.sub.2 through R.sub.4 or R.sub.2 and R.sub.4 denote an aliphatic hydrocarbon group having not less than four carbons, in the amount of 0.005 to 0.2% by weight, when calculated as molybdenum (Mo).

Abstract: A method of making an oil-soluble or oil-dispersible trinuclear molybdenum-sulfur compound, comprising: reacting two to less than three equivalents of a tetrahydrocarbyl thiuram disulfide and one equivalent of a compound containing the ?Mo.sub.3 S.sub.13 !.sup.2- ion to produce a trinuclear molybdenum compound of the formula Mo.sub.3 S.sub.x (L).sub.4 wherein x is from 4 to 10 and L is dihydrocarbyl-dithiocarbamate.

Abstract: The invention is a method for enhancing and restoring the friction reduction effectiveness of a lubricating oil comprising adding to the lubricating oil a trinuclear molybdenum sulfur compound selected from the group of trinuclear molybdenum compounds preferably those having the formulas Mo.sub.3 S.sub.7 (dtc).sub.4 and Mo.sub.3 S.sub.4 (dtc).sub.4 and mixtures thereof wherein dtc represents independently selected diorganodithiocarbamate ligands containing independently selected organo groups and wherein the ligands have a sufficient number of carbon atoms among all the organo groups of the compound's ligands are present to render the compound soluble or dispersible in the lubricating oil. The oil may be a fresh or used oil. Concentrates of the composition are also included in the invention.

Abstract: The present invention is directed to a method for improving the performance of a sooted diesel oil and controlling soot induced viscosity increase by adding to a major amount of a diesel oil a minor amount of a composition comprising at least one compound having the formula Mo.sub.3 S.sub.k L.sub.n Q.sub.z and mixtures thereof wherein the L are independently selected ligands having organo groups with a sufficient number of carbon atoms to render the compound soluble or dispersible in the oil, n is from 1 to 4, k varies from 4 through 10, Q is selected from the group of neutral electron donating compounds such as water, amines, alcohols, phosphines, and ethers, and z ranges from 0 to 5 and includes nonstoichiometric values.

Abstract: The invention relates to lube oil compositions containing a major amount of a lube oil and a minor amount of at least one compound containing a heterometallic tetranuclear preferably cubane, more preferably thiocubane core having 1 to 3 molybdenum atoms and the remainder Co, Cr, Cu, Ni, W, Mn, and Fe. Preferred is Cu. Thiocubane cores are also preferred and these typically have the formula M.sub.4-y Mo.sub.y S.sub.4 L.sub.n Q.sub.z, wherein y is 1 to 3, n is 2 to 6 and z is 0 to 4. Additive concentrates of the compounds as well as the method of making the compositions are disclosed.

Abstract: Multifunctional molybdenum compounds, which are the reactive product of molybdenum dithiocarbamates and metal dihydrocarbyl dithiophosphates, are new compositions which are useful as lubricant additives. They impart to the lubricant formulations to which they are added low friction and excellent wear properties at reduced phosphorous concentrations.

Abstract: A lubricating oil composition comprising a base oil, (A) at least one compound selected from the group consisting of molybdenum dithiocarbamate and molybdenum dithiophosphate, and (B) an aromatic compound having at least one functional group selected from the group consisting of hydroxyl group, carboxyl group, mercapto group, and thiocarboxyl group on the aromatic ring. The lubricating oil composition maintains the low friction property to achieve sustained low fuel consumption during the use and also enables using the organic molybdenum compound added as the friction modifier in a smaller amount than the amount required in conventional lubricating oil compositions.

Abstract: The present invention provides novel basic metallic salts of dithiocarbamic acid, in which the content of the basic ingredient (=a.times.3.times.100) is 30-100 mol %, represented by general formula (1): ##STR1## wherein R.sup.1 to R.sup.4, which may be the same or different, are each a lipophilic group having 1-30 carbon atoms, M is a metal atom selected from the group consisting of zinc, copper, nickel, iron, cadmium, silver, lead, antimony, tin, and bismuth, and "a" is a coefficient of 1/3 to 1/10,said basic metallic salts of dithiocarbamic acid containing no phosphorus atoms and imparting low-wear properties when used as an additive for lubricating oils. The present invention also provides lubricating oil compositions containing in a lubricating base oil said basic metal salt of dithiocarbamic acid, which compositions are excellent in wear-resistant properties and frictional characteristics and suitable as a lubricating oil for automotive internal combustion engines.

