High-temperature-resistant lubricating oil and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil, and provides high-temperature-resistant lubricating oil and a preparation method thereof.The high-temperature-resistant lubricating oil is prepared from, by weight, 85-95 parts of base oil, 2-6 parts of dispersing agent, 2-5 parts of antioxidant, 1-3 parts of antirust agent and 0.02-0.04 part of solid lubricant, and the dispersing agent is prepared from p-phenylphenol and 3-hydroxytridecanoic acid according to the mass ratio of 1: 9-9: 1. Through the technical scheme, the problem of poor high temperature resistance of lubricating oil in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oils, and in particular to a high temperature resistant lubricating oil and a preparation method thereof. Background Art

[0002] Lubricating oil is widely used in mechanical equipment. It reduces the wear of equipment by reducing the friction of the contact surface of the device, thereby extending the life of the equipment and reducing economic costs. Mechanical equipment will generate a lot of heat during operation, which will increase the working environment temperature of the lubricating oil. However, due to poor high-temperature dispersibility and other reasons, the existing lubricating oil does not have excellent high-temperature resistance and has poor lubricity at high temperatures, which cannot meet the working requirements of high-temperature environments. Therefore, it is very important to develop a high-temperature resistant lubricating oil. Summary of the invention

[0003] The present invention 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 solution of the present invention is as follows: The present invention provides a high temperature resistant lubricating oil, comprising 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 rust inhibitor, and 0.02-0.04 parts of solid lubricant, wherein the dispersant comprises p-phenylphenol and 3-hydroxytridecanoic acid in a mass ratio of 1:9-9:1.

[0005] As a further technical solution, the mass ratio of p-phenylphenol to 3-hydroxytridecanoic acid is 1:3~3:1.

[0006] The invention further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the mass ratio of p-phenylphenol to 3-hydroxytridecanoic acid to 1:3-3:1.

[0007] As a further technical solution, the solid lubricant includes graphite and Ti3AlC2 in a mass ratio of 1:9 to 9:1.

[0008] The present invention further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the solid lubricant to graphite and Ti3AlC2 in a mass ratio of 1:9 to 9:1.

[0009] As a further technical solution, the preparation method of the solid lubricant comprises the following steps: Graphite and Ti3AlC2 are mixed uniformly and ground to obtain a solid lubricant.

[0010] The present invention adopts a method of uniformly mixing graphite and Ti3AlC2 and grinding them to prepare a solid lubricant, thereby further enhancing the high temperature resistance of the high temperature resistant lubricating oil.

[0011] As a further technical solution, the mass of the graphite is ≥ the mass of Ti3AlC2.

[0012] The present invention further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the mass of graphite to be greater than or equal to the mass of Ti3AlC2.

[0013] As a further technical solution, the mass ratio of graphite to Ti3AlC2 is 7:3~6:4.

[0014] The present invention further enhances the high temperature resistance of the high temperature resistant lubricating oil by limiting the mass ratio of graphite to Ti3AlC2 to 7:3-6:4.

[0015] As a further technical solution, the particle size of the graphite is 100 nm.

[0016] As a further technical solution, the particle size of the Ti3AlC2 is 10 μm.

[0017] As a further technical solution, the antioxidant includes one or two of 2,6-di-tert-butyl-p-methylphenol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0018] As a further technical solution, the base oil includes one or more of silicone oil, polyalphaolefin, and diisooctyl sebacate.

[0019] As a further technical solution, the rust inhibitor includes one or more of T701, T705, and T746.

[0020] The present invention provides a method for preparing a high temperature resistant lubricating oil, comprising the following steps: Heat the base oil to 50-60°C, add dispersant, antioxidant, rust inhibitor and solid lubricant, mix evenly, keep warm, and cool to obtain high temperature resistant lubricating oil.

[0021] The working principle and beneficial effects of the present invention are: In the present invention, p-phenylphenol and 3-hydroxytridecanoic acid are used in combination as a dispersant for high-temperature resistant lubricating oil. Both are lipophilic and hydrophilic compounds, and the benzene ring structure of p-phenylphenol has good high-temperature stability. By using it in combination with 3-hydroxytridecanoic acid, the dispersant in the lubricating oil can better exert its effect. Therefore, the combined 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

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0023] In the following examples and comparative examples, the parameters of the raw materials are as follows: The particle size of graphite is 100nm; The particle size of Ti3AlC2 is 10 μm; The viscosity index of polyalphaolefin is 145 and the kinematic viscosity (40°C) is 51 mm 2 / s.

