CN114657006B - Lubricating oil composition for hybrid engine - Google Patents
Lubricating oil composition for hybrid engine Download PDFInfo
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- CN114657006B CN114657006B CN202011535033.8A CN202011535033A CN114657006B CN 114657006 B CN114657006 B CN 114657006B CN 202011535033 A CN202011535033 A CN 202011535033A CN 114657006 B CN114657006 B CN 114657006B
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- 239000000203 mixture Substances 0.000 title claims abstract description 61
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 42
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 22
- 229920000193 polymethacrylate Polymers 0.000 claims abstract description 19
- 239000003599 detergent Substances 0.000 claims abstract description 14
- 239000002199 base oil Substances 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- YGSDEFSMJLZEOE-UHFFFAOYSA-N Salicylic acid Natural products OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims abstract description 12
- -1 alkyl salicylic acid Chemical compound 0.000 claims abstract description 11
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229960004889 salicylic acid Drugs 0.000 claims abstract description 11
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract 3
- 239000002270 dispersing agent Substances 0.000 claims description 21
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 15
- 230000003078 antioxidant effect Effects 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 10
- 230000000994 depressogenic effect Effects 0.000 claims description 10
- 229960002317 succinimide Drugs 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229920002521 macromolecule Polymers 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 239000002530 phenolic antioxidant Substances 0.000 claims description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 5
- 239000013049 sediment Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 10
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 10
- 238000003756 stirring Methods 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- AVVIDTZRJBSXML-UHFFFAOYSA-L calcium;2-carboxyphenolate;dihydrate Chemical group O.O.[Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O AVVIDTZRJBSXML-UHFFFAOYSA-L 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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
- 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
-
- 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
- C10M2205/026—Butene
-
- 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
-
- 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
- C10M2207/128—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 containing hydroxy groups; Ethers 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
- 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
-
- 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
-
- 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
- C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
- C10M2215/28—Amides; Imides
-
- 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
-
- 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
-
- 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
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Landscapes
- 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 relates to the technical field of lubricating oil, in particular to a lubricating oil composition for a hybrid power engine. The hybrid engine lubricating oil composition includes, in addition to a neutral base oil, a polyisobutene of a specific structure, a comb-like polymethacrylate and an alkyl salicylic acid/sulfonic acid mixed matrix detergent. The invention improves the problem of high-temperature sediment increase caused by the accelerated thermal oxidation rate of the miniaturized engine of the hybrid electric vehicle, enhances the cleaning and dispersing performance of the lubricating oil, can form a durable lubricating oil film, avoids the problem of aggravation of abrasion of the hybrid electric vehicle caused by frequent start and stop, prolongs the service life of the lubricating oil, and can provide better lubricating oil protection for the engine.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to a lubricating oil composition for a hybrid power engine.
Background
Compared with common fuel, the engine structure of the non-plug-in hybrid electric vehicle has smaller structure, larger unit output power under the same load condition, larger output torque and increased abrasion degree, and the miniaturization of the structure brings the acceleration of the thermal oxidation rate of unit volume of engine oil and the increase of high-temperature sediments.
Compared with the engine working mode of a common fuel vehicle, the engine lubricating film cannot be well kept on the surface of engine parts in the starting and stopping stage, so that abrasion is generated due to poor lubrication at the moment of starting, the air-blow quantity can be greatly increased due to the aggravation of the abrasion, the generation of oil sludge and high-temperature sediments is increased, and the service life of engine oil is further shortened.
In summary, improving the antiwear properties and the detergent dispersibility of the non-plug-in hybrid engine oil has become an important issue for hybrid engine lubricating oils.
Disclosure of Invention
The invention mainly aims to solve the problems of insufficient wear resistance and high-temperature cleaning dispersibility caused by the structure and the working characteristics of the existing non-plug-in hybrid power engine lubricating oil, prolong the service life of the lubricating oil and provide better lubricating oil protection for an engine.
