Abstract: The present invention provides a compound represented by formula (1) (in formula (1), R1 and R2 each independently represent a group represented by formula (2) or NHR0 (where R1 and R2 are not simultaneously NHR0), R0 represents any one of hydrogen, an alkyl group having 1-20 carbon atoms, an alkenyl group having 2-30 carbon atoms, an aryl group having 6-30 carbon atoms, an alkylaryl group having 7-30 carbon atoms, and an arylalkyl group having 7-30 carbon atoms, each R3 independently represents hydrogen or a hydrocarbon group having 1-30 carbon atoms, l represents an integer of 0-4, m represents an integer of 1-4 (where m is an integer of 2-4 in the case where R1 and R2 are a group represented by formula (2)), and each n independently represents an integer of 0-4, and, in formula (2), R4 represents a hydrocarbon group having 6-24 carbon atoms, and X1 and X2 each independently represent an oxygen atom or a sulfur atom).

Abstract: The present invention provides a compound represented by formula (1) (in formula (1), R1 and R2 each independently represent a group represented by formula (2) or NHR0 (where R1 and R2 are not simultaneously NHR0), R0 represents any one of hydrogen, an alkyl group having 1-20 carbon atoms, an alkenyl group having 2-30 carbon atoms, an aryl group having 6-30 carbon atoms, an alkylaryl group having 7-30 carbon atoms, and an arylalkyl group having 7-30 carbon atoms, each R3 independently represents hydrogen or a hydrocarbon group having 1-30 carbon atoms, l represents an integer of 0-4, m represents an integer of 1-4 (where m is an integer of 2-4 in the case where R1 and R2 are a group represented by formula (2)), and each n independently represents an integer of 0-4, and, in formula (2), R4 represents a hydrocarbon group having 6-24 carbon atoms, and X1 and X2 each independently represent an oxygen atom or a sulfur atom).

Abstract: Provided are a lubricating oil composition excellent in anti-seizing properties and ant-wear properties, containing a base oil containing at least a mineral oil and a sulfur- and phosphorus-containing anti-wear agent, a mass ratio (S/P ratio) of a sulfur atom and a phosphorus atom contained in the composition being 7.5 or more and 16 or less; and a lubrication method and a gear each using the same.

Abstract: Provided are a lubricating oil composition for internal combustion engine capable of preventing a deterioration of the combustion state of a spark-ignition internal combustion engine, specifically, a lubricating oil composition to be used for a spark-ignition internal combustion engine in which a total tension per piston of tensions applied to the piston ring is 100 N or less, the lubricating oil composition being a lubricating oil composition including a base oil, (A) a calcium-based detergent, at least one selected from (B1) a sodium-based additive and (B2) a magnesium-based additive, and (C) an ash-free sulfur-based additive in predetermined contents; a method for producing the lubricating oil composition; a spark-ignition internal combustion engine using the lubricating oil composition; and a method for lubricating the internal combustion engine.

Abstract: A lubricating oil composition of the present invention for an internal combustion engine is prepared by blending (A) a perbasic calcium sulfonate and/or a perbasic calcium phenate having a TBN of 200 mgKOH/g or higher, (B) predetermined binuclear and/or trinuclear organic molybdenum compounds, and (C) a polyalkyl (meth)acrylate having an SSI of 30 or lower into a lubricating base oil composed of a mineral oil and/or a synthetic oil, in which the total content of molybdenum derived from the binuclear and trinuclear organic molybdenum compounds is 0.025% by mass or higher based on the total amount of the composition, and in which the lubricating oil composition has a high-temperature high-shear viscosity at 100° C. of 4.0 to 5.0 mPa·s, a high-temperature high-shear viscosity at 150° C. of 2.5 mPa·s or lower and a NOACK value (250° C., 1 hr) of 15% by mass or less.

