High-temperature-resistant lubricating oil and preparation method thereof

Abstract

The present application relates to the technical field of lubricating oil, and proposes a high-temperature-resistant lubricating oil and a preparation method thereof, which comprises the following components in parts by weight: 85-95 parts of base oil, 2-6 parts of dispersant, 2-5 parts of antioxidant, 1-3 parts of antirust agent, and 0.02-0.04 parts of solid lubricant; the dispersant comprises p-phenylphenol and 3-hydroxytridecanoic acid in a mass ratio of 1:9-9:1. The above technical solution solves the problem of poor high-temperature resistance of the lubricating oil in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubricating oil, in particular to a high-temperature-resistant lubricating oil and a preparation method thereof. BACKGROUND

[0002] Lubricating oil is widely used in mechanical equipment, reducing the friction of the device contact surface to reduce the wear of the equipment, thereby prolonging the service life of the equipment and reducing the economic cost. A large amount of heat is generated during the operation of the mechanical equipment, so that the working environment temperature of the lubricating oil is increased. However, the existing lubricating oil has poor high-temperature dispersion and other reasons, and does not have excellent high-temperature resistance. The lubricating property at high temperature is poor, and cannot meet the working requirements in high-temperature environment. Therefore, it is crucial to research a high-temperature-resistant lubricating oil. SUMMARY

[0003] The present application provides a high-temperature-resistant lubricating oil and a preparation method thereof, which solves the problem of poor high-temperature resistance of the lubricating oil in the related art.

[0004] The technical scheme of the present application is as follows:

[0005] The present application provides a high-temperature-resistant lubricating oil, which comprises the following components by weight: 85-95 parts of base oil, 2-6 parts of dispersant, 2-5 parts of antioxidant, 1-3 parts of anti-rust agent, and 0.02-0.04 parts of solid lubricant. The dispersant comprises p-phenylphenol and 3-hydroxytridecanoic acid in a mass ratio of 1:9-9:1.

[0006] As a further technical scheme, the mass ratio of the p-phenylphenol and the 3-hydroxytridecanoic acid is 1:3-3:1.

[0007] The present application limits the mass ratio of the p-phenylphenol and the 3-hydroxytridecanoic acid to 1:3-3:1, which further enhances the high-temperature resistance of the high-temperature-resistant lubricating oil.

[0008] As a further technical scheme, the solid lubricant comprises graphite and Ti3AlC2 in a mass ratio of 1:9-9:1.

[0009] The present application limits the solid lubricant to be graphite and Ti3AlC2 in a mass ratio of 1:9-9:1, which further enhances the high-temperature resistance of the high-temperature-resistant lubricating oil.

[0010] As a further technical scheme, the preparation method of the solid lubricant comprises the following steps:

[0011] The graphite and Ti3AlC2 are mixed uniformly and ground to obtain the solid lubricant.

[0012] The application adopts the method of uniformly mixing and grinding graphite and Ti3AlC2 to prepare a solid lubricant, and further enhances the high temperature resistance of the high temperature resistant lubricating oil.

[0013] As a further technical solution, the mass of the graphite is greater than the mass of the Ti3AlC2.

[0014] The application further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the mass of the graphite to be greater than the mass of the Ti3AlC2.

[0015] As a further technical solution, the mass ratio of the graphite to the Ti3AlC2 is 7:3 to 6:4.

[0016] The application further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the mass ratio of the graphite to the Ti3AlC2 to be 7:3 to 6:4.

[0017] As a further technical solution, the particle size of the graphite is 100 nm.

[0018] As a further technical solution, the particle size of the Ti3AlC2 is 10 microns.

[0019] As a further technical solution, the antioxidant includes one or both of 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0020] As a further technical solution, the base oil includes one or more of silicone oil, polyalphaolefin, and diisooctyl sebacate.

[0021] As a further technical solution, the rust inhibitor includes one or more of T701, T705, and T746.

[0022] The application proposes a preparation method of a high temperature resistant lubricating oil, including the following steps:

[0023] The base oil is heated to 50-60 DEG C, and the dispersant, antioxidant, rust inhibitor and solid lubricant are uniformly mixed, heat preserved, and cooled to obtain the high temperature resistant lubricating oil.

[0024] The working principle and beneficial effects of the application are as follows:

[0025] In the present application, p-phenylphenol and 3-hydroxytridecanoic acid are used as a dispersant for high-temperature-resistant lubricating oil, both of which are lipophilic and hydrophilic compounds, and the benzene ring structure of p-phenylphenol has good high-temperature stability. By using 3-hydroxytridecanoic acid, the dispersant in the lubricating oil can better exert its effect, so that the use of p-phenylphenol and 3-hydroxytridecanoic acid enhances the high-temperature resistance of the dispersant and the dispersibility of the solid lubricant in the lubricating oil, thereby enhancing the high-temperature resistance of the lubricating oil. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] In the following examples and comparative examples, the parameters of the raw materials are as follows:

[0028] The particle size of the graphite is 100 nm;

[0029] The particle size of Ti3AlC2 is 10 microns;

[0030] The viscosity index of polyalphaolefin is 145, and the kinematic viscosity (40 DEG C) is 51 mm 2 / s.