To achieve the above object, the present invention provides a hybrid engine lubricating oil composition comprising a neutral base oil, further comprising 0.5 to 2% polyisobutylene, 1.5 to 4.2% comb polymethacrylate, and 2.0 to 5.0% alkylsalicylic acid/sulfonic acid mixed matrix detergent, based on the total weight of the composition;
wherein the viscosity index of the neutral base oil is more than 120, and the neutral base oil is 50N-500N class III or more than class III; the 50N-500N is a base oil having a Saiki viscosity (seconds) of 50 cSt-500 cSt at 37.8deg.C (100 DEG F).
The polyisobutene has a number average molecular weight of 45000-50000 and a structure of:
polyisobutene (S)
Wherein R is 1 ，R 2 The same or different, each independently selected from the following three structures:
the number average molecular weight of the comb-shaped polymethacrylate is 10000-15000, and the structure is as follows:
wherein R3, R4, R5, R6 and R7 are the same or different and are each independently selected from the isomeric alkyl radicals with 20-50 carbon atoms;
according to the invention, the dosages of the polyisobutene and the comb-shaped polymethacrylate are determined and optimally selected, and different functional elements are introduced into the molecular design of the polyisobutene and the comb-shaped polymethacrylate serving as viscosity index improvers, so that a specific design function can be obtained, thereby inhibiting the generation of sediment and ensuring the corresponding viscosity-temperature performance.
The alkyl salicylic acid/sulfonic acid mixed matrix detergent has the structure that:
wherein R8 represents an isomeric alkyl group having 15 to 30 carbon atoms.
The invention ensures the high-temperature detergency and simultaneously further improves the antiwear performance by determining, optimizing, selecting and designing the dosage of the alkyl salicylic acid/sulfonic acid mixed matrix detergent dispersant, and can meet the special requirements of the hybrid electric vehicle.
Preferably, the composition further comprises 2-5% of a dispersant, based on the total weight of the composition; the content of the dispersant according to the present invention is preferably 3 to 5%.
The dispersant is any two or three of polyisobutylene succinimide ashless dispersant, boronated double polyisobutylene succinimide dispersant and macromolecule ashless dispersant.
Preferably, the ratio of the polyisobutene succinimide ashless dispersant in the composition is 1.5-2.5%, the ratio of the boronated bis-polyisobutene succinimide dispersant in the composition is 0-1.5%, and the ratio of the polymeric ashless dispersant in the composition is 0.3-2%.
Preferably, the composition further comprises 0.3 to 1.5% zinc dialkyldithiophosphate, based on the total weight of the composition; the zinc dialkyldithiophosphate content is preferably 0.5 to 1.2%. The zinc dialkyldithiophosphate is preferably zinc butyloctyldialkyldithiophosphate.
Preferably, the composition further comprises 0.5 to 4 percent of an antioxidant based on the total weight of the composition; preferably, the antioxidant is contained in an amount of 0.5 to 4%. The antioxidant is one or more selected from phenol type antioxidants and amine type antioxidants, and preferably has a weight ratio of 0.5: 2-2:0.5 of a mixture of a phenolic antioxidant and an amine antioxidant.
Preferably, the composition further comprises 0.2 to 0.5% of a pour point depressant, based on the total weight of the composition. The pour point depressant is one or two of polymethacrylate and poly-a-olefin, preferably polymethacrylate. The structure of the polymethacrylate is as follows:
among them, R9 is preferably a C10-C14 isopolyl group.
Preferably, the composition further comprises 0.01 to 10% (more preferably 0.1 to 2%) of a friction reducing agent, preferably molybdenum dialkyldithiophosphate, based on the total weight of the composition.
The invention adopts polyisobutene, comb-shaped polymethacrylate, salicylic acid/sulfonic acid mixed matrix detergent, dispersant, zinc dialkyl dithiophosphate, antioxidant, pour point depressant and neutral base oil to prepare the hybrid engine lubricating oil according to a specific proportion, and the proportion is properly selected to meet the use requirement of the hybrid engine lubricating oil due to reasonable addition amount, and the invention has good performance in particular in improving the cleaning dispersibility and the wear resistance.
