CN112280609A - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
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- CN112280609A CN112280609A CN201910665907.2A CN201910665907A CN112280609A CN 112280609 A CN112280609 A CN 112280609A CN 201910665907 A CN201910665907 A CN 201910665907A CN 112280609 A CN112280609 A CN 112280609A
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- 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
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
- C10M2205/0225—Ethene used as base material
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
- C10M2205/0245—Propene used as base material
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
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- 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
- C10M2209/0845—Acrylate; Methacrylate used as base material
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/086—Imides
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- 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
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
Abstract
The present invention relates to a lubricating oil composition containing (a) a base oil, (B) a viscosity index improver, and (C) an additive comprising: (C-1) a metal detergent, (C-2) a long-chain organic friction reducer, and (C-3) an organic molybdenum compound. The lubricating oil composition has the performance of inhibiting low-speed pre-ignition, the performance of inhibiting high-temperature deposits and good high-temperature cleaning performance, and can reduce friction and improve fuel economy.
Description
Technical Field
The invention belongs to the field of lubricating oil. In particular, the present invention relates to a lubricating oil composition suitable for use in engines.
Background
Currently, environmental regulations on a global scale are becoming stricter, and in the case of automobiles, energy saving and emission control are also becoming stricter. In order to improve the fuel economy and meet the increasingly strict fuel consumption regulations, the development and design optimization of the engine are carried out, but the problems of higher cost and possible compatibility with the original engine generally exist. In recent years, energy-saving lubricating oil has achieved good effects in improving fuel economy, and is a scheme for improving fuel economy with high cost performance.
From a system perspective, internal friction of engine components results in 15-20% energy loss, while the main role of the lubricating oil is to reduce friction and wear. The lubricating oil is used for lubricating all moving parts of the engine, so that the performance of the lubricating oil is improved, the friction loss of the engine can be effectively reduced, and the fuel economy is improved.
In addition, new engine technology presents new challenges to engine oils. Particularly, the turbocharging technology further brings high-temperature oxidation of the engine oil and coking and blockage in a turbocharging system; there is a need for engine oils having better resistance to high temperature oxidation and control of turbocharger deposits. However, the miniaturized turbocharged engine popular in recent years works in a state of low rotating speed and high torque and is easy to cause low-speed pre-ignition and even deflagration phenomenon when being subjected to a high-temperature condition; there is a need for engine oils having techniques and capabilities to ameliorate the problem of pre-ignition. Direct fuel injection technology, which brings about high fuel dilution of the engine oil, reduces the engine oil viscosity, brings about more pollutants and wear, requires better fuel dilution compatibility of the engine oil, and controls for intake valve deposits and soot. These demands require engine lubricating oils to ensure and satisfy protection of the entire lubricating system, control of frictional wear of the main friction pair of the engine, and durability to suppress low-speed pre-ignition and maintain high-temperature detergency and dispersancy, while pursuing better fuel economy.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a lubricating oil composition, which has the performance of inhibiting low-speed pre-ignition, the performance of inhibiting high-temperature sediments, good high-temperature cleaning performance, friction reduction and fuel economy improvement.
The problems to be solved by the invention are solved by the following technical scheme:
the present invention provides a lubricating oil composition containing (a) a base oil, (B) a viscosity index improver, and (C) an additive, wherein the additive (C) contains: (C-1) a metal detergent, (C-2) a long-chain organic friction reducer, and (C-3) an organic molybdenum compound.
The present invention provides a lubricating oil composition which has low-speed pre-ignition suppressing performance, high-temperature deposit suppressing performance, and excellent high-temperature detergency, and which can reduce friction and improve fuel economy. Specifically, the lubricating oil composition adopts a novel metal detergent, and has the performance of inhibiting low-speed pre-ignition of a supercharged or direct-injection supercharged engine; the base oil with low viscosity and the high-performance viscosity index improver are adopted, so that the viscosity of the engine oil is reduced, the fuel economy is improved, and the viscosity-temperature characteristic is better. On the basis, the purposes of reducing friction and reducing oil consumption under various working conditions of the engine are realized by adding the novel long-chain multifunctional organic antifriction additive and the organic molybdenum antifriction agent.
Drawings
FIG. 1 is the results of an anti-friction test using an SRV tester;
FIG. 2 is the results of an anti-friction test using actual engine back-drag friction work.
Detailed description of the preferred embodiments
The technical solution of the present invention is described in detail below.