[0031] Example 1

[0032] A lubricating oil, a preparation method thereof, comprising the following steps:

[0033] S1, uniformly mix 45 parts of silicone oil and 40 parts of polyalphaolefin, heat to 50 DEG C, to obtain a base oil;

[0034] S2, while stirring, add 0.2 parts of p-phenylphenol, 1.8 parts of 3-hydroxytridecanoic acid, 2 parts of 4,4'-methylenebis(2,6-di-tert-butylphenol), 1 part of T746 and 0.02 parts of graphite to the base oil, and heat for 2 hours. Cool to room temperature and stop stirring to obtain a lubricating oil.

[0035] Example 2

[0036] A lubricating oil, a preparation method thereof, comprising the following steps:

[0037] S1, uniformly mix 45 parts of silicone oil and 40 parts of polyalphaolefin, heat to 50 DEG C, to obtain a base oil;

[0038] S2, while stirring, p-phenylphenol 1.5 parts, 3-hydroxytridecanoic acid 0.5 parts, 4,4'-methylenebis(2,6-di-tert-butylphenol) 2 parts, T746 1 part, graphite 0.002 parts, Ti3AlC2 0.018 parts are added into the base oil, heat preservation 2h, cool to room temperature and stop stirring, to get lubricating oil.

[0039] Example 3

[0040] The difference from Example 1 is only that p-phenylphenol 1.8 parts, 3-hydroxytridecanoic acid 0.2 parts.

[0041] Example 4

[0042] The difference from Example 1 is only that p-phenylphenol 0.5 parts, 3-hydroxytridecanoic acid 1.5 parts.

[0043] Example 5

[0044] The difference from Example 1 is only that p-phenylphenol 1.5 parts, 3-hydroxytridecanoic acid 0.5 parts.

[0045] Example 6

[0046] A lubricating oil, the preparation method thereof, comprising the following steps:

[0047] S1, the silicon oil 45 parts, poly-alpha olefin 40 parts are mixed uniformly, heated to 50℃, to get base oil;

[0048] S2, while stirring, p-phenylphenol 1.5 parts, 3-hydroxytridecanoic acid 0.5 parts, 4,4'-methylenebis(2,6-di-tert-butylphenol) 2 parts, T746 1 part, graphite 0.002 parts, Ti3AlC2 0.018 parts are added into the base oil, heat preservation 2h, cool to room temperature and stop stirring, to get lubricating oil.

[0049] Example 7

[0050] A lubricating oil, the preparation method thereof, comprising the following steps:

[0051] S1, the graphite 1 parts, Ti3AlC2 9 parts are mixed uniformly, then grinded under the rotation speed of 400r / min ball mill for 20min, to get solid lubricant;

[0052] S2, the silicon oil 45 parts, poly-alpha olefin 40 parts are mixed uniformly, heated to 50℃, to get base oil;

[0053] S3, while stirring, p-phenylphenol 1.5 parts, 3-hydroxytridecanoic acid 0.5 parts, 4,4'-methylenebis(2,6-di-tert-butylphenol) 2 parts, T746 1 part, solid lubricant 0.02 parts are added into the base oil, heat preservation 2h, cool to room temperature and stop stirring, to get lubricating oil.

[0054] Example 8

[0055] The difference from Example 7 is only that graphite 5 parts, Ti3AlC2 5 parts.

[0056] Example 9

[0057] The difference from Example 7 is only that graphite 9 parts, Ti3AlC2 21 parts.

[0058] Example 10

[0059] The difference from Example 7 is only that graphite 6 parts, Ti3AlC2 4 parts.

[0060] Example 11

[0061] The difference from Example 7 is only that graphite 7 parts, Ti3AlC2 3 parts.

[0062] Comparative Example 1

[0063] A lubricating oil, a preparation method thereof, comprising the following steps:

[0064] S1, mix silicon oil 45 parts, poly-alpha olefin 40 parts uniformly, heat to 50℃, to obtain base oil;

[0065] S2, while stirring, add p-phenylphenol 2 parts, 4,4'-methylenebis(2,6-di-tert-butylphenol) 2 parts, T746 1 part and graphite 0.02 parts in the base oil, keep warm for 2h, cool to room temperature and stop stirring, to obtain lubricating oil.

[0066] Comparative Example 2

[0067] A lubricating oil, a preparation method thereof, comprising the following steps:

[0068] S1, mix silicon oil 45 parts, poly-alpha olefin 40 parts uniformly, heat to 50℃, to obtain base oil;

[0069] S2, while stirring, add 3-hydroxytridecanoic acid 2 parts, 4,4'-methylenebis(2,6-di-tert-butylphenol) 2 parts, T746 1 part and graphite 0.02 parts in the base oil, keep warm for 2h, cool to room temperature and stop stirring, to obtain lubricating oil.

[0070] Test Example

[0071] The lubricating oils prepared in Examples 1-11 and Comparative Examples 1-2 were tested for performance according to the following test methods, and the results are shown in Table 1.

