# US 5,707,942 A · Lubricating oil composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,942 A - Document ID: US5707942A - Status: Granted - Kind: A - Application number: 08/680,162 - Filed: 1996-07-15 - Granted: 1998-01-13 - Earliest claimed: 1995-07-20 - Assignees: Tonen Corporation; Toyota Jidosha Kabushiki Kaisha - Inventors: Katsuya Arai; Satoshi Asano; Shigeyuki Yoshizawa; Kenyu Akiyama; Takashi Kikuchi - Web page: https://patentgrep.com/patent/US5707942A ## CPC - C10M 141/12: at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10 - C10M 129/10: having hydroxy groups bound to a carbon atom of a six-membered aromatic ring - C10M 133/56: Amides; Imides - C10M 135/18: thiocarbamic type, e.g. containing the groups [IMAGE cpc-sch-C10M-1027.gif] - C10M 137/00: Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus - C10M 137/10: Thio derivatives - C10M 139/00: Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00 - C10M 145/14: Acrylate; Methacrylate - C10M 159/24: containing sulfonic radicals - C10M 167/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential - C10M 2207/023: having hydroxy groups bound to carbon atoms of six-membered aromatic rings - C10M 2207/026: with tertiary alkyl groups - C10M 2207/027: Neutral salts thereof - C10M 2209/084: Acrylate; Methacrylate - C10M 2215/086: Imides [having hydrocarbon substituents containing less than thirty carbon atoms] - C10M 2215/28: Amides; Imides - C10M 2219/044: Sulfonic acids, Derivatives thereof, e.g. neutral salts - C10M 2219/046: Overbased sulfonic acid salts - C10M 2219/066: Thiocarbamic type compounds - C10M 2219/068: Thiocarbamate metal salts - C10M 2223/00: Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions - C10M 2223/045: Metal containing thio derivatives - C10M 2227/00: Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions - C10M 2227/06: Organic compounds derived from inorganic acids or metal salts - C10M 2227/061: Esters derived from boron - C10M 2227/062: Cyclic esters - C10M 2227/063: Complexes of boron halides - C10M 2227/065: derived from Ti or Zr - C10M 2227/066: derived from Mo or W - C10N 2010/04: Groups 2 or 12 - C10N 2010/12: Groups 6 or 16 - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract A lubricating oil composition comprising a lubricating base oil, an amine salt of molybdic acid, and a molybdenmn dithiocarbamate and/or a molybdenum dithiophosphate, wherein the content of molybdenum derived from the amine salt of molybdic acid is 200 ppm by weight or more, the content of molybdenum derived from the molybdenum dithiocarbamate and/or the molybdenum dithiophosphate is 200 to 700 ppm by weight, and the total content of molybdemum is 400 ppm by weight or more. The lubricating oil composition can maintain the effect to decrease friction in engines for a long time without being affected by nitrogen oxide gases. ## Claims ### Claim 1 A lubricating oil composition comprising: (A) a lubricating base oil having a kinematic viscosity of 3 to 20 mm.sup.2 /s at 100.degree. C., (B) an amine salt of molybdic acid represented by the following formula (1): ##STR18## wherein R represents a hydrocarbon group having 6 to 15 carbon atoms, and (C) at least one molybdenum compound selected from the group consisting of (i) a molybdenum dithiocarbamate represented by the following formula (2): ##STR19## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a hydrocarbon group having 6 to 15 carbon atoms, and X and Y each represent S or O; and (ii) a molybdenum dithiophosphate represented by the following formula (3): ##STR20## wherein R.sup.5, R.sup.6, R.sup.7, and R.sup.8 each represent a hydrocarbon group having 6 to 15 carbon atoms, and X and Y each represent S or O, wherein the content of molybdenum from the amine salt of molybdic acid is 200 to 2,500 ppm by weight, the content of molybdenum from the molybdenum dithiocarbamate and/or the molybdenum dithiophosphate is 200 to 700 ppm by weight, and the total content of molybdenum is 400 to 3,200 ppm by weight. ### Claim 2 (depends on 1) The lubricating oil composition according to claim 1, wherein the lubricating base oil is a hydrogenated oil or a lubricating oil obtained by isomerization of wax, containing 3% by weight or less of aromatic fractions and no more than 50 ppm by weight sulfur. ### Claim 3 (depends on 1) The lubricating oil composition according to claim 1, wherein the content of molybdenum from the amine salt of molybdic acid is 400 to 2,000 ppm by weight and the total content of molybdenum is 600 to 2,700 ppm by weight. ### Claim 4 (depends on 1) The lubricating oil composition according to claim 1, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the formula (2) each represent a hydrocarbon group having 8 to 13 carbon atoms, and R.sup.5, R.sup.6, R.sup.7, and R.sup.8 in the formula (3) each represent a hydrocarbon group having 8 to 13 carbon atoms. ### Claim 5 (depends on 1) The lubricating oil composition according to claim 1, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the formula (2) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group, and R.sup.5, R.sup.6, R.sup.7, and R.sup.8 in the formula (3) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group. ### Claim 6 (depends on 3) The lubricating oil composition according to claim 3, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the formula (2) each represent a hydrocarbon group having 8 to 13 carbon atoms, and R.sup.5, R.sup.6, R.sup.7, and R.sup.8 in the formula (3) each represent a hydrocarbon group having 8 to 13 carbon atoms. ### Claim 7 (depends on 