The present invention provides a lubricating oil composition comprising (A) a base oil, (B) a viscosity index improver, and (C) an additive,
wherein the (C) additive comprises: (C-1) a metal detergent, (C-2) a long-chain organic friction reducer, and (C-3) an organic molybdenum compound.
(A) Base oil
The base oil (a) contained in the lubricating oil composition of the present invention may be a mineral oil, a synthetic oil, or a mixed oil of a mineral oil and a synthetic oil.
Examples of the mineral oil include paraffin-based mineral oils, intermediate-based mineral oils, and naphthene-based mineral oils obtained by a general purification method such as solvent purification or hydropurification; wax isomerization-based oils produced by isomerizing waxes produced by a Fischer-Tropsch synthesis process or the like, mineral oil-based waxes, and the like.
Examples of the synthetic oil include hydrocarbon-based synthetic oils and ether-based synthetic oils. Examples of the hydrocarbon-based synthetic oil include poly α -olefins such as polybutene, polyisobutylene, 1-octene oligomer, 1-decene oligomer, and ethylene-propylene copolymer, hydrogenated products thereof, and alkylbenzenes and alkylnaphthalenes. Examples of the ether-based synthetic oil include polyoxyalkylene glycol and polyphenylene ether.
As the base oil (a), 1 or more kinds selected from base oils classified into three types (iii types) and four types (iv types) in the base oil classification of American Petroleum Institute (API) are preferably used, and API three type base oils are more preferably used. From the viewpoint of improving detergency and fuel economy, it is preferable to use a combination of the API base oils and Polyalphaolefins (PAO).
Group III base oils are base oils having a saturated hydrocarbon content of greater than 90 mass%, a viscosity index of greater than 120, and a sulfur content of less than 0.3 mass%.
Group IV base oils refer to Polyalphaolefin (PAO) synthetic base oils such as PAO4, PAO6, PAO8, PAO10, PAO12 and the like.
The content of the (a) base oil is 60wt% or more, preferably 70wt% or more, and the upper limit thereof is preferably 95wt% or less, more preferably 90wt% or less, based on the total weight of the lubricating oil composition.
When the base oil of API three types is used in combination with the polyalphaolefin, the content of the polyalphaolefin is preferably 0 to 50wt%, more preferably 1 to 30wt%, and still more preferably 3 to 10wt% based on the total weight of the lubricating oil composition.
(B) Viscosity index improver
The lubricating oil composition of the present invention comprises (B) a viscosity index improver. Examples of the viscosity index improver (B) include olefin copolymers (e.g., ethylene-propylene copolymers), acrylate copolymers (e.g., polymethyl methacrylate), and styrene copolymers.
The amount of (B) viscosity index improver is preferably from about 1 to 15 wt.%, more preferably from 2 to 10 wt.%, based on the total weight of the lubricating oil composition.
(C) Additive agent
The (C) additive in the lubricating oil composition of the present invention comprises: (C-1) a metal detergent, (C-2) a long-chain organic friction reducer, and (C-3) an organic molybdenum compound.
The amount of (C) additives is preferably from about 5 to 20 wt.%, more preferably from 10 to 15 wt.%, based on the total weight of the lubricating oil composition.
< (C-1) Metal detergent >
Metal detergents function to solubilize, peptize, acid neutralize, wash, etc. in lubricating oils and impart a base or Total Base Number (TBN) to the lubricating oil. The metal detergent may be an alkaline earth metal detergent, and examples thereof include alkaline earth metal sulfonates, alkaline earth metal phenates, alkaline earth metal salicylates, and mixtures of two or more thereof. The alkaline earth metal is preferably calcium, magnesium, etc. Examples of metal detergents include, but are not limited to, calcium-containing detergents such as calcium sulfonate, calcium salicylate, calcium phenate, magnesium-containing detergents such as magnesium sulfonate, magnesium salicylate, magnesium phenate, and the like, and mixtures thereof. From the viewpoint of suppressing low-speed pre-ignition, a sulfonate detergent is preferred, and a calcium-magnesium complex sulfonate detergent is more preferred. Specifically, examples of the calcium-magnesium complex sulfonate type detergent include a superbase C having a total base number of 300 to 400mgKOH/g18Calcium alkylsulfonate and C20Magnesium alkylsulfonate, with excellent Ca/Mg ratioThe selection is about 2: 1.
the total base number of the metal type detergent is usually 10 to 500mgKOH/g, preferably 100 to 450 mgKOH/g. The total base number is a total base number determined based on a perchloric acid method.