[0072] High temperature treatment is used to evaluate dispersion stability: the lubricating oil is placed in an oven at 120℃ for 10 days, and after taking out, it is observed whether there is precipitation.

[0073] The maximum no-seizure load value is used to evaluate the high temperature resistance: the maximum no-seizure load value N of the lubricating oil prepared from examples 1-11 and comparative examples 1-2 without high temperature treatment and after high temperature treatment (200℃, 250h) is tested according to the test method in GB / T 3142-2019.

[0074] Table 1 Performance test results of the lubricating oil of examples 1-11 and comparative examples 1-2

[0075]

[0076] The dispersant of comparative example 1 is p-phenylphenol, the dispersant of comparative example 2 is 3-hydroxytridecanoic acid, and the dispersant of example 1 is a combination of p-phenylphenol and 3-hydroxytridecanoic acid. The results show that the maximum no-seizure load value of the lubricating oil prepared from example 1 without high temperature treatment is greater than that of comparative examples 1 and 2, and the change rate of the maximum no-seizure load value of the lubricating oil prepared from example 1 after high temperature treatment is smaller than that of comparative examples 1 and 2, indicating that the combination of p-phenylphenol and 3-hydroxytridecanoic acid in the lubricating oil synergistically enhances the lubricity and high temperature resistance of the lubricating oil.

[0077] The maximum no-seizure load value of the lubricating oil prepared from examples 4-5 without high temperature treatment is greater than that of examples 1 and 3, and the change rate of the maximum no-seizure load value of the lubricating oil prepared from examples 4-5 after high temperature treatment is smaller than that of examples 1 and 3, indicating that when the mass ratio of p-phenylphenol to 3-hydroxytridecanoic acid in the lubricating oil is 1:3-3:1, the lubricity and high temperature resistance of the lubricating oil can be further improved.

[0078] Compared with example 5, the solid lubricant in the lubricating oil prepared from examples 6-11 is a combination of graphite and Ti3AlC2. The results show that the maximum no-seizure load value of the lubricating oil prepared from examples 6-11 without high temperature treatment is greater than that of example 5, and the change rate of the maximum no-seizure load value of the lubricating oil prepared from examples 6-11 after high temperature treatment is smaller than that of example 5, indicating that the combination of graphite and Ti3AlC2 further synergistically enhances the lubricity and high temperature resistance of the lubricating oil.

[0079] The maximum no-seizure load value of the lubricating oil prepared from example 7 without high temperature treatment is greater than that of example 6, and the change rate of the maximum no-seizure load value of the lubricating oil prepared from example 7 after high temperature treatment is smaller than that of example 6, indicating that the high temperature resistance of the lubricating oil is further enhanced after the graphite and Ti3AlC2 are ground first.

[0080] The maximum non-seizure load value of the lubricating oil prepared in examples 8-11 without high temperature treatment is greater than that of example 7, the change rate of the maximum non-seizure load value of the lubricating oil prepared in examples 8-11 after high temperature treatment is smaller than that of example 7, which indicates that the quality of the graphite ≥ the quality of Ti3AlC2 further enhances the lubricity and high temperature resistance of the lubricating oil.

[0081] The maximum non-seizure load value of the lubricating oil prepared in examples 10-11 without high temperature treatment is greater than that of examples 8-9, the change rate of the maximum non-seizure load value of the lubricating oil prepared in examples 10-11 after high temperature treatment is smaller than that of examples 8-9, which indicates that by limiting the mass ratio of the graphite and Ti3AlC2 to 7:3-6:4, the high temperature resistance of the lubricating oil is further enhanced.

[0082] The above only is the preferred embodiment of the present application, and does not use to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high temperature resistant lubricating oil, characterized by, The lubricating oil comprises the following components in parts by weight: base oil 85-95 parts, dispersant 2-6 parts, antioxidant 2-5 parts, anti-rust agent 1-3 parts, and solid lubricant 0.02-0.04 parts, wherein the dispersant comprises p-phenylphenol and 3-hydroxytridecanoic acid in a mass ratio of 1:3-3:1; The preparation method of the solid lubricant comprises the following steps: The graphite and Ti3AlC2 are uniformly mixed and ground to obtain the solid lubricant. The mass of the graphite is greater than the mass of Ti3AlC2.

2. The high temperature resistant lubricating oil according to claim 1, wherein The mass ratio of the graphite to Ti3AlC2 is 7:3-6:

4.

3. The high temperature resistant lubricating oil of claim 1, wherein, The particle size of the graphite is 100 nm.

4. The high temperature resistant lubricating oil of claim 1, wherein, The particle size of the Ti3AlC2 is 10 μm.

5. The high temperature resistant lubricating oil of claim 1, wherein, The antioxidant comprises one or both of 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

6. The method for preparing high-temperature resistant lubricating oil according to any one of claims 1-5, characterized in that, The method comprises the following steps: The base oil is heated to 50-60 DEG C, the dispersant, antioxidant, anti-rust agent and solid lubricant are added and uniformly mixed, and then the mixture is kept warm and cooled to obtain the high-temperature-resistant lubricating oil.

Images