CN114644951A - Automobile engine lubricating oil and application thereof - Google Patents
Automobile engine lubricating oil and application thereof Download PDFInfo
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- CN114644951A CN114644951A CN202110318920.8A CN202110318920A CN114644951A CN 114644951 A CN114644951 A CN 114644951A CN 202110318920 A CN202110318920 A CN 202110318920A CN 114644951 A CN114644951 A CN 114644951A
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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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic 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
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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
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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
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
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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
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
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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
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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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
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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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
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
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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
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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
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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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
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
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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
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/109—Polyethers, i.e. containing di- or higher polyoxyalkylene groups esterified
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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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/024—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amido or imido group
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention provides an automobile engine lubricating oil and application thereof, wherein the raw materials comprise 80-90 parts of base oil, 0.1-0.5 part of carbon nano-agent, 2-5 parts of dispersant, 0.5-1.5 parts of detergent, 0.3-8 parts of antioxidant, 0.3-0.5 part of pour point depressant and 2-5 parts of viscosity index improver. The automobile engine lubricating oil provided by the invention has excellent performances of good wear resistance, oxidation resistance, strong effective cleaning property and the like, and is low in cost, energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to automobile engine lubricating oil and application thereof.
Background
In various types of automobile transmission, friction and abrasion are inevitably caused between mechanical parts, so that not only can the consumption of materials and the environmental pollution be caused, but also the service life of the automobile is reduced, and further the life safety of people is threatened. The lubricating oil for automobile engine is known as the blood of automobile and includes two parts of base oil and additive, which may be mineral lubricating oil, synthetic lubricating oil, semi-synthetic lubricating oil, etc. based on the difference of base oil. The lubricating and wear-reducing device can play a role in lubricating and reducing wear of an engine, and has the functions of auxiliary sealing, corrosion prevention, rust prevention, insulation and impurity cleaning.
In general, in order to improve the friction-reducing and anti-wear capacity of lubricating oil, friction-reducing and anti-wear additives are usually added, but the traditional friction-reducing and anti-wear additives contain elements such as phosphorus and the like, so that the environment is polluted. With the improvement of the standard of engine lubricating oil, the components and the content of additives are continuously improved, carbon nano materials are more and more concerned due to excellent lubricating performance, but the carbon nano materials are agglomerated, so that the prepared lubricating oil is poor in stability, and how to uniformly disperse the carbon nano materials in oil products so as to obtain the lubricating oil with good stability and wear reduction becomes a problem which needs to be solved at present. In addition, lubricating oil is easy to lose effectiveness under high temperature and high load, and the service life of the lubricating oil is seriously influenced by the problems of overhigh acid value and the like.
Disclosure of Invention
In order to solve the technical problem, the first aspect of the invention provides an automobile engine lubricating oil, which comprises, by weight, 80-90 parts of base oil, 0.1-0.5 part of carbon nano-agent, 2-5 parts of dispersant, 0.5-1.5 parts of detergent, 0.3-8 parts of antioxidant, 0.3-0.5 part of pour point depressant and 2-5 parts of viscosity index improver.
As a preferred embodiment, the base oil includes polyester base oil, polyalphaolefin base oil, and polyol ester base oil.
As a preferred technical scheme, the polyol ester base oil comprises one or more of neopentyl glycol ester, pentaerythritol ester, trimethylolpropane ester and isooctyl alcohol ester.
As a preferable technical scheme, the dispersant comprises one or more of Tween-20, oleic acid, stearic acid, diisobutyl perylenedicarboxylate, span-80 and polyisobutenyl succinimide.
As a preferred technical scheme, the detergent is a metal salt detergent.
As a preferable technical scheme, the metal salt detergent is a calcium-magnesium composite detergent.
As a preferred technical scheme, the antioxidant comprises a compound of a sulfur-containing shielding phenol antioxidant and an alkyl diphenylamine antioxidant.
As a preferable technical scheme, the antioxidant also comprises an organic metal salt auxiliary antioxidant.