Abstract: Providing a lubricating oil composition for internal combustion engines which has high resistance to oxidation by nitrogen oxides, excellent friction characteristics that is maintained for a prolonged period, and reduces the fuel consumption for a prolonged period. A lubricating oil composition for internal combustion engines is provided consisting of a base oil principally consisting of a hydrocarbon oil which has a dynamic viscosity of 2-20 mm.sup.2 /s at 100.degree. C. and contains 3 wt % or less aromatic components in total, 45 wt% or more one- and two-ring naphthenes in total, 50 wt ppm or less sulfur and 50 wt ppm or less nitrogen, to which are added, with respect to the total weight of the composition, 0.02-0.2 wt % as molybdenum of molybdenum dithiocarbamate, 0.02-0.15 wt % as phosphorus of zinc dithiophosphate, and 0.05-3 wt % of phenol-based antioxidant.

Abstract: A grease composition for constant velocity joints comprises (a) a base oil; (b) a lithium-containing thickener selected from the group consisting of lithium soap and lithium complex soap; (c) an organic molybdenum compound selected from the group consisting of molybdenum dithiophosphates and molybdenum dithiocarbamates; (d) a zinc dithiophosphate; (e) a sulfur-phosphorus extreme pressure agent free of any metal; and (f) a calcium salt selected from the group consisting of calcium salts of oxidized waxes, calcium salts of petroleum sulfonates and calcium salts of alkyl aromatic sulfonates. The grease composition for constant velocity joints exhibits a substantially improved effect of reducing friction coefficient and a substantially improved effect of reducing the axial force proportional to the third order component of rotation.

Abstract: A lubricating oil composition containing from 0.01 to 0.8% by weight, based on the whole composition, of a phosphoric ester and/or a phosphorous ester, from 50 to 2,000 ppm (in terms of molybdenum) of sulfurized oxymolybdenum dithiocarbamate having at least one hydrocarbyl group having 8 to 18 carbon atoms and from 0.3 to 2.5% by weight of a calcium salicylate having a total base number of 10 to 100.

Abstract: A process for producing molybdenum oxysulfide dithiocarbamate (MoDTC) by reacting [A] an aqueous solution or suspension prepared by reacting (a) a compound having hexavalent molybdenum, with (b) an alkali hydrogensulfide or an alkali sulfide, [B] a carbon disulfide, [C] a secondary amine and [D] a mineral acid, wherein [E] a reducing agent is added and reacted at any stage, and a lubricating oil composition containing the compound obtained according to said process. MoDTC can be efficiently produced in high yields by using a hexavalent molybdenum compound as a starting material, and the produced MoDTC has low corrosive action, excellent wear characteristics and excellent lubricating properties.

Abstract: The present invention is directed to providing a lubricating oil composition which contains an alkyl group asymmetric type molydbdenum dithiocarbamate (MoDTC) as an essential component thereof and which exhibits far more excellent lubrication performance than a conventional lubricating oil composition containing an alkyl group symmetric type MoDTC conventional used in the field of lubricating oils. The lubricating oil composition according to the present invention comprises a base oil for a lubricating oil consisting of a mineral oil and/or a synthetic oil and having a viscosity index of at least 115 and a viscosity at 100.degree. C. falling within the range of 2 to 50 cSt, and a specific alkyl group asymmetric type MoDTC as an essential component.

Abstract: A grease composition comprising 0.1 to 10 parts by weight of a powdered molybdenum oxysulfide dithiocarbamate composition which comprises a compound represented by the following formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independent hydrocarbyl groups and may be the same or different groups, and the total number of carbon atoms contained in R.sup.1 to R.sup.4 is 4 to 36; and wherein X is sulfur or oxygen and the composition of the total of all Xs is given as S.sub.m and O.sub.n in which m and n satisfy the ranges of 1.7.ltoreq.m.ltoreq.3.5 and 0.5.ltoreq.n.ltoreq.2.3, respectively, in which the constituent particles have diameters of not larger than 50 .mu.m, based on 100 parts by weight of a base grease.

Abstract: A grease composition for constant velocity joints which consists essentially of: (a) a base oil; (b) an urea thickener; (c) molybdenum disulfide; and (d) a metal salt or an overbasic metal salt selected from the group consisting of metal salts or overbasic metal salts of oxidized waxes, petroleum sulfonates, alkyl aryl sulfonates, salicylate, and phenates. In addition to (a) to (d), it may further contain, (e) an extreme pressure agent selected from the group consisting of a metal-free sulfur-phosphorus extreme pressure agent and molybdenum dithiophosphate, or (f) molybdenum dithiocarbamate. The grease composition exhibits excellent wear-resistance and pitting-inhibitory effect.