Abstract: The lubricating oil composition for spark-ignition internal combustion engine according to the present invention is a lubricating oil composition to be used for a spark-ignition internal combustion engine including a piston having a piston ring, in which a total tension per piston of tensions applied to the piston ring is 30 N or less, the lubricating oil composition being a lubricating oil composition comprising a base oil, (A) an organic metal-based additive containing an alkali metal and/or an alkaline earth metal, and (B) an organic zinc-based additive, wherein a concentration of the component (A) on a basis of the total amount of the lubricating oil composition is 0.15% by mass or less as converted into a metal content; a concentration of the component (B) on a basis of the total amount of the lubricating oil composition is 0.

Abstract: A lubricant oil composition which is excellent in deposition resistance, corrosion resistance and wear resistance, despite its low phosphorus content and low sulfuric acid ash content, is provided by using a succinimide compound in combination with at least one selected from specific sulfur-containing compounds, specific heterocyclic compounds and reaction products thereof.

Abstract: The lubricating oil composition of the present invention comprises a base oil that contains at least one selected from the group consisting of a mineral oil and a synthetic oil, has a viscosity index of 120 or more, and has a paraffin content by ring analysis of 70% or more; (A) a dispersant containing one or more compounds selected from the group consisting of an alkenylsuccinimide, a boronated alkenylsuccinimide, an alkylsuccinimide and a boronated alkylsuccinimide; and (B) a metallic detergent containing one or more compounds selected from the group consisting of an alkali metal sulfonate, an alkali metal phenate, an alkali metal salicylate, an alkaline earth metal sulfonate, an alkaline earth metal phenate, and an alkaline earth metal salicylate; wherein the component (A) is contained in an amount of from 0.01% by mass to 0.10% by mass in terms of the nitrogen content thereof based on the total amount of the composition, the component (B) is contained in an amount of from 0.01% by mass to 0.

Abstract: The lubricating oil composition of the present invention comprises a base oil that contains at least one selected from the group consisting of a mineral oil and a synthetic oil, has a viscosity index of 120 or more, and has a paraffin content by ring analysis of 70% or more; a dispersant (A) containing one or more compounds selected from the group consisting of an alkenylsuccinimide, a boronated alkenylsuccinimide, an alkylsuccinimide and a boronated alkylsuccinimide; and a molybdenum dithiocarbamate (B); wherein the component (A) is contained in an amount of from 0.01% by mass to 0.10% by mass in terms of the nitrogen content thereof based on the total amount of the composition, one or more compounds selected from the group consisting of a boronated alkenylsuccinimide and a boronated alkylsuccinimide in the component (A) are contained in an amount of from 0.05% by mass to 3.

Abstract: A lubricating oil composition of the invention contains: a lubricating base oil; a component (A) that is a polymethacrylate having a mass average molecular weight in a range from 30,000 to 600,000; and a component (B) that is an olefin copolymer having a 95% weight-loss temperature of 500 degrees C. or less as calculated by differential thermal analysis and having 40 or less of SSI (Shear Stability Index).

Abstract: A lubricating oil composition of the present invention for an internal combustion engine is prepared by blending (A) a perbasic calcium sulfonate and/or a perbasic calcium phenate having a TBN of 200 mgKOH/g or higher, (B) predetermined binuclear and/or trinuclear organic molybdenum compounds, and (C) a polyalkyl (meth)acrylate having an SSI of 30 or lower into a lubricating base oil composed of a mineral oil and/or a synthetic oil, in which the total content of molybdenum derived from the binuclear and trinuclear organic molybdenum compounds is 0.025% by mass or higher based on the total amount of the composition, and in which the lubricating oil composition has a high-temperature high-shear viscosity at 100° C. of 4.0 to 5.0 mPa·s, a high-temperature high-shear viscosity at 150° C. of 2.5 mPa·s or lower and a NOACK value (250° C., 1 hr) of 15% by mass or less.

Abstract: Provided are an anti-wear agent comprising a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes and/or comprising a reaction product of the heterocyclic compound and a compound selected from a boron compound, a molybdenum compound, and a silicon compound, which is an anti-wear agent for a lubricating oil excellent in wear resistance, friction-reducing property, and base number-retaining property, and a lubricating oil composition comprising the anti-wear agent.

