Lubricating oil additive and lubricating oil

Abstract

The present invention provides a lubricating oil additive and lubricating oil. The lubricating oil additive of the present invention comprises, by mass percentage, 1.5-3% of detergent; 50-80% of dispersant; 3.5-5% of antiwear agent; 2%-10% of ionic liquid; 5%-6% of antioxidant; 1%-2% of rust inhibitor; 0.1%-0.6% of metal passivator; and the rest is base oil; wherein the ionic liquid comprises a structure of formula 1: wherein n is a positive integer selected from 4-9. The lubricating oil additive of the present invention can have relatively good antiwear, anticorrosion, fluidity, stability and environmental friendliness.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oils, and in particular to a lubricating oil additive and lubricating oil. Background Art

[0002] At present, the development of new energy vehicles around the world is mainly focused on pure electric vehicles and hybrid vehicles. In addition to the lubrication, cooling, power transmission and other functions of traditional automatic transmission oils, electric vehicle gearbox oils also need to have gear and bearing protection performance, electrochemical properties, copper corrosion performance and material compatibility under high-speed motors. The performance of lubricant additives directly affects the performance of gearbox oils.

[0003] Therefore, there is an urgent need to prepare a lubricating oil additive that has relatively good anti-wear, anti-corrosion, fluidity, stability and environmental friendliness. Summary of the invention

[0004] The invention provides a lubricating oil additive, which can have relatively excellent anti-wear property, anti-corrosion property, fluidity, stability and environmental friendliness.

[0005] The present invention provides a lubricating oil, which comprises the lubricating oil additive and thus has not only relatively excellent anti-wear properties, fluidity, corrosion resistance and stability, but also relatively excellent environmental protection properties.

[0006] The present invention provides a lubricating oil additive, which comprises, by mass percentage:

[0007]

[0008]

[0009] The rest is base oil;

[0010] Wherein, the ionic liquid comprises the following structure:

[0011]

[0012] Wherein, n is a positive integer selected from 4-9.

[0013] The lubricating oil additive as described above, wherein the content by mass percentage includes:

[0014]

[0015] The rest is base oil.

[0016] The lubricating oil additive as described above, wherein the detergent comprises sulfonate and / or phenate.

[0017] The lubricating oil additive as described above, wherein the dispersant comprises monosuccinimide and / or boronated succinimide.

[0018] The lubricating oil additive as described above, wherein the antiwear agent is selected from at least one of butyl triphenyl thiophosphate, dibutyl lead dithiocarbamate and dialkyl dithiophosphate.

[0019] The lubricating oil additive as described above, wherein the antioxidant comprises octyl / pentyl diphenylamine and / or octyl substituted diphenylamine.

[0020] The lubricating oil additive as described above, wherein the rust inhibitor is at least one selected from barium dinonylnaphthalenesulfonate, dodecenylsuccinic acid and N,N'-bis(phenylpropanotriazole methylene) laurylamine.

[0021] The lubricating oil additive as described above, wherein the metal deactivator comprises tolyltriazole derivatives and / or thiadiazole derivatives.

[0022] The lubricating oil additive as described above, wherein the base oil is a Group II base oil.

[0023] The present invention also provides a lubricating oil, comprising the lubricating oil additive as described above.

[0024] The present invention provides a lubricating oil additive, which includes a specific content of ionic liquid, a detergent, a dispersant, an anti-wear agent, an antioxidant, a rust inhibitor, a metal passivator and a base oil, wherein the ionic liquid includes an imidazolium cation and a carboxylic acid anion. Since the ionic liquid constituting the lubricating oil additive includes the imidazolium cation and the carboxylic acid anion, the lubricating oil additive has relatively excellent anti-wear, corrosion resistance and stability; and the ionic liquid also has the advantage of excellent solubility, and can be relatively well compatible with other components, further improving the anti-wear, fluidity, corrosion resistance and stability of the lubricating oil additive. It is worth mentioning that the ionic liquid does not contain sulfur and phosphorus elements. The use of the ionic liquid can reduce the sulfur and phosphorus elements in the lubricating oil additive as much as possible, so the environmental performance of the lubricating oil additive can be improved.

