Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
  • C10M135/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
  • C10M135/10—Sulfonic acids or derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
  • C10M159/12—Reaction products
  • C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
  • C10M159/24—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/04—Groups 2 or 12
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal

Definitions

• the present invention relates to lubricating oil compositions.
• Sintered parts are widely used, mainly for automobile parts and machine parts, because they can mass-produce parts with complex shapes with high precision, and high-performance materials can be obtained by combining composite materials.
• Such a sintered member is generally manufactured through a compaction process, a sintering process, a sizing press process, and a grinding process.
• various lubricating oil compositions are usually used in order to improve workability.
• Patent Document 1 a base oil, a thiadiazole-based compound that is an anti-tarnishing agent, and a phenol-based compound and/or an amine-based compound that is an anti-sticking agent are contained, and 100 parts by weight of the base oil contains synthetic ester and/or a sizing oil agent containing 20 to 100 parts by weight of oil.
• the oil for sizing processing is said to be excellent in workability, and to be able to suppress the stickiness of the surface of the sintered member after processing and the discoloration of the surface of the component after surface treatment.
• the present invention provides a lubricating oil composition containing a base oil having a predetermined initial boiling point and kinematic viscosity, and a metal-based sulfonate, and adjusting the kinematic viscosity to a specific range.
• the present invention provides, for example, the following aspects [1] to [13].
• the lubricating oil composition has a conductivity of 10,000 to 200,000 pS/m, A lubricating oil composition for use in sizing press processing.
• Component (B) is an overbased calcium sulfonate (B1) with a base value of 100 mgKOH/g or more, an overbased sodium sulfonate (B2) with a base value of 100 mgKOH/g or more, and sodium with a base value of less than 100 mgKOH/g.
• the total content of component (B1), component (B2), and component (B3) is 50 to 100% by mass based on the total amount of component (B) contained in the lubricating oil composition.
• [5] The lubricating oil composition according to any one of [1] to [4] above, wherein component (B) contains at least an overbased calcium sulfonate (B1) having a base value of 100 mgKOH/g or more.
• a method of using the lubricating oil composition according to any one of [1] to [10] above for sizing press working of a sintered member comprising applying the lubricating oil composition according to any one of [1] to [10] above and subjecting the sintered member to sizing press working.
• the lubricating oil composition of a preferred embodiment of the present invention is excellent in various performances (for example, low VOC properties, workability, electrostatic oil application, and rust prevention), so it is suitable for sizing press processing. It can be an oil composition.
• the upper and lower limits can be combined arbitrarily.
• the numerical range is described as “preferably 30 to 100, more preferably 40 to 80”
• the range of "30 to 80” and the range of "40 to 100” are also described in this specification. included in the specified numerical range.
• the numerical range is described as “preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less”
• “30 to 80” Ranges and ranges from “40 to 100” are also included in the numerical ranges described herein.
• “60 to 100” means a range of "60 or more and 100 or less”.
• the lubricating oil composition of the present invention comprises a base oil (A) having an initial boiling point of 300° C. or higher and a kinematic viscosity at 40° C. of 15.0 mm 2 /s or lower, and a metal sulfonate (B) (hereinafter referred to as Also referred to as “component (B)”), the lubricating oil composition is adjusted to have a conductivity of 10,000 to 200,000 pS/m.
• component (B) also referred to as “component (B)
• the lubricating oil composition of the present invention has the base oil (A) and the metal sulfonate (B) as described above, and the electrical conductivity is adjusted to the above range. organic compound), it can be a lubricating oil composition excellent in properties such as workability, electrostatic oil application, and rust prevention.
• the electrical conductivity of the lubricating oil composition of one embodiment of the present invention is 10,000 pS/m or more, preferably 12,000 pS/m or more, from the viewpoint of making the lubricating oil composition excellent in electrostatic oil applicability. More preferably 13,000 pS/m or more, more preferably 14,000 pS/m or more, still more preferably 15,000 pS/m or more, still more preferably 16,000 pS/m or more, still more preferably 17,000 pS/m or more , particularly preferably 18,000 pS/m or more, furthermore, 20,000 pS/m or more, 22,000 pS/m or more, 24,000 pS/m or more, 25,000 pS/m or more, 27,000 pS/m or more, It may be 28,000 pS/m or more, 29,000 pS/m or more, or 30,000 pS/m or more.