As a preferred embodiment of the present invention, the composition comprises the following components in percentage by weight:
it is further preferred that the composition consists of the following ingredients in weight percent:
wherein the components may be combined according to the preferred definition of the invention.
Most preferably, the composition consists of the following components in percentage by weight: the components with the following weight percentage contents are:
the invention further provides a preparation method of the gas engine oil composition, which comprises the following steps:
mixing neutral base oil with polyisobutene, comb-shaped polymethacrylate and a pour point depressant at 35-60 ℃, uniformly stirring, adding a dispersing agent, an alkyl salicylic acid/sulfonic acid mixed matrix detergent, an antioxidant, a friction reducer and zinc dialkyl dithiophosphate, uniformly stirring, and thus obtaining the modified polyurethane foam.
Among them, the stirring time is preferably 2 to 3 hours.
The invention has the following beneficial effects:
the lubricating oil composition improves the problem of high-temperature sediment increase caused by the accelerated thermal oxidation rate of the miniaturized engine of the hybrid electric vehicle, enhances the cleaning and dispersing properties of the lubricating oil, can form a durable lubricating oil film, avoids the problem of aggravation of abrasion of the hybrid electric vehicle caused by frequent start and stop, prolongs the service life of the lubricating oil, and can provide better lubricating oil protection for the engine.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
To facilitate the comparison, the alkyl salicylic acid/sulfonic acid mixed matrix detergents used in the following examples all had the following structure:
wherein R8 represents an isomeric alkyl group having 15 carbon atoms.
Indeed, in many experiments, other structures mentioned in this invention also have similar or equivalent effects to those of the examples.
The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase by regular vendors without the manufacturer's attention.
Example 1: lubricating oil composition for hybrid engine
The composition comprises the following components in percentage by weight:
the preparation method comprises the following steps: mixing neutral base oil with polyisobutene, comb-shaped polymethacrylate and a pour point depressant at 35-60 ℃, uniformly stirring, adding a dispersing agent, an alkyl salicylic acid/sulfonic acid mixed matrix detergent, an antioxidant, a friction reducer and zinc dialkyl dithiophosphate, uniformly stirring, and thus obtaining the modified polyurethane foam. Among them, the stirring time is preferably 2 to 3 hours.
Example 2: lubricating oil composition for hybrid engine
The composition comprises the following components in percentage by weight:
the preparation method is the same as in example 1.
Example 3: lubricating oil composition for hybrid engine
The composition comprises the following components in percentage by weight:
II. And the balance of any composition of the neutral base oil of class III, IV and V50N-500N.
The preparation method is the same as in example 1.
Comparative example 1
Compared with example 1, the only difference is that: the polyisobutene and comb polymethacrylate were replaced with ethylene propylene copolymers.
Comparative example 2
Compared with example 1, the only difference is that: hydrogenated styrene-diene copolymers are used in place of the polyisobutene and polymethacrylate.
Comparative example 3
Compared with example 1, the only difference is that: the alkyl salicylic acid/sulfonic acid mixed matrix detergent is replaced with calcium sulfurized alkyl phenol.
Comparative example 4
Compared with example 1, the only difference is that: the alkyl salicylic acid/sulfonic acid mixed matrix detergent was replaced with calcium salicylate.
Test examples
The compositions obtained in each example and comparative example were subjected to performance tests according to the standard methods in the art, and the test results are shown in Table 1.
Wherein, the detection method of the kinematic viscosity refers to GB/T265;
SRV frictional wear test method referring to ASTM D5707;
the crankcase simulation test method refers to SH/T0300, and the oil temperature is 100 ℃; the plate temperature is 300 ℃; test time is 3h; intermittent.
Table 1: performance of lubricating oil compositions
As can be seen from Table 1, example 1 uses polyisobutylene and polymethacrylate over comparative example 1 using ethylene propylene copolymer and comparative example 2 using hydrogenated styrene-diene copolymer. Example 1 the antiwear performance of the detergent employing the alkyl salicylic acid/sulphonic acid mixed matrix is better than that of comparative example 3 employing calcium alkyl phenate sulphide and comparative example 4 employing calcium salicylate.