Typically, the metal detergent is present in an amount of about 0.5 to about 8 wt.%, more preferably about 1 to about 4 wt.%, based on the total weight of the lubricating oil composition. Further, from the viewpoint of suppressing low-speed pre-ignition, the content of the calcium-containing detergent of the present invention is preferably 1400 ppm by weight or less in terms of calcium element, based on the total weight of the lubricating oil composition; the content of the magnesium-containing detergent of the present invention is preferably 700 ppm by weight or more in terms of magnesium element.
(C-2) Long-chain organic Friction reducing agent
The lubricating oil composition of the present invention contains a long-chain organic friction reducer. The long-chain organic friction reducer is a novel multifunctional high-efficiency friction reducer. The chemical composition may be 10 to 30 carbon atoms (sometimes abbreviated as "C10~30") a long-chain organic acid compound, a long-chain organic acid ester compound having 10 to 30 carbon atoms, and a long-chain organic acid ester compound having 10 to 20 carbon atoms (which may be abbreviated as" C "in some cases)10~20") of long-chain organic amides. Preferably C10~20A mixture of linear aliphatic amides and glycerol monooleate.
Compared with the traditional organic friction reducing agent, the novel long-chain organic friction reducing agent has stronger surface activity, can be more efficiently adsorbed on the metal surface to form a more compact friction protective layer, and can effectively reduce the friction coefficient of a boundary lubrication area and a mixed lubrication area. And experimental data of programs VID (program 6D, industry classical Fuel Economy Fuel Economy test) and VIE (program 6E, industry latest Fuel Economy Fuel Economy test) show that the long-chain organic friction reducer has good aging resistance, and the FEI2 (Fuel Economy Improvement 2, Fuel Economy Improvement of aging oil) has good results, and can effectively make up for the aging resistance of the organic molybdenum compound.
The content of the (C-2) component is about 0.2 to 1.5 wt.%, preferably about 0.3 to 1.0 wt.%, more preferably about 0.5 to 0.8 wt.%, based on the total weight of the lubricating oil composition.
< C-3) organic molybdenum Compound >
The lubricating oil composition of the present invention contains an organic molybdenum compound, which may be a dinuclear organic molybdenum compound, and can achieve an excellent friction reducing effect. Examples of dinuclear organomolybdenum compounds include, but are not limited to, molybdenum dialkyldithiocarbamate (MoDTC), molybdenum dialkyldithiophosphate (MoDTP), molybdenum amine compounds (MoAMN), and preferably molybdenum dialkyldithiocarbamate.
Specifically, the compound may be a molybdenum dialkyldithiocarbamate represented by the following formula (1) or formula (2).
In the formula (1), R1~R4Each independently represents an alkyl group, X1~X4Each independently represents an oxygen atom or a sulfur atom.
An alkyl group R contained in a molybdenum dialkyldithiocarbamate represented by the formula (1)1~R4Each independently an alkyl group having 2 to 30 carbon atoms, preferably an alkyl group having 2 to 15 carbon atoms, more preferably an alkyl group having 2 to 8 carbon atoms.
In the formula (2), R1~R4The same as above.
Specifically, molybdenum dialkyldithiocarbamates can be used as commercially available ones, such as Sakura-lube chamber 525, Sakura-lube chamber 710; or Vanderbilt Chemicals, LLC. Molyvan 855, et al.
The content of the (C-3) component is 200-1000 mass ppm in terms of molybdenum element based on the total weight of the lubricating oil composition. By using the molybdenum content in this range, a good friction reducing effect can be obtained. Further, it is preferable from the viewpoint of fuel efficiency reduction and improvement of fuel economy. The molybdenum content is preferably 300-800 mass ppm, more preferably 300-700 mass ppm, from the viewpoint of balance between the overall performance and the formulation of the lubricating oil.
< other additives >
The additive (C) of the lubricating oil composition of the present invention may contain, in addition to the components (C-1) to (C-3), other additives such as dialkyldithiophosphates, antioxidants, oil-soluble organic titanium, ashless dispersants, antifoaming agents, metal deactivators, rust inhibitors, diluents, and the like.
Dialkyl dithiophosphates provide antioxidant and antiwear properties to lubricating oil compositions and are widely used in lubricating oils, especially engine oils. The metal dialkyldithiophosphate provides a majority of the phosphorus content of the lubricating oil composition. The amount of phosphorus in the metal dialkyldithiophosphate is about 0.08 wt.% or less, preferably 0.05 to 0.07 wt.%, based on the total weight of the lubricating oil composition, wherein the metal is preferably zinc. The zinc dialkyldithiophosphate is a zinc dialkyldithiophosphate having a primary or secondary alkyl group having 1 to 24 carbon atoms and an alkylaryl group substituted with an alkyl group having 3 to 18 carbon atoms. These may be used alone, or 2 or more of them may be used in combination.