• the electrical conductivity of a lubricating oil composition means a value measured according to JIS K2276.
• the type and various properties of the base oil (A) and the metal sulfonate (B) are adjusted to adjust the conductivity within the above range.
• the conductivity of the lubricating oil composition is adjusted to the above range. It is possible.
• the metal-based sulfonate (B) by appropriately setting the type, base number, and content (metal content) of the metal constituting the metal-based sulfonate, the conductivity of the lubricating oil composition can be adjusted to the above It is possible to adjust the range. Specifically, it is possible to adjust the conductivity of the lubricating oil composition to the above range by referring to the descriptions of the items of "base oil (A)" and "metallic sulfonate (B)” described later. be.
• the lubricating oil composition of one aspect of the present invention may contain additives other than components (A) and (B) within a range that does not impair the effects of the present invention.
• the total content of components (A) and (B) is based on the total amount (100% by mass) of the lubricating oil composition, preferably 50% by mass or more, more preferably is 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 85% by mass or more, even more preferably 90% by mass or more, particularly preferably 95% by mass or more, and , 100% by mass or less, 99% by mass or less, 98% by mass or less, 97% by mass or less, or 96% by mass or less.
• Each component contained in the lubricating oil composition of one embodiment of the present invention will be described below.
• the base oil (A) used in one aspect of the present invention is a base oil having an initial boiling point of 300° C. or higher and a kinematic viscosity at 40° C. of 15.0 mm 2 /s or lower.
• a base oil having an initial boiling point of 300°C or higher a lubricating oil composition excellent in low VOC properties can be obtained.
• a base oil having a kinematic viscosity at 40 ° C. of 15.0 mm 2 / s or less it is easy to adjust the conductivity of the lubricating oil composition to the above range, and the lubricating oil composition excellent in electrostatic oil applicability. can be Further, by using a base oil having an initial boiling point and a kinematic viscosity at 40°C within the above ranges, a lubricating oil composition with improved rust prevention can be obtained.
• the initial boiling point of the base oil (A) used in one aspect of the present invention is 300° C. or higher, but is preferably 305° C. or higher from the viewpoint of obtaining a lubricating oil composition having excellent low VOC properties and rust prevention properties. More preferably 310 ° C. or higher, still more preferably 315 ° C. or higher, still more preferably 320 ° C. or higher, particularly preferably 322 ° C. or higher. From the viewpoint of a lubricating oil composition, the temperature is preferably 380°C or lower, more preferably 370°C or lower, still more preferably 360°C or lower, still more preferably 350°C or lower, and particularly preferably 340°C or lower.
• the final boiling point of the base oil (A) used in one aspect of the present invention is preferably 340° C. or higher, more preferably 350° C., from the viewpoint of obtaining a lubricating oil composition excellent in low VOC properties and rust prevention properties.
• an initial boiling point and a final boiling point mean the value measured based on JISK2254.
• the initial boiling point and final boiling point of the mixed oil are preferably within the above ranges. .
• a base oil with a low initial boiling point and a low final boiling point and a base oil with a high initial boiling point and a high final boiling point are used together to prepare a mixed oil having an initial boiling point and a final boiling point in the above range.
• the kinematic viscosity at 40° C. of the base oil (A) used in one aspect of the present invention is 15.0 mm 2 /s or less, but the electrical conductivity is adjusted to the range described above, and the electrostatic oil coating property is excellent.
• a lubricating oil composition with improved properties it is preferably 13.5 mm 2 /s or less, more preferably 12.0 mm 2 /s or less, even more preferably 11.0 mm 2 /s or less, and even more preferably is 10.5 mm 2 /s or less, particularly preferably 10.0 mm 2 /s or less, further 9.50 mm 2 /s or less, 9.00 mm 2 /s or less, 8.50 mm 2 /s or less, or 8 00 mm 2 /s or less, and from the same viewpoint as above, it is preferably 2.00 mm 2 /s or more, more preferably 2.50 mm 2 /s or more, and still more preferably 3.00 mm 2 /s or more.