In addition, the present invention also conducted performance tests on the lubricating oil compositions of examples 2, 3, which were inferior in effect to example 1, but had significant advantages over comparative examples 1-4.
While the invention has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (14)
1. A hybrid engine lubricating oil composition comprising a neutral base oil, characterized by comprising, based on the total weight of the composition, 0.5-2% polyisobutylene, 1.5-4.2% comb polymethacrylate, 2.0-5.0% alkylsalicylic acid/sulfonic acid mixed matrix detergent, and 2-5.0% dispersant;
wherein the neutral base oil is class III base oil with a viscosity index of more than 120 and 50N-500N and more than class III base oil;
the polyisobutene has a number average molecular weight of 45000-50000 and a structure of:
wherein R is 1 ，R 2 The same or different, each independently selected from the following three structures:
the number average molecular weight of the comb-shaped polymethacrylate is 10000-15000, and the structure is as follows:
wherein R is 3 ，R 4 ，R 5 ，R 6 ，R 7 The same or different are respectively and independently selected from isomerism alkyl with 20-50 carbon atoms;
the alkyl salicylic acid/sulfonic acid mixed matrix detergent has the structure that:
wherein R is 8 Represents an isomeric alkyl group having 15 to 30 carbon atoms;
the dispersing agent is any two or three of polyisobutylene succinimide ashless dispersing agents, boron double polyisobutylene succinimide dispersing agents and macromolecule ashless dispersing agents; wherein the proportion of the polyisobutene succinimide ashless dispersant in the composition is 1.5-2.5%, the proportion of the boronated bis-polyisobutene succinimide dispersant in the composition is 0-1.5%, and the proportion of the polymer ashless dispersant in the composition is 0.3-2%.
2. The hybrid engine lubricating oil composition of claim 1, further comprising 0.3 to 1.5 percent zinc dialkyldithiophosphate, based on the total weight of the composition.
3. The hybrid engine lubricating oil composition of claim 1 or 2, further comprising 0.5 to 1.2% zinc dialkyldithiophosphate, based on the total weight of the composition.
4. The hybrid engine lubricating oil composition of claim 2, wherein the zinc dialkyldithiophosphate is zinc butyloctyl dialkyldithiophosphate.
5. The hybrid engine lubricating oil composition of claim 1 or 2, further comprising 0.5 to 4% of an antioxidant, based on the total weight of the composition; the antioxidant is one or more selected from phenol type antioxidants and amine type antioxidants.
6. The hybrid engine lubricating oil composition of claim 5, wherein the antioxidant is present in an amount of 0.5 by weight: 2-2:0.5 of a mixture of a phenolic antioxidant and an amine antioxidant.
7. The hybrid engine lubricating oil composition of any one of claims 1 or 2, further comprising 0.2 to 0.5% by weight, based on the total weight of the composition, of a pour point depressant, the pour point depressant being one or both of a polymethacrylate, a poly a-olefin.
8. The hybrid engine lubricating oil composition of claim 5, further comprising 0.2 to 0.5% by weight, based on the total weight of the composition, of a pour point depressant, the pour point depressant being one or both of a polymethacrylate, a poly a-olefin.
9. The hybrid engine lubricating oil composition of claim 7, wherein the pour point depressant is a polymethacrylate having the structure:
wherein R is 9 Is C10-C14 isomeric alkyl radical.
10. The hybrid engine lubricating oil composition of claim 7, further comprising 0.01 to 10 percent, based on the total weight of the composition, of a friction reducing agent.
11. The hybrid engine lubricating oil composition of claim 10, wherein the friction reducer is molybdenum dialkyldithiophosphate.
12. The hybrid engine lubricating oil composition according to claim 1 or 2, characterized by being composed of the following components in weight percentage:
13. the hybrid engine lubricating oil composition of claim 12, consisting of the following components in weight percent:
14. the hybrid engine lubricating oil composition of claim 12, consisting of the following components in weight percent:
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