As a preferable technical scheme, the pour point depressant comprises one or more of polymethacrylate, vinyl acetate/fumarate copolymer, alkylated polystyrene and alkyl naphthalene.
As a preferable technical scheme, the viscosity index improver comprises one or more of polymethacrylate, ethylene-propylene copolymer, hydrogenated isopropenyl isoprene copolymer and poly-n-butyl vinyl ether.
The second aspect of the invention provides application of the automobile engine lubricating oil, which is mainly applied to the aspect of automobile engines.
Has the advantages that:
1) the automobile engine lubricating oil prepared by the invention has excellent wear resistance and oxidation resistance, and can help to prolong the service life of an engine.
2) The automobile engine lubricating oil prepared by the invention has excellent strong and effective cleaning performance and high and low temperature resistance, and can be normally used even in cold conditions.
3) The automobile engine lubricating oil prepared by the invention has the advantages of low cost, energy conservation, environmental protection, long service life and long oil change period.
Detailed Description
In order to solve the technical problem, the first aspect of the invention provides an automobile engine lubricating oil, which comprises, by weight, 80-90 parts of base oil, 0.1-0.5 part of carbon nano-agent, 2-5 parts of dispersant, 0.5-1.5 parts of detergent, 0.3-8 parts of antioxidant, 0.3-0.5 part of pour point depressant and 2-5 parts of viscosity index improver.
The lubricant mainly comprises base oil and additives, wherein the base oil is generally divided into five types, the base oil I is mainly used for refining crude oil by a physical method, and the lubricant is rarely adopted at present due to higher sulfur content and lower viscosity index; the II base oil is produced by adopting a combined process (combining a solvent process and a hydrogenation process), has good thermal stability and oxygen resistance, and can not remove all the unfavorable substances and impurities. Group III base oils are semi-synthetic oils with very high viscosity index and very low volatility. Group IV base oils are primarily polyalphaolefins, and have lower pour points and greater resistance to external variables than mineral oils, and greater resistance to thermal stabilization, oxidation reactions, and viscosity changes than mineral oils. The V-type base oil is prepared by chemically synthesizing diester, polyol ester, polyether, silicone oil, phosphate and the like by refining animal and plant (biological) fatty acids and alcohol. The ester base oil has excellent lubricating effect, and especially has better lubricating effect under high temperature condition.
As a preferred embodiment, the base oil includes polyester base oil, polyalphaolefin base oil, and polyol ester base oil.
As a preferred technical scheme, the kinematic viscosity of the polyester base oil at 100 ℃ is 30-40 cst.
As a preferred technical scheme, the polyalphaolefin base oil is C6-C14.
As a preferred embodiment, the polyalphaolefin base oil has a kinematic viscosity of 5 to 7cst at 100 ℃.
As a preferred technical scheme, the polyol ester base oil comprises one or more of neopentyl glycol ester, pentaerythritol ester, trimethylolpropane ester and isooctyl alcohol ester.
As a preferred technical scheme, the kinematic viscosity of the polyol ester base oil at 100 ℃ is 13-15 cst.
As a preferred technical solution, the polyester base oil: polyalphaolefin base oil: the weight ratio of the polyol ester base oil is 3-8: 10-25: 1-2.
The carbon nano agent has good lubricity, chemical stability and other properties, and is widely applied to lubricating oil. The lubricating oil additive not only can reduce the using amount of the lubricating oil, but also can increase the lubricating property of the lubricating oil, reduce the damage of the lubricating oil to a machine in an extreme pressure state and play a role in friction reduction and friction resistance.
As a preferred technical solution, the carbon nano-agent includes a two-dimensional carbon nano-agent and a zero-dimensional carbon nano-agent.
As a preferable technical solution, the weight ratio of the two-dimensional carbon nano agent to the zero-dimensional carbon nano agent is (1-9.5): 1.
as a preferred technical solution, the two-dimensional carbon nano-agent is graphene.
As a preferable technical scheme, the zero-dimensional carbon nano agent comprises one or more of fullerene and amorphous carbon spheres.