Abstract: Provided is an additive for lubricating oils which enhances frictional characteristics of slide parts in internal combustion engines and driving system transmission engines and which exhibit an excellent fuel consumption reducing effect. The above additive for lubricating oils comprises a heterocyclic compound having a heterocyclic skeleton originating in a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, indazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans and thiophenes. A lubricating oil composition containing the above additive for lubricating oils is effectively used for various low friction slide members, antifriction bearings and slide bearings.

Abstract: The present invention provides a lubricating oil composition capable of achieving a lubricating property, a thermal stability, an oxidation stability, an anti-discoloring property and an anti-varnishing performance with a higher level by compounding a phosphorus compound having a specific structure in a base oil, as well as a lubricating oil composition for internal combustion engines which is excellent in wear resistance, high-temperature detergency and base number retention property although it has a low phosphorus content, a low sulfur content and a low sulfated ash content.

Abstract: Provided is a lubricating oil composition of an environmental regulation compliant type, comprising (A) a base oil for a lubricating oil, (B) sulfated oxymolybdenum dithiocarbamate, (C) an acid amide compound, (D) (d1) a fatty acid partial ester compound and/or (d2) an aliphatic amine compound and (E) a specific benzotriazole derivative, wherein a content of the component (B) is 0.02 to 0.1% by mass in terms of molybdenum; a content of the component (C) is 0.2 to 1.0 % by mass; a content of the component (D) is 0.2 to 1.0% by mass; and a content of the component (E) is 0.02 to 0.1% by mass each based on the whole amount of the composition, and it has an excellent friction reducing effect in combination with a high corrosion preventing effect to copper and lead.

Abstract: A lubricating oil composition used in an internal combustion engine is provided. The internal combusting engine uses a fuel that contains at least one fat and oil selected from a group consisting of natural fat and oil, hydrotreated natural fat and oil, transesterified natural fat, and oil and hydrotreated transesterified natural fat and oil. The lubricating oil composition includes: base oil of lubricating oil; a component (A) containing a boron derivative of an alkyl or alkenyl-substituted succinimide compound having a number average molecular weight of 200 to 5000; and a component (B) containing an alkaline earth metal-based detergent. The component (A) is contained by 0.01 to 0.2 mass % in terms of boron of a total amount of the composition while the component (B) is contained by 0.35 mass % or less in terms of the alkaline earth metal of the total amount of the composition.

Abstract: A lubricant oil composition which is excellent in deposition resistance, corrosion resistance and wear resistance, despite its low phosphorus content and low sulfuric acid ash content, is provided by using a succinimide compound in combination with at least one selected from specific sulfur-containing compounds, specific heterocyclic compounds and reaction products thereof.

Abstract: A lubricating oil composition according to the present invention is used in an internal combustion engine. The internal combustion engine uses a fuel that contains at least one fat and oil selected from a group consisting of natural fat and oil, hydrotreated natural fat and oil, transesterified natural fat and oil and hydrotreated transesterified natural fat and oil. The lubricating oil composition contains a component (A) that is an alkaline earth metal-based detergent. The component (A) is contained by a content of more than 0.35 mass % and 2 mass % or less of the total amount of the composition in terms of alkaline earth metal.

Abstract: A lubricating oil composition for internal combustion engines, containing a base oil, (A) at least one compound selected from disulfide compounds represented by the following general formula (I): R1OOC-A1-S—S-A2-COOR2??(I) and disulfide compounds represented by the following general formula (II): R7OOC—CR9R10—CR11(COOR8)—S—S—CR16(COOR13)—CR14R15—COOR12??(II), (B) an organomolybdenum compound, and (C) a phenol-based antioxidant and/or an amine-based antioxidant. The lubricating oil composition is a low ash, low phosphorus lubricating oil composition which is used for internal combustion engines such as gasoline engines, diesel engines and gas engines, which has improved oxidation stability and friction reducing effect, and which complies with environmental regulations.

Abstract: A lubricating oil composition which is excellent in wear resistance, despite its low phosphorus content, low sulfur content and low sulfuric acid ash content, and which exhibits excellent friction reducing effect even when used for a DLC-treated sliding part, is provided by compounding a specific sulfur-containing compound and a specific polar group-containing compound in a base oil.