• mm 2 /s or more more preferably 3.50 mm 2 /s or more, particularly preferably 4.00 mm 2 /s or more, and further preferably 4.50 mm 2 /s or more, 5.00 mm 2 /s or more, 5.50 mm 2 / s Above, it may be 6.00 mm 2 /s or more, 6.50 mm 2 /s or more, or 7.00 mm 2 /s or more.
• the viscosity index of the base oil (A) used in one aspect of the present invention is preferably 60 or higher, more preferably 70 or higher, even more preferably 80 or higher, still more preferably 90 or higher, and particularly preferably 100 or higher.
• a kinematic viscosity and a viscosity index mean the value measured and calculated based on JISK2283:2000.
• the kinematic viscosity and viscosity index of the mixed oil are preferably within the above ranges. Therefore, a low-viscosity base oil and a high-viscosity base oil may be used together to prepare the mixed oil so that the kinematic viscosity and the viscosity index are within the above ranges.
• the content of the base oil (A) is preferably 40% by mass or more, more preferably 50% by mass, based on the total amount (100% by mass) of the lubricating oil composition.
• the base oil (A) used in one aspect of the present invention includes one or more selected from mineral oils and synthetic oils.
• Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; distillates obtained by vacuum distillation of these atmospheric residual oils. refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining (hydrocracking); etc.
• Synthetic oils include, for example, ⁇ -olefin homopolymers, or ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
• Synthetic oil (GTL) obtained by isomerizing the manufactured wax (GTL wax (Gas To Liquids WAX)) and the like can be mentioned.
• the base oil (A) used in one embodiment of the present invention is a mixture of a fatty acid and an aliphatic alcohol, from the viewpoint of adjusting the conductivity to the above range and making a lubricating oil composition excellent in electrostatic oil application properties. It is preferably a base oil containing the ester (A1) of, more preferably a mixed base oil containing the component (A1) and another base oil (A2) other than the component (A1).
• the initial boiling points of the components (A1) and (A2) , final boiling point, kinematic viscosity, and viscosity index may or may not belong to the above ranges.
• the initial boiling point, final boiling point, kinematic viscosity, and The viscosity index preferably belongs to the above range, and the initial boiling point, final boiling point, kinematic viscosity, and viscosity index of both components (A1) and (A2) belong to the above range. good.
• the component (A) used in one aspect of the present invention contains the components (A1) and (A2), at least one of the component (A1) and the component (A2) has an initial boiling point of 300°C or higher.
• 40° C. is preferably 15.0 mm 2 /s or less.
• the component (A1) may have an initial boiling point of 300° C. or higher and a kinematic viscosity at 40° C. of 15.0 mm 2 /s or lower
• the component (A2) may have an initial boiling point of It may be 300° C. or higher and may have a kinematic viscosity at 40° C. of 15.0 mm 2 /s or lower.
• the component (A) used in one aspect of the present invention contains the components (A1) and (A2), both the component (A1) and the component (A2) have an initial boiling point of 300° C. or higher
• the kinematic viscosity at 40°C is preferably 15.0 mm 2 /s or less.
• the component (A1) and the component (A2) of the mixed base oil are used as the base oil (A)
• the component (A1) and the component (A2) of the mixed base oil are preferably 5/95 in mass ratio from the viewpoint of adjusting the conductivity to the above range and making the lubricating oil composition excellent in electrostatic oil application.
• preferably 10/90 or more more preferably 15/85 or more, still more preferably 20/80 or more, still more preferably 25/75 or more, particularly preferably 30/70 or more, and preferably 90 /10 or less, more preferably 85/15 or less, more preferably 80/20 or less, still more preferably 75/25 or less, even more preferably 70/30 or less, particularly preferably 65/35 or less.
• Component (A1) Ester of fatty acid and fatty alcohol>>
• the fatty acid constituting the component (A1) has 6 to 26 carbon atoms (preferably 8 to 24, more preferably 8 to 24, more preferably is 10 to 22, more preferably 12 to 20).
• the fatty acid may be a saturated fatty acid or an unsaturated fatty acid, but is preferably a saturated fatty acid from the viewpoint of preventing deterioration of the oil agent derived from the unsaturated fatty acid during long-term storage.