As the antioxidant, a phenol-based antioxidant and/or an amine-based antioxidant can be used, and these components belong to the primary antioxidants of lubricating oils. Primary antioxidants, also known as chain terminators, are the first line of defense against engine oil oxidation, and react with peroxy Radicals (ROO) and then alkyl Radicals (RO) to control and cut off the chain reaction of oxidation. Examples of the primary antioxidant include, but are not limited to, phenol-based antioxidants such as 2, 6-di-tert-butylphenol, 4-methyl-6-tert-butylphenol, 2-methyl-6-tert-butylphenol, hydroquinone, and benzoic acid, and amine-based antioxidants such as diphenylamine, monoalkyldiphenylamine having an alkyl group with 3 to 20 carbon atoms, or dialkyldiphenylamine having an alkyl group with 3 to 20 carbon atoms. The antioxidant is present in an amount of about 0.5 to about 5 wt.%, more preferably 1 to about 4 wt.%, based on the total weight of the lubricating oil composition.
The oil-soluble organic titanium can be oil-soluble organic titanate, has better corrosion resistance and oxidation resistance, has excellent synergistic effect with amines and other antioxidants, and can effectively control the corrosion and wear of engine parts, particularly nonferrous metals such as bearing bushes and bearings and the like and the aging of engine oil. In addition, the component also has a certain inhibiting effect on the formation of deposits in the combustion chamber and low-speed pre-ignition. The oil-soluble organotitanium is present in an amount of about 0.01 to about 0.2 wt.%, more preferably 0.03 to about 0.09 wt.%, based on the total weight of the lubricating oil composition.
Examples of the ashless dispersant include polyisobutylene succinimide, polybutenyl benzylamine, polybutenyl amine having a number average molecular weight of 900-4000, and boric acid-modified derivatives thereof. These may be used alone or in combination of two or more.
Examples of the antifoaming agent include polymethylsiloxane, polyacrylate, and acrylate ether copolymer, and a polymethylsiloxane-based antifoaming agent is particularly preferably used.
Examples of the metal deactivator include benzotriazole, triazole derivatives, benzotriazole derivatives, and thiadiazole derivatives. Inhibiting the catalytic action of the metal and thereby retarding the decay of the lubricating oil. These may be used alone or in combination of two or more.
Examples of the rust inhibitor include petroleum sulfonates, carboxylates and derivatives thereof, esters, organic phosphoric acids and salts thereof, amines, amine salts, amine derivatives, heterocyclic compounds, and the like.
(D) Pour point depressant
The lubricating oil composition of the present invention may further contain (D) a pour point depressant. Examples of the pour point depressant include ethylene-vinyl acetate copolymers, condensates of chlorinated paraffins and phenols, polyalkylmethacrylates, polyalkylstyrenes, and the like. Preferably, polyalkylmethacrylates are used.
Examples
The concept and the technical effects of the present invention will be further described with reference to the following examples so that those skilled in the art can fully understand the objects, features and effects of the present invention. It is to be understood that these examples are illustrative only and are not to be construed as limiting the scope of the invention.
Example 1
Step 1: preparation of additive packages
Washing a blending kettle, adding 6wt% of polyisobutylene succinimide according to the total mass of the lubricating oil composition to be prepared, heating to 80-90 ℃, and stirring for 15 minutes; then adding 1.8wt% of sulfonate detergent (compounded by calcium sulfonate with high base number and magnesium sulfonate with high base number of C18-20), 0.5wt% of long-chain multifunctional organic antifriction additive (a glycerol oleate mixture), 0.3wt% of molybdenum dialkyl dithiocarbamate (the alkyl carbon chain is C8-C13, Sakuralube series of Adeka), 0.02wt% of silicone oil antifoaming agent (dimethyl silicone oil with the molecular weight of 10000-20000), 0.8wt% of zinc dialkyl dithiophosphate (secondary alkyl zinc dithiophosphate of C4/C6 mixture), 1.4wt% of alkyl diphenylamine (dioctyl diphenylamine) and phenolic antioxidant (tert-butyl phenol antioxidant, Irganox series product of BASF), heating to 70-90 ℃ and stirring for 20-40 minutes until uniform mixing and no phase separation are realized. And detecting various indexes (infrared, elements, viscosity and the like) to be qualified for later use, thus obtaining the additive package for the lubricating oil composition.