The dispersing agent can improve the dispersion uniformity of various raw materials in the system and improve the compatibility among various substances. Meanwhile, the carbon nano-agent is modified by the dispersant, so that the carbon nano-agent has good dispersion stability and higher surface activity.
As a preferable technical scheme, the dispersant comprises one or more of Tween-20, oleic acid, stearic acid, diisobutyl perylenedicarboxylate, span-80 and polyisobutenyl succinimide.
The detergent has certain cleaning, dispersing, antioxidant and antirust performance, can inhibit and eliminate the deposit inside the system when added into lubricating oil, and has no corrosion and other bad influence on automobile parts because no ash is produced during combustion, so that the detergent can ensure the normal performance of automobile engine, reduce the maintenance cost of automobile and prolong the service life.
As a preferred technical scheme, the detergent is a metal salt detergent.
As a preferable technical scheme, the metal salt detergent is a calcium-magnesium composite detergent.
The antioxidant can improve the oxidation stability of the lubricating oil and prevent the adverse effect of the catalytic oxidation of the temperature, metal parts and the like on the engine of the automobile, and the antioxidant has a plurality of types, but the lubricating oil for the automobile engine has higher requirements on the type and the content of the antioxidant due to the application limitations of high temperature, sulfur content and the like.
As a preferred technical scheme, the antioxidant comprises a compound of a sulfur-containing shielding phenol antioxidant and an alkyl diphenylamine antioxidant.
As a preferable technical scheme, the antioxidant also comprises an organic metal salt auxiliary antioxidant.
The pour point depressant can lower the freezing point of the lubricating oil. The lubricating oil is usually composed of various kinds such as alkylnaphthalene, polymethacrylate, and polyalpha-olefin. The pour point depressant is added in a small amount, so that the apparent viscosity and yield value freezing point of the oil can be obviously reduced, the low-temperature fluidity of the lubricating oil is improved, and the application range of the lubricating oil is widened.
As a preferable technical scheme, the pour point depressant comprises one or more of polymethacrylate, vinyl acetate/fumarate copolymer, alkylated polystyrene and alkyl naphthalene.
The viscosity index improver can improve the viscosity-temperature performance of the lubricating oil, so that the lubricating oil has higher viscosity index and smooth viscosity-temperature curve. The viscosity index improver is added into the lubricating oil, so that the lubricating oil has good low-temperature starting performance, can keep proper viscosity at high temperature, improves the performance of the lubricating oil and improves the four-season universality of the lubricating oil.
As a preferable technical scheme, the viscosity index improver comprises one or more of polymethacrylate, ethylene-propylene copolymer, hydrogenated isopropenyl isoprene copolymer and poly-n-butyl vinyl ether.
The second aspect of the invention provides application of the automobile engine lubricating oil, which is mainly applied to the aspect of automobile engines.
The mechanism is explained as follows: the invention has the advantages that the unexpected research discovers that the formed lubricating oil has moderate viscosity by selecting proper base oil and limiting the viscosity of the base oil, can form a thicker oil film and plays a role in protecting the friction of an automobile engine; but also avoid the high viscosity, so that the lubricating oil has good low-temperature startability. According to the invention, the two-dimensional graphene and the zero-dimensional fullerene are selected for compounding, and the carbon nanomaterials with different dimensions exert the advantages of all dimensions, so that the lubricating oil can also exert excellent antifriction effect under harsh conditions. According to the invention, the sulfur-containing shielding phenol antioxidant and the alkyl diphenylamine antioxidant are selected for compounding, and the addition of the organic molybdenum improves the oxidation induction time, reduces the use amount of the sulfur-containing shielding phenol antioxidant and the alkyl diphenylamine antioxidant, and saves energy and reduces emission. The organic molybdenum can further improve the antifriction effect of the lubricating oil, so that the lubricating oil has more excellent performance.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
The automobile engine lubricating oil comprises, by weight, 87 parts of base oil, 0.4 part of carbon nano-agent, 3 parts of dispersant, 1 part of detergent, 0.5 part of antioxidant, 0.4 part of pour point depressant and 4 parts of viscosity index improver.