• saturated fatty acids examples include hexanoic acid (caproic acid), heptanoic acid (enanthic acid), octanoic acid (caprylic acid), nonanoic acid (pelargonic acid), decanoic acid (capric acid), undecanoic acid, dodecanoic acid (lauric acid), ), tridecanoic acid, tetradecanoic acid (myristic acid), pentadecanoic acid (pentadecyl acid), hexadecanoic acid (palmitic acid), heptadecanoic acid (margaric acid), octadecanoic acid (stearic acid), isostearic acid, nonadecanic acid, eicosanoic acid (arachidin acid), monovalent saturated fatty acids such as docosanoic acid (behenic acid), and the like.
• Unsaturated fatty acids include monounsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolenic acid, eleostearic acid, ricinoleic acid, mead acid, arachidonic acid, erucic acid, and nervonic acid. etc.
• Component (A1) may be composed of one kind of fatty acid, or may be composed of two or more kinds of fatty acids.
• the aliphatic alcohol that constitutes the component (A1) may be either an aliphatic monoalcohol or an aliphatic polyhydric alcohol.
• the fatty alcohol may be a straight chain fatty alcohol or a branched chain fatty alcohol.
• the number of carbon atoms in the aliphatic alcohol is preferably 6-24, more preferably 8-20, still more preferably 10-18, still more preferably 12-15.
• aliphatic monoalcohols examples include 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, 1-decanol, 1-undecanol, 1-dodecanol, 1-tridecanol, 1-tetradecanol, 1-penta Linear aliphatic saturated monoalcohols such as decanol, 1-hexadecanol, 1-octadecanol, 1-nonadecanol, 1-eicosanol; ethylhexanol, butyloctanol, pentylnonanol, hexyldecanol, heptylundecanol, octyl Branched chain aliphatic saturated monoalcohols such as dodecanol, methylheptadecanol, isotridecanol; , Linear aliphatic unsaturated monoalcohols such as eicosen
• aliphatic polyhydric alcohols examples include diols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol and neopentyl glycol; triols such as glycerin, trimethylolethane and trimethylolpropane; pentaols such as sorbitol; and the like.
• Component (A1) may consist of one type of fatty alcohol, or may consist of two or more types of fatty alcohols.
• the aliphatic alcohol constituting component (A1) is preferably an aliphatic monoalcohol, more preferably a linear aliphatic monoalcohol.
• the straight-chain aliphatic monoalcohol preferably has 6 to 24 carbon atoms, more preferably 8 to 20 carbon atoms, still more preferably 10 to 18 carbon atoms, and even more preferably 12 to 15 carbon atoms.
• the ester (A1) is obtained by the dehydration reaction between the fatty acid and the fatty alcohol, but not limited to the dehydration reaction between the fatty acid and the fatty alcohol, transesterification may be used.
• the component (A1) used in one embodiment of the present invention is an ester of a fatty acid and a linear aliphatic monoalcohol. It is preferable to have a saturated fatty acid or unsaturated fatty acid having 6 to 26 carbon atoms (preferably 8 to 24, more preferably 10 to 22, more preferably 12 to 20) and a carbon number of 6 to 24 (preferably 8 to 20, more preferably 10 to 18, and even more preferably 12 to 15) with a straight-chain aliphatic monoalcohol. More preferred are esters with linear aliphatic monoalcohols.
• Component (A2) used in one aspect of the present invention includes one or more base oils selected from the mineral oils and synthetic oils described above, which do not correspond to component (A1).
• the component (A2) used in one embodiment of the present invention is an API (American Petroleum Institute) base oil from the viewpoint of adjusting the conductivity to the above range and making a lubricating oil composition excellent in electrostatic oil application properties It preferably contains one or more selected from mineral oils classified in category Group II and Group III, and synthetic oils, and mineral oils classified in Group II and Group III, and GTL wax (Gas To Liquids WAX) It is more preferable to contain one or more selected from synthetic oils (GTL) obtained by isomerizing.