[0024] Example 1 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 45 parts of silicone oil and 40 parts of polyalphaolefin evenly, and heat to 50° C. to obtain base oil; S2. 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 while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0025] Example 2 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 45 parts of silicone oil and 50 parts of polyalphaolefin evenly, and heat to 60° C. to obtain base oil; S2. Add 0.6 parts of p-phenylphenol, 5.4 parts of 3-hydroxytridecanoic acid, 5 parts of 2,6-di-tert-butyl-p-methylphenol, 3 parts of T701 and 0.04 parts of graphite to the base oil while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0026] Example 3 The only difference from Example 1 is: 1.8 parts of p-phenylphenol and 0.2 parts of 3-hydroxytridecanoic acid.

[0027] Example 4 The only difference from Example 1 is: 0.5 parts of p-phenylphenol and 1.5 parts of 3-hydroxytridecanoic acid.

[0028] Example 5 The only difference from Example 1 is: 1.5 parts of p-phenylphenol and 0.5 parts of 3-hydroxytridecanoic acid.

[0029] Example 6 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 45 parts of silicone oil and 40 parts of polyalphaolefin evenly, and heat to 50° C. to obtain base oil; S2. Add 1.5 parts of p-phenylphenol, 0.5 parts of 3-hydroxytridecanoic acid, 2 parts of 4,4'-methylenebis(2,6-di-tert-butylphenol), 1 part of T746, 0.002 parts of graphite and 0.018 parts of Ti3AlC2 to the base oil while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0030] Example 7 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 1 part of graphite and 9 parts of Ti3AlC2 evenly, and grind them at a ball mill speed of 400 r / min for 20 min to obtain a solid lubricant; S2, 45 parts of silicone oil and 40 parts of polyalphaolefin are mixed evenly, and heated to 50° C. to obtain a base oil; S3. Add 1.5 parts of p-phenylphenol, 0.5 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 solid lubricant to the base oil while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0031] Example 8 The only difference from Example 7 is: 5 parts of graphite and 25 parts of Ti3AlC2.

[0032] Example 9 The only difference from Example 7 is: 9 parts of graphite and 1 part of Ti3AlC2.

[0033] Example 10 The only difference from Example 7 is: 6 parts of graphite and 24 parts of Ti3AlC2.

[0034] Embodiment 11 The only difference from Example 7 is: 7 parts of graphite and 3 parts of Ti3AlC2.

[0035] Comparative Example 1 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 45 parts of silicone oil and 40 parts of polyalphaolefin evenly, and heat to 50° C. to obtain base oil; S2. Add 2 parts of p-phenylphenol, 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 while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0036] Comparative Example 2 A lubricating oil and a preparation method thereof, comprising the following steps: S1. Mix 45 parts of silicone oil and 40 parts of polyalphaolefin evenly, and heat to 50° C. to obtain base oil; S2. Add 2 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 while stirring, keep warm for 2 hours, cool to room temperature and stop stirring to obtain lubricating oil.

[0037] Test example The lubricating oils prepared in Examples 1 to 11 and Comparative Examples 1 to 2 were tested for performance according to the following test method. The results are shown in Table 1.

[0038] High temperature treatment is used to evaluate dispersion stability: the lubricating oil is placed in an oven at 120°C for 10 days and then taken out to observe whether there is any precipitation.

[0039] The maximum no-seizure load value is used to evaluate high temperature resistance: the maximum no-seizure load value N is tested for the lubricating oils prepared in Examples 1 to 11 and Comparative Examples 1 to 2 without high-temperature treatment and the lubricating oils after high-temperature treatment (200°C, 250h) with reference to the test method in GB / T 3142-2019.