[0025] The lubricating oil of the present invention, because it includes the above-mentioned lubricating oil additive, not only has relatively excellent anti-wear properties, fluidity, corrosion resistance and stability, but also has good environmental protection and has relatively broad application prospects. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The first aspect of the present invention provides a lubricating oil additive, comprising, by mass percentage:

[0028]

[0029] The rest is base oil;

[0030] Among them, the ionic liquid includes the following structure:

[0031]

[0032] Wherein, n is a positive integer selected from 4-9.

[0033] The present invention does not limit the specific source of the ionic liquid. The ionic liquid can be prepared by a preparation method commonly used in the art, or it can be purchased commercially.

[0034] Furthermore, when the structural formula of the ionic liquid is

[0035] The prepared lubricant additive has better fluidity, anti-wear, anti-corrosion, stability and environmental protection performance.

[0036] The present invention does not particularly limit the detergent, dispersant, antiwear agent, antioxidant, rust inhibitor, metal passivator and base oil, and can be selected from the detergents, dispersants, antiwear agents, antioxidants, rust inhibitors, metal passivators and base oils commonly used in the art.

[0037] In the present invention, the ionic liquid includes imidazolium cations and carboxylic acid anions. The lubricating oil additive is prepared by using the ionic liquid, which can improve the wear resistance and stability of the lubricating oil additive, and the ionic liquid can passivate the metal activity and improve the anti-corrosion performance of the lubricating oil additive; the ionic liquid also has the advantage of excellent solubility, is a good solvent, and can be relatively well compatible with other components, further improving the fluidity, wear resistance, stability and anti-corrosion performance of the lubricating oil additive.

[0038] The ionic liquid of the present invention does not contain sulfur and phosphorus elements and is a green and environmentally friendly solvent. The use of the ionic liquid can reduce the sulfur and phosphorus elements in the lubricating oil additive as much as possible, so the lubricating oil additive of the present invention also has excellent environmental performance.

[0039] Furthermore, when the lubricating oil additive comprises, by mass percentage:

[0040]

[0041]

[0042] When the rest is base oil, the lubricant additive has more excellent anti-wear, anti-corrosion and stability.

[0043] In the present invention, the raw materials of detergent, dispersant, anti-wear agent, antioxidant, rust inhibitor, metal passivator and base oil can be further selected to further improve the compatibility of each raw material and improve the fluidity, anti-wear, anti-corrosion, stability and environmental performance of the lubricating oil additive.

[0044] In some embodiments of the present invention, the detergent comprises sulfonate and / or phenate. The sulfonate may be a high-based sulfonate, and the phenate may be a high-based phenate.

[0045] In some embodiments of the present invention, the dispersant comprises monosuccinimide and / or boronated succinimide.

[0046] In some embodiments of the present invention, the antiwear agent may be an extreme pressure antiwear agent, and the extreme pressure antiwear agent may be selected from at least one of butyl triphenyl thiophosphate, dibutyl lead dithiocarbamate and dialkyl dithiophosphate.

[0047] In some embodiments of the present invention, the antioxidant comprises octyl / pentyl diphenylamine and / or octyl substituted diphenylamine.

[0048] In the present invention, octyl / pentyl diphenylamine is a mixture of octyl-substituted diphenylamine and pentyl-substituted diphenylamine, and the present invention does not limit the mass ratio of octyl-substituted diphenylamine and pentyl-substituted diphenylamine. Octyl-substituted diphenylamine refers to a compound formed by octyl replacing the hydrogen atom on the benzene ring, and pentyl-substituted diphenylamine refers to a compound formed by pentyl replacing the hydrogen atom on the benzene ring.

[0049] In some embodiments of the present invention, the rust inhibitor is selected from at least one of barium dinonylnaphthalenesulfonate, dodecenylsuccinic acid and N,N'-bis(phenylpropanetriazolemethylene)laurylamine.

[0050] In the present invention, the use of the above-mentioned rust inhibitor can enable the lubricating oil additive to better form an adsorption film on the metal surface, inhibit the contact of the metal with water and oxygen, reduce the rust of the metal, and further improve the rust prevention performance of the lubricating oil additive.