• API American Petroleum Institute
• Metal sulfonate Metal sulfonate>
• the metal-based sulfonate (B) used in one aspect of the present invention include calcium sulfonate, magnesium sulfonate, barium sulfonate, sodium sulfonate, etc., and the lubricating oil composition having the conductivity adjusted to the range described above. It is preferred that the base number and metal atom are selected as follows. In one aspect of the present invention, the metal sulfonate (B) may be used alone or in combination of two or more.
• the specific metal sulfonate (B) used in one embodiment of the present invention has a base value of 100 mgKOH/g or more.
• the metal-based sulfonate (B) used in one embodiment of the present invention is one or more selected from component (B1) and component (B2). It is more preferable to include
• the total content of components (B1) and (B2) in component (B) is the total amount of component (B) contained in the lubricating oil composition (100 mass% ), preferably 20% by mass or more, more preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, still more preferably 70% by mass % or more, particularly preferably 80 mass % or more, and may be 85 mass % or more, 90 mass % or more, 95 mass % or more, or 98 mass % or more.
• the total content of the component (B1) in the component (B) is the total amount (100% by mass) of the component (B) contained in the lubricating oil composition.
• preferably 10% by mass or more, more preferably 20% by mass or more, more preferably 30% by mass or more, still more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more is particularly preferably 70% by mass or more, and may be 75% by mass or more, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, or 98% by mass or more.
• the base number of the component (B1) is 100 mgKOH/g or more, but from the viewpoint of adjusting the conductivity to the above range and making the lubricating oil composition more excellent in electrostatic oil application, it is preferably 150 mgKOH/g or more, more preferably 200 mgKOH/g or more, more preferably 250 mgKOH/g or more, still more preferably 300 mgKOH/g or more, still more preferably 350 mgKOH/g or more, even more preferably 400 mgKOH/g or more, particularly preferably 500 mgKOH/g or more, Moreover, it is good also as 800 mgKOH/g or less, 750 mgKOH/g or less, 700 mgKOH/g or less, 650 mgKOH/g or less, or 600 mgKOH/g or less.
• the base number of component (B2) is 100 mgKOH/g or more, but from the viewpoint of adjusting the conductivity to the above range and making the lubricating oil composition more excellent in electrostatic oil applicability, it is preferably 120 mgKOH/g or more, more preferably 150 mgKOH/g or more, more preferably 200 mgKOH/g or more, still more preferably 250 mgKOH/g or more, still more preferably 300 mgKOH/g or more, even more preferably 350 mgKOH/g or more, particularly preferably 400 mgKOH/g or more, Moreover, it is good also as 800 mgKOH/g or less, 750 mgKOH/g or less, 700 mgKOH/g or less, 650 mgKOH/g or less, or 600 mgKOH/g or less.
• the base number of component (B3) may be less than 100 mgKOH/g, less than 90 mgKOH/g, less than 80 mgKOH/g, less than 70 mgKOH/g, less than 60 mgKOH/g, less than 50 mgKOH/g, less than 40 mgKOH/g, 30 mgKOH/g. g or less than 20 mgKOH/g, and may be 0 mgKOH/g or more, 1 mgKOH/g or more, 5 mgKOH/g or more, or 10 mgKOH/g or more.
• the base number is defined as 7. of JIS K2501:2003 "Petroleum products and lubricating oils-neutralization number test method". Means the base number by the hydrochloric acid method measured in accordance with.
• component (B) other metal-based sulfonates other than the above-described components (B1) to (B3) may be contained, but the conductivity is within the above range. From the viewpoint of obtaining a lubricating oil composition having excellent electrostatic oil applicability by adjustment, it is preferable that the total content of components (B1) to (B3) in component (B) is as large as possible.
• the total content of component (B1), component (B2), and component (B3) is based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition, preferably 50 ⁇ 100 mass%, more preferably 60 to 100 mass%, more preferably 70 to 100 mass%, still more preferably 80 to 100 mass%, still more preferably 90 to 100 mass%, still more preferably 95 to 100 mass% , particularly preferably 98 to 100% by mass.