4) The lubricating oil composition according to claim 4, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the formula (2) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group, and R.sup.5, R.sup.6, R.sup.7, and R.sup.8 in the formula (3) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group. ### Claim 8 (depends on 6) The lubricating oil composition according to claim 6, wherein in the formula (2), R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group, X represents O, and Y represents S; and in the formula (3), R.sup.5, R.sup.6, R.sup.7, and R.sup.8 each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group, X represents O, and Y represents S. ### Claim 9 (depends on 4) The lubricating oil composition according to claim 4, wherein R in the formula (1) represents a hydrocarbon group having 10 to 13 carbon atoms. ### Claim 10 (depends on 6) The lubricating oil composition according to claim 6, wherein R in the formula (1) represents a hydrocarbon group having 10 to 13 carbon atoms. ### Claim 11 (depends on 9) The lubricating oil composition according to claim 9, wherein R in the formula (1) represents an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group. ### Claim 12 (depends on 10) The lubricating oil composition according to claim 10, wherein R in the formula (1) represents an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group. ### Claim 13 (depends on 7) The lubricating oil composition according to claim 7, wherein R in the formula (1) represents an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group having 10 to 13 carbon atoms. ### Claim 14 (depends on 8) The lubricating oil composition according to claim 8, wherein R in the formula (1) represents an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group having 10 to 13 carbon atoms. ### Claim 15 A lubricating oil composition comprising: (A) a lubricating base oil having a kinematic viscosity of 3 to 20 mm.sup.2 /s at 100.degree. C., (B) an amine salt of molybdic acid represented by the following formula (1): ##STR21## wherein R represents a hydrocarbon group having 6 to 15 carbon atoms, (C) is at least one molybdenum compound selected from the group consisting of (i) a molybdenum dithiocarbamate represented by the following formula (2): ##STR22## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represent a hydrocarbon group having 6 to 15 carbon atoms, and X and Y each represent S or O and (ii) a molybdenum dithiophosphate represented by the following formula (3): ##STR23## wherein R.sup.5, R.sup.6, R.sup.7, and R.sup.8 each represent a hydrocarbon group having 6 to 15 carbon atoms, and X and Y each represent S or O, wherein the content of molybdenum from the amine salt of molybdic acid is 200 to 2500 ppm by weight, the content of molybdenum from the molybdenum dithiocarbamate and/or the molybdenum dithiophosphate is 200 to 700 ppm by weight, the total content of molybdenum is 400 to 3,200 ppm by weight, and (D) at least one additive selected from the group consisting of a metallic detergent, an ashless dispersant, an antioxidant, an antiwear agent and a viscosity index improver. ### Claim 16 (depends on 15) The lubricating oil composition according to claim 15, wherein the content of molybdenum from the amine salt of molybdic acid is 400 to 2,000 ppm by weight and the total content of molybdenum is 600 to 2,700 ppm by weight. ### Claim 17 (depends on 16) The lubricating oil composition according to claim 16, wherein R in the formula (1) represents an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group having 10 to 13 carbon atoms; R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the formula (2) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group having 10 to 13 carbon atoms, and R.sup.5, R.sup.6, R.sup.7, and R.sup.8 in the formula (3) each represent an alkyl, an alkenyl, a cycloalkyl, an aryl, an alkylaryl or an arylalkyl group having 10 to 13 carbon atoms. ### Claim 18 (depends on 1) The lubricating oil composition claimed in claim 1, wherein the lubricating oil is selected from the group consisting of 60 neutral oil, 100 neutral oil, 150 neutral oil, 300 neutral oil, 500 neutral oil, bright stock, poly-.alpha.-olefin oligomers, polybutenes, alkylbenzenes, polyol esters, polyglycol esters, esters of dibasic acids, esters of phosphoric acid and silicone oils. ### Claim 19 (depends on 15) The lubricating oil composition claimed in claim 15, wherein the at least one additive is selected from the group consisting of (i) 0.1 to 5% by weight of a metallic detergent selected from the group consisting of a calcium salicylate, a magnesium salicylate, a calcium sulfonate, a magnesium sulfonate, a barium sulfonate, a calcium phenate and a barium phenate, (ii) 0.05 to 5% by weight of an antiwear agent which is a metal salt of a compound selected from the group consisting of thiophosphoric acid, a sulfur compound, an ester of phosphoric acid and an ester of phosphorous acid, (iii) 0.5 to 7% by weight of ashless dispersant selected from the group consisting of a succinimide, a succinamide, a benzylamine and an ester, (iv) 0.05 to 4% by weight of an antioxidant selected from the group consisting of an alkylated diphenylamine, a phenyl-.alpha.-naphthylamine, an alkylated .alpha.-naphthylamine, 2,6-di-t-butyl-4-methylphenol and 4,4'-methylene bis (2,6-di-t-butyl phenol), and (v) 0.5 to 35% by weight of a viscosity index improver selected from the group consisting of a polymethacrylate, a polyisobutylene, an ethylene-propylene copolymer and a hydrogenated styrene-butadiene copolymer.