[0051] In some embodiments of the present invention, the metal passivator includes tolyltriazole derivatives and / or thiadiazole derivatives. When the metal passivator includes the above substances, the obtained lubricating oil additive can better form a chemical protective film on the metal surface, prevent the metal from becoming ions, and then prevent the metal ions from catalytically oxidizing the oil, thereby extending the service life of the lubricating oil additive. In addition, the formed chemical protective film can also prevent sulfur and organic acids from corroding the metal, thereby improving the anti-corrosion ability of the lubricating oil additive.

[0052] In some embodiments of the present invention, the base oil is a Group II base oil.

[0053] The lubricating oil additive in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0054] The lubricating oil additive of the present invention not only has relatively excellent fluidity, anti-wear property, anti-corrosion property, stability and environmental protection performance, but also has simple preparation process, is easy to operate and has a wide range of applications.

[0055] A second aspect of the present invention provides a lubricating oil comprising the above-mentioned lubricating oil additive.

[0056] In the present invention, a certain amount of lubricating oil additive is mixed with a base oil to obtain a lubricating oil. The present invention does not particularly limit the base oil, and it can be a base oil commonly used in the art, for example, the base oil can be at least one of a Class I base oil, a Class II base oil, and a Class III base oil. In a specific embodiment, the base oil is a mixture of a Class II base oil and a Class III base oil.

[0057] Since the lubricant includes the above lubricant additive, the lubricant has excellent anti-wear, anti-corrosion, stability and environmental protection performance. When used in the electric vehicle reduction box system, it can prevent metal corrosion and has excellent protection for gears and bearings. In addition, the lubricant has excellent low-temperature fluidity, can meet the lubrication requirements of the reduction box system under the water-cooled motor structure, and has a wide range of application prospects.

[0058] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0059] The structural formula of the ionic liquid in each embodiment is

[0060]

[0061] Wherein, n is a positive integer selected from 4 to 9 and is obtained through commercial purchase;

[0062] The sulfonate in each embodiment and comparative example is calcium sulfonate, model number is HiTEC611;

[0063] The tolyltriazole derivative in each embodiment and comparative example is IR39;

[0064] The Class II base oil in each embodiment and comparative example is HVIH3, purchased from SK, South Korea;

[0065] The thiadiazole derivative in each example and comparative example is T561;

[0066] The salicylate in each embodiment and comparative example is C9375;

[0067] The Class III base oil in each embodiment and comparative example is VHVI6, purchased from SK, South Korea;

[0068] The octyl / pentyl diphenylamine in each embodiment and comparative example is L57;

[0069] The dibutyl lead dithiocarbamate in each embodiment and comparative example is T353.

[0070] Example 1

[0071] The composition of the lubricating oil additive of this embodiment is shown in Table 1:

[0072] Table 1

[0073] name Mass percentage / % Sulfonate 2.0 Monosuccinimide 70 Dibutyl lead dithiocarbamate 4.5 Ionic liquid (n=4) 3.0 Dodecenylsuccinic acid 1.0 Octyl / pentyl diphenylamine 5.0 Tolyltriazole derivatives 0.2 Group II base oil 14.3

[0074] Example 2

[0075] The composition of the lubricating oil additive of this embodiment is shown in Table 2:

[0076] Table 2

[0077] name Mass percentage / % Sulfonate 2.3 Boronated Succinimide 79.2 Dialkyl dithiophosphates 3.5 Ionic liquid (n=6) 2.5 Barium dinonylnaphthalenesulfonate 1.8 Octyl / pentyl diphenylamine 5.7 Thiadiazole derivatives 0.6 Group II base oil 4.4

[0078] Example 3

[0079] The composition of the lubricating oil additive of this embodiment is shown in Table 3:

[0080] Table 3

[0081] name Mass percentage / % Salicylates 3.0 Boronated Succinimide 67.5 Butyl triphenyl phosphorothioate 5.0 Ionic liquid (n=7) 10 N,N'-Bis(phenylpropanotriazolemethylene)laurylamine 1.5 Octyl substituted diphenylamine 6.0 Tolyltriazole derivatives 0.5 Group II base oil 6.5

[0082] Example 4

[0083] The composition of the lubricating oil additive of this embodiment is shown in Table 4:

[0084] Table 4

[0085] name Mass percentage / % Salicylates 1.5 Boronated Succinimide 65.4 Butyl triphenyl phosphorothioate 4.5 Ionic liquid (n=9) 9 N,N'-Bis(phenylpropanotriazolemethylene)laurylamine 1.2 Octyl substituted diphenylamine 5.5 Tolyltriazole derivatives 0.3 Group II base oil 12.6

[0086] Example 5

[0087] The composition of the lubricating oil additive of this embodiment is shown in Table 5:

[0088] Table 5

[0089]

[0090]

[0091] Example 6

[0092] The lubricating oil in this embodiment is obtained by mixing the lubricating oil additive in Embodiment 1 with a Class III base oil and a Class II base oil respectively;

[0093] Among them, based on the total mass of the lubricant, the mass percentage of the lubricant additive is 6.55%, the mass percentage of the Group II base oil is 45%, the mass percentage of the Group III base oil is 42.95%, and the mass percentage of the viscosity index improver V1010 is 5.5%.

[0094] Example 7

[0095] The lubricating oil in this embodiment is basically the same as that in Embodiment 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 2.

[0096] Example 8

[0097] The lubricating oil in this embodiment is basically the same as that in Embodiment 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 3.

[0098] Example 9

[0099] The lubricating oil in this embodiment is basically the same as that in Embodiment 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 4.

[0100] Example 10

[0101] The lubricating oil in this embodiment is basically the same as that in Embodiment 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 5.

[0102] Comparative Example 1

[0103] The composition of the lubricating oil additive of this embodiment is shown in Table 6:

[0104] Table 6

[0105] name Mass percentage / % Sulfonate 2.0 Monosuccinimide 70 Dibutyl lead dithiocarbamate 4.5 Dodecenylsuccinic acid 1.0 Octyl / pentyl diphenylamine 5.0 Tolyltriazole derivatives 0.2 Group II base oil 17.3

[0106] Comparative Example 2

[0107] The composition of the lubricating oil additive of this embodiment is shown in Table 7:

[0108] Table 7

[0109] name Mass percentage / % Sulfonate 1.0 Monosuccinimide 49 Dibutyl lead dithiocarbamate 3.0 Ionic liquid (n=4) 20 Dodecenylsuccinic acid 2.1 Octyl / pentyl diphenylamine 4.8 Tolyltriazole derivatives 0.8 Group II base oil 19.3

[0110] Comparative Example 3

[0111] The lubricating oil in this comparative example is basically the same as that in Example 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Comparative Example 1.

[0112] Comparative Example 4

[0113] The lubricating oil in this comparative example is basically the same as that in Example 6, the only difference being that the lubricating oil additive is the lubricating oil additive in Comparative Example 2.

[0114] Performance Characterization

[0115] 1. The lubricating oils in Examples 6-10 and Comparative Examples 3-4 were subjected to performance tests. The test results are shown in Table 8.

[0116] Table 8

[0117]

[0118]

[0119] It can be seen from Table 8 that the lubricating oil of the embodiment of the present invention has excellent anti-wear, fluidity, corrosion resistance and stability, and has a relatively broad application prospect.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lubricating oil additive, characterized in that: According to the mass percentage, it includes: The rest is base oil; Wherein, the ionic liquid comprises the following structure: The dispersant includes monosuccinimide and / or boronated succinimide; The anti-wear agent is selected from at least one of butyl triphenyl thiophosphate, dibutyl lead dithiocarbamate and dialkyl dithiophosphate; The antioxidant includes octyl / pentyl diphenylamine and / or octyl substituted diphenylamine; The rust inhibitor is selected from at least one of barium dinonylnaphthalenesulfonate, dodecenylsuccinic acid and N,N'-bis(phenylpropanetriazole methylene) laurylamine.

2. The lubricating oil additive according to claim 1, characterized in that: The detergent includes sulfonates and / or phenates.

3. The lubricating oil additive according to claim 1, characterized in that The metal deactivator includes tolyltriazole derivatives and / or thiadiazole derivatives.

4. The lubricating oil additive according to claim 1, characterized in that The base oil is a Group II base oil.

5. A lubricating oil, characterized in that: The lubricating oil additive comprises the lubricating oil additive according to any one of claims 1 to 4.

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