• the content of the component (B) is the lubricating oil composition Based on the total amount (100% by mass) of the product, preferably 0.1% by mass or more, more preferably 0.5% by mass or more, more preferably 0.7% by mass or more, and still more preferably 1.0% by mass or more, More preferably 1.2% by mass or more, still more preferably 1.5% by mass or more, still more preferably 1.7% by mass or more, particularly preferably 2.0% by mass or more, and further preferably 2.2% by mass % or more, 2.5 mass % or more, 2.7 mass % or more, 3.0 mass % or more, 3.2 mass % or more, 3.5 mass % or more, 3.7 mass % or more, 4.0 mass % Above, it may be 5.0% by mass or more, 6.0% by mass or more, or 7.0% by mass or more, and
• the lubricating oil composition of one embodiment of the present invention from the viewpoint of adjusting the conductivity to the above range to obtain a lubricating oil composition having excellent electrostatic oil applicability, and from the viewpoint of obtaining a lubricating oil composition having excellent rust prevention properties.
• the content of component (B) in terms of metal atoms is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition , more preferably 0.05% by mass or more, still more preferably 0.10% by mass or more, still more preferably 0.15% by mass or more, still more preferably 0.20% by mass or more, still more preferably 0.25% by mass % or more, particularly preferably 0.30 mass % or more, and further 0.35 mass % or more, 0.50 mass % or more, 0.70 mass % or more, 0.80 mass % or more, 0.90 mass % Above, it may be 1.00% by mass or more, 1.10% by mass or more, or 1.20% by mass or more, preferably 4.00% by mass or less, more preferably 3.70% by mass or less, and more preferably is 3.50% by mass or less, more preferably 3.20% by mass or less, even more preferably 3.00% by
• the lubricating oil composition of one embodiment of the present invention may contain a metal-based compound selected from metal salicylates and metal phenates as long as the effects of the present invention are not impaired.
• the specific content of the metal-based compound is 0 to 50 parts by mass, 0 to 20 parts by mass, and 0 to 10 parts by mass with respect to 100 parts by mass of the total amount of the component (B) contained in the lubricating oil composition.
• 0 to 5 parts by weight 0 to 2 parts by weight, 0 to 1 parts by weight, 0 to 0.1 parts by weight, 0 to 0.01 parts by weight, 0 to 0.001 parts by weight, 0 to 0.0001 parts by weight , or 0 to 0.00001 parts by mass.
• the lubricating oil composition of one aspect of the present invention may further contain additives other than the above components (A) to (B), if necessary, as long as the effects of the present invention are not impaired.
• additives include, for example, ashless dispersants, antioxidants, anti-copper discoloration agents, extreme pressure agents, friction modifiers, viscosity index improvers, antifoaming agents and the like. These additives may be used alone, or two or more of them may be used in combination.
• the content of each of these various additives is appropriately set depending on the type and function of each component, but the total amount of the lubricating oil composition (100 mass %) basis, 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, or 0.1% by mass or more, or 30% by mass or less , 20% by mass or less, 10% by mass or less, 5% by mass or less, 2% by mass or less, or 1% by mass or less.
• the lubricating oil composition of one embodiment of the present invention does not substantially contain sulfurized fats and oils.
• the specific sulfurized fat content is preferably less than 1% by mass, more preferably less than 0.1% by mass, and still more preferably 0.01% by mass, based on the total amount (100% by mass) of the lubricating oil composition. less than, more preferably less than 0.001% by mass, particularly preferably less than 0.0001% by mass.
• the lubricating oil of one embodiment of the present invention is substantially free of phosphorus-containing compounds.
• the specific content of the phosphorus-containing compound is preferably less than 1% by mass, more preferably less than 0.1% by mass, and still more preferably 0.01% by mass, based on the total amount (100% by mass) of the lubricating oil composition. %, more preferably less than 0.001 mass %, particularly preferably less than 0.0001 mass %.
• substantially does not contain component X is a definition that denies the aspect of containing component X for a predetermined purpose, and does not unintentionally constitute an impurity of other components. It is not a definition that denies even the mode in which the component X is mixed and contained.
• the method for producing the lubricating oil composition of one aspect of the present invention is not particularly limited, and comprises the step of blending the base oil (A) with the metal-based sulfonate (B) and, if necessary, other additives.
• a method is preferred.
• the order of blending of each component can be set appropriately.