The base oil comprises polyester base oil, poly-alpha-olefin base oil and polyol ester base oil. The weight ratio of the polyester base oil, the polyalphaolefin base oil and the polyol ester oil is 4: 20: 1. the polyester base oil is purchased from Beijing Yangtte commercial, Limited liability company, brand number: KL 135; the polyalphaolefin base oil is purchased from shanghai heptacherie international trade limited, under the brand number: PAO 6. The polyol ester base oil is pentaerythritol ester base oil, which is purchased from Hangzhou Youmi chemical Co., Ltd, and has the trade mark: TRQY-28.
The carbon nanoagents include graphene and nano-fullerene. The weight ratio of the graphene to the nano fullerene is 9: 1. the graphene is purchased from Jiangsu Xiancheng nano material science and technology company, and the nano fullerene is purchased from Aladdin company.
The dispersant is perylene diisobutyl phthalate. The dispersant was purchased from chinlon technologies.
The detergent is a calcium-magnesium composite detergent. The calcium-magnesium composite detergent is ultrahigh-base-number calcium sulfonate and ultrahigh-base-number magnesium sulfonate, and the weight ratio of the calcium-magnesium composite detergent to the ultrahigh-base-number magnesium sulfonate is 2: 1. the ultrahigh base number calcium sulfonate is purchased from Jiazhi chemical products of Liaoning, Ltd; the ultrahigh base number magnesium sulfonate was purchased from Refeng New materials, Inc. of New county, New county.
The antioxidant comprises a compound of a sulfur-containing shielding phenol antioxidant and an alkyl diphenylamine antioxidant. The sulfur-containing shielding phenol antioxidant is an antioxidant 1035, and the alkyl diphenylamine antioxidant is DODPA. The antioxidant 1035 is purchased from Changzhou Xinze polymer materials, Inc.; the antioxidant DODPA is purchased from Bohai chemical industry Co., Ltd. The antioxidant also comprises an auxiliary antioxidant, and the auxiliary antioxidant is non-sulfur-phosphorus organic molybdenum. The antioxidant aid is purchased from Beijing Pacific United petrochemical Co. The sulfur-containing shielding phenol antioxidant comprises: alkyl diphenylamine antioxidant: the weight ratio of the auxiliary antioxidant is 1: 1: 0.5.
the pour point depressant is alkyl naphthalene. The alkylnaphthalene was purchased from exxonmobil chemical.
The viscosity index improver is ethylene propylene copolymer. The viscosity index improver is purchased from Shanghai Ming lan chemical Co.
Example 2
The specific implementation mode of the automobile engine lubricating oil is the same as that of the example 1, except that 87 parts of base oil, 0.4 part of carbon nano-agent, 3 parts of dispersant, 1 part of detergent, 0.5 part of antioxidant, 0.4 part of pour point depressant and 4 parts of viscosity index improver are adopted.
Example 3
An automobile engine lubricating oil, the specific embodiment being the same as in example 1, except that the polyester base oil: polyalphaolefin base oil: the weight ratio of the pentaerythritol ester base oil is 4: 15: 1.
example 4
The specific implementation mode of the automobile engine lubricating oil is the same as that of the embodiment 1, except that the carbon nano agent is graphene.
Example 5
The specific implementation mode of the automobile engine lubricating oil is the same as that of the embodiment 1, except that the carbon nano agent is graphene. The pentaerythritol ester base oil has a kinematic viscosity of 5-7cst at 100 ℃. The pentaerythritol ester base oil is purchased from Hangzhou Youmi chemical industry Co., Ltd, and is of a mark: TRRL-32.
Example 6
The specific implementation mode of the automobile engine lubricating oil is the same as that of the embodiment 1, except that the carbon nano agent is graphene. The polyalphaolefin base oil has a kinematic viscosity of 45-50cst at 100 ℃. The polyalphaolefin base oil is purchased from shanghai heptacherie international trade limited, under the brand number: PAO 8.