Step 2: preparation of lubricating oil compositions
Cleaning a blending kettle, pumping 76.5wt% of API three base oil (hydroisomerized alkane of C15-40, Yubase product of SK company of Korea) and 9.5wt% of poly-alpha olefin (decene oligomer of C18-30, SpectraSyn series product of Exxon Mobil company) into the kettle, and heating to 70-80 ℃; pumping 3wt% of ethylene-propylene copolymer liquid adhesive (ethylene-propylene copolymer, molecular weight 15-20 ten thousand, Luboluzu OCP 7075F) and 0.18wt% of pour point depressant (poly-tetradecyl methacrylate) into a kettle, heating to 70 ℃ (± 5 ℃), and stirring for at least 15 minutes until uniformly mixing; the additive package prepared in step 1 above was added, maintained at 70 ℃ (± 5 ℃) and stirred for more than 15 minutes until uniformly mixed to give the lubricating oil composition.
Example 2
Washing a blending kettle, adding 6wt% of polyisobutylene succinimide according to the total mass of the lubricating oil composition to be prepared, heating to 80-90 ℃, and stirring for 15 minutes; then adding 1.8wt% of sulfonate detergent (compounded by calcium sulfonate with high base number and magnesium sulfonate with high base number of C18-20), 0.5wt% of long-chain multifunctional organic antifriction additive (a glycerol oleate mixture), 0.3wt% of molybdenum dialkyl dithiocarbamate (the alkyl carbon chain is C8-C13, Sakuralube series of Adeka), 0.02wt% of silicone oil antifoaming agent (dimethyl silicone oil with the molecular weight of 10000-20000), 0.8wt% of zinc dialkyl dithiophosphate (secondary alkyl zinc dithiophosphate of C4/C6 mixture), 1.4wt% of alkyl diphenylamine (dioctyl diphenylamine) and phenolic antioxidant (tert-butyl phenol antioxidant, Irganox series product of BASF), heating to 70-90 ℃ and stirring for 20-40 minutes until uniform mixing is realized without phase separation. And detecting various indexes (infrared, elements, viscosity and the like) to be qualified for later use, thus obtaining the additive package for the lubricating oil composition.
Cleaning a blending kettle, pumping 86wt% of API three-class base oil (hydroisomerized alkane of C15-40, a Yubase product of Korea SK company) into the kettle, and heating to 70-80 ℃; pumping 3wt% of ethylene-propylene copolymer liquid adhesive (ethylene-propylene copolymer, molecular weight 15-20 ten thousand, Luboluzu OCP 7075F) and 0.18wt% of pour point depressant (poly-tetradecyl methacrylate) into a kettle, heating to 70 ℃ (± 5 ℃), and stirring for at least 15 minutes until uniformly mixing; the additive package prepared in step 1 above was added, maintained at 70 ℃ (± 5 ℃) and stirred for more than 15 minutes until uniformly mixed to give the lubricating oil composition.
Evaluation of frictional wear Property and energy saving Effect
Reference oil a: API SN/ILSAC GF-5 full-formula 0W20 engine oil
Reference oil B: API SN/ILSAC GF-5 fully formulated 5W30 motor oil.
Test example 1
The lubricating oil compositions obtained in examples 1 and 2 were compared with reference oil A in terms of the friction characteristics of the oils using an SRV tester (reciprocating friction and wear tester). The test conditions were: load 400N, frequency 50Hz, temperature 100 ℃. And (3) respectively testing the reference oil A and the oil products in the embodiments 1 and 2 by using a friction wear testing machine for 45 minutes, so that the engine oil supply is ensured, and the friction pair is ensured to be in a fluid lubrication state.
As shown in fig. 1, the test results are: after running-in was stabilized, the friction coefficient of reference oil a was 0.14, whereas the friction coefficients of examples 1 and 2 were 0.045 and 0.054, respectively, which were significantly reduced.
Test example 2
The lubricating oil compositions prepared in examples 1 and 2 were compared with reference oil B for anti-friction tests using actual engine back-drag friction work.
The engine used in the test was a 1.0L turbocharged direct injection gasoline engine. The engine is connected with the dynamometer through a torque flange, and the friction torque values under different working conditions are tested by dragging the engine by the motor in a non-ignition state.