• the kinematic viscosity at 40° C. of the lubricating oil composition of one embodiment of the present invention is preferably 2.50 mm 2 /s or more, more preferably 3.00 mm 2 /s or more, still more preferably 3.50 mm 2 /s or more, Still more preferably 4.00 mm 2 /s or more, particularly preferably 4.50 mm 2 /s or more, furthermore 5.00 mm 2 /s or more, 5.50 mm 2 /s or more, 6.00 mm 2 /s or more , 6.50 mm 2 /s or more, 7.00 mm 2 /s or more, or 7.50 mm 2 /s or more, preferably 15.0 mm 2 /s or less, more preferably 14.0 mm 2 /s below, more preferably 13.0 mm 2 /s or less, still more preferably 12.0 mm 2 /s or less, particularly preferably 11.0 mm 2 /s or less, further preferably
• the viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 60 or higher, more preferably 70 or higher, even more preferably 80 or higher, even more preferably 90 or higher, and particularly preferably 100 or higher.
• a lubricating oil composition of a preferred embodiment of the present invention has the base oil (A) and the metal-based sulfonate (B) as described above, and the conductivity is adjusted to a specific range, so that it has low VOC properties (VOC: volatile organic compound), it can be a lubricating oil composition excellent in workability, electrostatic oil coating property, and rust prevention property. Therefore, the lubricating oil composition of the present invention is suitable for sizing press processing and can be used as a sizing press processing oil.
• VOC volatile organic compound
• the lubricating oil composition of the present invention has excellent electrostatic oil applicability, an oil film made of the lubricating oil composition is formed on the sintered member using an electrostatic oil applicator during sizing press processing. be able to.
• the workability of sizing press processing can be improved, the amount of oil applied can be greatly reduced, and benefits can be obtained in terms of cost.
• the present invention can also provide the following [1] and [2].
• [1] A method of using the lubricating oil composition of one aspect of the present invention described above for sizing press working of a sintered member.
• [2] A method for processing a sintered member, comprising applying the lubricating oil composition of one embodiment of the present invention described above and subjecting the sintered member to sizing press working.
• Examples of the sintered metal forming the sintered member described in [1] and [2] above include copper-based sintered metals such as bronze, brass, and nickel silver; Fe-based sintered metals and Fe—C-based sintered metals; Iron-based sintered metals such as metals; Iron-copper alloy-based sintered metals such as Fe--Cu--C-based sintered metals and Fe--C--Cu--Ni-based sintered metals; Stainless steels such as Fe--Cr-based sintered metals aluminum-based sintered metal; titanium-based sintered metal; cemented carbide-based sintered metal;
• Mineral oil (a-3) A paraffinic mineral oil classified into Group II of the API base oil category with a 40° C.
• Mineral oil (a-8) A paraffinic mineral oil classified into Group I of the API base oil category with a 40° C.
• kinematic viscosity 90.5 mm 2 /s and a viscosity index of 104.
• Initial boiling point 413°C
• final boiling point 565°C.
• Electrostatic oil applicability was evaluated according to the following criteria based on the value of conductivity of the lubricating oil composition.
• A The electrical conductivity is 10,000 to 200,000 pS/m, and the electrostatic oil application property is good.
• ⁇ F The electrical conductivity is less than 10,000 pS/m or more than 200,000 pS/m, and the electrostatic oil application property is poor.
• test sample was prepared by applying the prepared lubricating oil composition to the surface of Fe—Cu—C based sintered metal and removing the oil for 24 hours.
• the test sample was allowed to stand in an environment of 23° C. and a relative humidity of less than 70%, and the period (up to 2 weeks) until rust occurred on the surface of the test sample was measured. Then, based on that period, the rust preventive property was evaluated according to the following criteria.
• B Rust generation was confirmed between more than 1 week and 2 weeks after standing.
• C Rust formation was confirmed within 1 week after standing.
• the lubricating oil compositions of Examples 1 to 13 had good low VOC properties, workability, electrostatic oil application properties, and rust prevention properties.
• the lubricating oil compositions of Comparative Examples 1 to 13 were inferior in at least one of low VOC property, workability, electrostatic oil application property, and rust prevention property.

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• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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• 2022
  • 2022-01-28 CN CN202280005329.XA patent/CN115943198A/zh active Pending
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