Comparative example 1
An automobile engine lubricating oil, the specific embodiment being the same as in example 1, except that the polyester base oil: polyalphaolefin base oil: the weight ratio of the polyol ester base oil is 1: 20: 1.
comparative example 2
An automobile engine lubricating oil, the specific embodiment being the same as in example 1, except that the polyester base oil: polyalphaolefin base oil: the weight ratio of the polyol ester base oil is 4: 30: 1.
comparative example 3
An automobile engine lubricating oil, according to the same embodiment as in example 1, except that the antioxidant does not comprise a secondary antioxidant.
Comparative example 4
An automobile engine lubricating oil, the specific embodiment being the same as in example 1, except that the dispersant is stearic acid.
Performance testing
TABLE 1
| Item | Example 1 | Example 2 | Example 3 | Test method |
| Kinematic viscosity/cst (100 ℃ C.) | 10.9 | 10.9 | 10.8 | GB/T265 |
| Flash point/. degree.C | 252 | 251 | 250 | GB/T3536 |
| Pour point/. degree.C | -43 | -42 | -43 | GB/T3535 |
| Low temperature dynamic viscosity mPa.s (-35 ℃ C.) | <6000 | <6000 | <6000 | GB/T6538 |
| Shear reduction rate% | <0.3％ | <0.3％ | <0.3％ | SH/T0103 |
TABLE 2
| Experimental methods | ASTMD-2783 | GB/T0193-2008 |
| Item | Abrasion diameter/(mm) | Oxidation stability/min |
| Example 1 | 0.322 | 346 |
| Example 2 | 0.328 | 342 |
| Example 3 | 0.325 | 344 |
| Example 4 | 0.343 | 336 |
| Example 5 | 0.360 | 332 |
| Example 6 | 0.356 | 327 |
| Comparative example 1 | 0.370 | 328 |
| Comparative example 2 | 0.365 | 325 |
| Comparative example 3 | 0.338 | 311 |
| Comparative example 4 | 0.356 | 320 |
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
1. The automobile engine lubricating oil is characterized in that the raw materials comprise, by weight, 80-90 parts of base oil, 0.1-0.5 part of carbon nano-agent, 2-5 parts of dispersant, 0.5-1.5 parts of detergent, 0.3-8 parts of antioxidant, 0.3-0.5 part of pour point depressant and 2-5 parts of viscosity index improver.
2. The automotive engine lubricating oil of claim 1, wherein the base oil comprises a polyester base oil, a polyalphaolefin base oil and a polyol ester base oil.
3. The automotive engine lubricating oil of claim 2, wherein the polyol ester base oil comprises one or more of neopentyl glycol ester, pentaerythritol ester, trimethylolpropane ester, isooctyl alcohol ester.
4. The automotive engine lubricating oil of claim 1, wherein the dispersant comprises one or more of tween-20, oleic acid, stearic acid, diisobutyl perylenedicarboxylate, span-80, and polyisobutenyl succinimide.
5. The automotive engine lubricating oil of claim 1, wherein the detergent is a metal salt detergent.
6. The automotive engine lubricating oil of claim 5, wherein the metal salt detergent is a calcium-magnesium complex detergent.
7. The automotive engine lubricating oil of claim 1, wherein the antioxidant comprises a combination of a sulfur-containing masked phenol antioxidant and an alkyl diphenylamine antioxidant.
8. The automotive engine lubricating oil of claim 1, wherein the pour point depressant comprises one or more of polymethacrylate, vinyl acetate/fumarate copolymers, alkylated polystyrene, and alkylnaphthalene.
9. The automotive engine lubricating oil of claim 1, wherein the viscosity index improver comprises one or more of polymethacrylate, ethylene-propylene copolymer, hydrogenated isoprene copolymer and poly-n-butyl vinyl ether.
10. Use of an automotive engine lubricating oil according to any one of claims 1 to 9 in automotive engines.
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