The test begins to install the whole engine, including all finished vehicle accessories: air intake and exhaust systems (an air intake filter, an air intake manifold and an exhaust pipe) and an accessory drive system (in an idle state, a gear train function). Controlling the rotation speed of the engine, the opening degree of the valve, the water temperature and the engine oil temperature. The test conditions are as follows: the rotation speed is 650-.
And (3) using the reference oil B to carry out engine running-in, controlling the temperature of the engine oil to be 100 ℃, gradually increasing the rotating speed of the engine from 650rpm to 4000rpm, and measuring the back-dragging friction work curve of the whole machine. The bench parameters and stability were adjusted and friction torque (F1) and work of friction curves were recorded at the required NEDC operating point when run-in data repeatability was within the trial control range.
Then, the engine was flushed with the special cleaning oil and test oil 1 (example 1), and the friction torque of test oil 1 was measured under the same conditions (F2). The engine was washed again with the special wash oil and test oil 2 (example 2) and the friction torque of test oil 2 was measured under the same conditions (F3). Finally, the engine is flushed with the special-purpose washing oil and the reference oil B, and the second friction torque of the reference oil B is measured (F4). The data of F1 and F4 are guaranteed to be stable and cannot be greatly different, otherwise, the test process is retested.
The average value of the reference oil friction torque F1 and the friction torque F4 is compared with the friction torque (F2, F3) of the test oil in the two types of examples 1 and 2, the torque difference between the reference oil and the test oil (difference = average value of the reference oil friction torque-friction torque of the test oil) is calculated, and the reduction ratio of the friction torque of the test oil can also be calculated.
As shown in FIG. 2, we take the main operating points of the engine on the entire vehicle NEDC hub test and examine the contribution of the test oils of example 1 and example 2 to the reduction of friction torque under these operating points.
It can be seen from the figure that: the combined friction work data of examples 1 and 2, compared to reference oil B, results in a friction torque saving of 5% or more.
From these test results, it is clear that the lubricating oil composition of the present invention has the following advantages and positive effects: compared with the existing engine oil such as API SN/ILSAC GF-55W 30 and the like, the energy can be saved by 5-10 percent (comprehensive friction work expression), and meanwhile, multiple effects of inhibiting low-speed pre-ignition, improving high-temperature cleaning dispersion performance, reducing friction and abrasion, better controlling engine oil oxidation and aging and the like are provided. The following table shows the test data of example 1 on a low speed pre-ignition stage and an oxidation and high temperature detergency stage in the lubricating oil industry, which shows excellent performance.
Although a few aspects of the present invention have been shown and discussed, it would be appreciated by those skilled in the art that changes may be made in this aspect without departing from the principles and spirit of the invention, the scope of which is therefore defined in the claims and their equivalents.
Claims (10)
1. A lubricating oil composition characterized by containing (A) a base oil, (B) a viscosity index improver and (C) an additive,
the additive (C) comprises a metal detergent, a long-chain organic friction reducer, and an organic molybdenum compound.
2. The lubricating oil composition of claim 1, wherein the metal detergent is a calcium magnesium complex sulfonate detergent.
3. Lubricating oil composition according to claim 1 or 2, characterized in that the metal detergent is present in an amount of 0.5 to 8 wt.%, based on the total weight of the lubricating oil composition.
4. Lubricating oil composition according to any of claims 1 to 3, characterized in that the long-chain organic friction reducer is selected from C10~30Organic acid Compound, C10~30Organic ester compound and C10~20One or more than two organic amide compounds.
5. Lubricating oil composition according to any of claims 1 to 4, characterized in that the long-chain organic friction reducer is present in an amount of 0.2 to 1.5 wt.%, based on the total weight of the lubricating oil composition.
6. Lubricating oil composition according to any of claims 1 to 5, characterized in that the organomolybdenum compound is molybdenum dialkyldithiocarbamate.
7. The lubricating oil composition according to any one of claims 1 to 6, wherein the content of the organomolybdenum compound is 200-1000 mass ppm in terms of molybdenum element, based on the total weight of the lubricating oil composition.
8. The lubricating oil composition according to any one of claims 1 to 7, further comprising (D) a pour point depressant.
9. The lubricating oil composition according to any one of claims 1 to 8, wherein the additive (C) further comprises another additive selected from the group consisting of dialkyldithiophosphates, antioxidants, oil-soluble organotitanium, ashless dispersants, antifoaming agents, metal deactivators, rust inhibitors, and diluent oils.
10. Use of a combination of a long chain organic friction reducer and an organo-molybdenum compound in the preparation of a lubricating oil.
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