[0040] Table 1 Performance test results of lubricating oils of Examples 1 to 11 and Comparative Examples 1 to 2

[0041] The dispersant in Comparative Example 1 is p-phenylphenol, the dispersant in Comparative Example 2 is 3-hydroxytridecanoic acid, and the dispersant in Example 1 is a compound of p-phenylphenol and 3-hydroxytridecanoic acid. As a result, the maximum no-seizure load value of the lubricating oil prepared in Example 1 without high-temperature treatment is larger than that of Comparative Example 1 and Comparative Example 2, and the change rate of the maximum no-seizure load value of the lubricating oil prepared in Example 1 after high-temperature treatment is smaller than that of Comparative Example 1 and Comparative Example 2, indicating that the dispersants p-phenylphenol and 3-hydroxytridecanoic acid in the lubricating oil synergistically enhance the lubricity and high temperature resistance of the lubricating oil.

[0042] The maximum no-seizure load value of the lubricating oil prepared in Examples 4 to 5 without high-temperature treatment is greater than that of Example 1 and Example 3, and the change rate of the maximum no-seizure load value of the lubricating oil prepared in Examples 4 to 5 after high-temperature treatment is smaller than that of Example 1 and Example 3, indicating that when the mass ratio of p-phenylphenol to 3-hydroxytridecanoic acid in the lubricating oil is 1:3 to 3:1, the lubricity and high temperature resistance of the lubricating oil can be further improved.

[0043] Compared with Example 5, the solid lubricant in the lubricating oil prepared in Examples 6 to 11 is a compound of graphite and Ti3AlC2. As a result, the maximum no-seizure load value of the lubricating oil prepared in Examples 6 to 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 in Examples 6 to 11 after high-temperature treatment is smaller than that of the example, indicating that graphite and Ti3AlC2 synergistically further enhance the lubricity and high temperature resistance of the lubricating oil.

[0044] The maximum no-seizure load value of the lubricating oil prepared in 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 in 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 grinding the graphite and Ti3AlC2.

[0045] The maximum no-seizure load value of the lubricating oil prepared in Examples 8 to 11 without high-temperature treatment is greater than that of Example 7, and the change rate of the maximum no-seizure load value of the lubricating oil prepared in Examples 8 to 11 after high-temperature treatment is smaller than that of Example 7, indicating that the quality of graphite ≥ the quality of Ti3AlC2 further enhances the lubricity and high temperature resistance of the lubricating oil.

[0046] The maximum no-seizure load value of the lubricating oil prepared in Examples 10-11 without high-temperature treatment is greater than that of Examples 8-9, and the change rate of the maximum no-seizure load value of the lubricating oil prepared in Examples 10-11 after high-temperature treatment is smaller than that of Examples 8-9, indicating that the high temperature resistance of the lubricating oil is further enhanced by limiting the mass ratio of graphite and Ti3AlC2 to 7:3-6:4.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant lubricating oil, characterized in that: The invention 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 rust inhibitor 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.

2. A high temperature resistant lubricating oil according to claim 1, characterized in that: The mass ratio of p-phenylphenol to 3-hydroxytridecanoic acid is 1:3 to 3:

1.

3. A high temperature resistant lubricating oil according to claim 1, characterized in that: The solid lubricant includes graphite and Ti3AlC2 in a mass ratio of 1:9 to 9:

1.

4. A high temperature resistant lubricating oil according to claim 3, characterized in that: The preparation method of the solid lubricant comprises the following steps: Graphite and Ti3AlC2 are mixed uniformly and ground to obtain a solid lubricant.

5. A high temperature resistant lubricating oil according to claim 4, characterized in that: The mass of the graphite is ≥ the mass of Ti3AlC2.

6. A high temperature resistant lubricating oil according to claim 5, characterized in that: The mass ratio of the graphite to Ti3AlC2 is 7:3~6:

4.

7. A high temperature resistant lubricating oil according to claim 3, characterized in that: The particle size of the graphite is 100 nm.

8. The high temperature resistant lubricating oil according to claim 3, characterized in that: The particle size of the Ti3AlC2 is 10 μm.

9. The high temperature resistant lubricating oil according to claim 1, characterized in that: The antioxidant includes one or two of 2,6-di-tert-butyl-p-methylphenol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

10. The method for preparing a high temperature resistant lubricating oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: Heat the base oil to 50-60°C, add dispersant, antioxidant, rust inhibitor and solid lubricant, mix evenly, keep warm, and cool to obtain high temperature resistant lubricating oil.

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