Reinforcing agent composition for improving friction performance of No.8 hydraulic transmission oil and application of reinforcing agent composition

Abstract

The invention belongs to the technical field of lubricating oil, and particularly relates to a reinforcing agent composition for improving the friction performance of No.8 hydraulic transmission oil and application. The reinforcing agent composition is prepared from the following raw materials: ethyl pyrimiphos, 2-amino-2-oxy-1-(3-phenoxy phenyl) ethyl] 2-(4-dodecylbenzene)-3-methyl butyrate, a dispersing agent and base oil A. The invention further discloses a preparation method of the reinforcing agent composition. According to the invention, a compound system of ethylpyrimidinphosphorus and 2-amino-2-oxy-1-(3-phenoxy phenyl) ethyl] 2-(4-dodecyl-phenyl)-3-methylbutyrate is adopted, so that the friction performance is excellent, the friction performance of the hydraulic transmission oil 8 # can be improved, the test requirements of an Allison C-4 paper-based friction bench are met, and the friction performance of the hydraulic transmission oil 8 # is improved. And the device can adapt to different hydraulic transmission oil formula systems.

Description

Technical Field

[0001] This invention belongs to the field of lubricating oil technology, specifically relating to a reinforcing agent composition for improving the friction performance of No. 8 hydraulic transmission oil and its application. Background Technology

[0002] Hydraulic transmission is a fluid transmission system that uses liquid as the working medium and leverages the kinetic energy of the liquid to transfer energy. Hydraulic couplings, torque converters, and automatic transmissions are typical hydraulic transmission devices. In construction machinery gearboxes, both torque converters and automatic transmissions are hydraulic transmission devices. The fluid used in construction machinery gearboxes is primarily No. 8 hydraulic transmission oil.

[0003] Currently, the performance requirements for the widely used No. 8 hydraulic transmission oil are relatively low. Hydraulic transmission oil products with slightly higher technical levels need to meet some international OEM specifications that have expired abroad but are still used in China. Top-of-the-line products are hydraulic transmission oil products that meet the international OEM specifications that are currently in use or have obtained OEM certification.

[0004] Friction performance is the core performance of No. 8 hydraulic transmission oil, which mainly affects the shifting experience of the driver of construction machinery. No. 8 hydraulic transmission oil needs to meet the specifications of "JB / T12194-2015-Hydraulic Transmission Oil", but there is no friction performance test item in it.

[0005] The now-obsolete Allison C-4 (TES-228) standard, as well as Caterpillar-TO4 and Allison TES-439 standards, all tested friction performance. Among these, the SAE No.2 friction tester was used to evaluate the friction performance of hydraulic transmission fluids, primarily examining data such as the dynamic friction coefficient, static friction coefficient, stopping time, and number of friction cycles. The data measured by the SAE No.2 friction tester largely aligns with the actual performance of construction machinery during operation. For example, a longer stopping time in the test fluid indicates a higher likelihood of shifting slippage in the construction machinery. A higher μo / μd value (μo being the maximum dynamic friction coefficient during friction plate engagement, and μd being the midpoint friction coefficient during friction plate engagement) indicates a greater likelihood of noticeable jerking during shifting. A lower number of friction test cycles indicates a shorter lifespan for effective shifting engagement during the use of construction machinery.

[0006] Chinese invention patent application CN116333799A discloses a reinforcing agent, hydraulic transmission oil, and vehicle transmission. The reinforcing agent of this invention comprises, by mass percentage: 10-15% dispersant; 70-80% ionic liquid; and the remainder base oil. This reinforcing agent is not only simple in composition and environmentally friendly, but also, when used in the preparation of hydraulic transmission oil, enables the hydraulic transmission oil to maintain relatively excellent frictional properties after multiple cycles. However, the frictional properties still need further improvement.

[0007] Improving the operational comfort of engineering machinery products places increasingly higher demands on the performance of hydraulic transmission fluids. Enhancing the friction performance of hydraulic transmission fluids will be the future development trend of hydraulic transmission fluid products.

[0008] Therefore, there is a need to develop a reinforcing agent composition that can significantly improve the friction performance of hydraulic transmission oil. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a reinforcing agent composition for improving the frictional performance of No. 8 hydraulic transmission oil. When this composition is blended with No. 8 hydraulic transmission oil, it can improve the frictional performance of No. 8 hydraulic transmission oil, meeting the requirements of Allison C-4 paper-based friction bench test.

[0010] This invention is achieved through the following technical solution:

[0011] A reinforcing agent composition for improving the frictional properties of No. 8 hydraulic transmission oil, wherein the raw materials of the reinforcing agent composition include: ethyl pyrimidine phosphorus, 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, dispersant and base oil A.

[0012] Preferably, the raw materials of the reinforcing agent composition, by weight percentage, include: 30%-35% ethylpyrimidine phosphorus, 30%-35% 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, 18%-22% dispersant and the balance base oil A.

[0013] The structure of the ethylpyrimidine phosphorus is as follows:

[0014]

[0015] The structure of the 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate is as follows:

[0016]

[0017] Ethylpyrimidine phosphorus contains thiophosphate esters and nitrogen-containing heterocyclic groups, which can improve friction performance and anti-wear properties, making it suitable for various hydraulic transmission oil formulations. 2-Amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate has multiple benzene rings, ester structures, and nitrogen elements, allowing it to adsorb well onto the metal surfaces of friction pairs, providing excellent frictional properties for the oil film. The dispersant has nitrogen-containing heterocyclic and long carbon chain structures, which can stably dissolve the above two chemical components in the hydraulic transmission oil. Pentaerythritol oleate base oils contain a large number of ester structures, giving them excellent dissolving properties.

[0018] Preferably, the dispersant is selected from one or both of monosuccinimide and bissuccinimide.

[0019] Preferably, the base oil is a pentaerythritol oleate base oil.

[0020] More preferably, the kinematic viscosity of the base oil at 100°C is 2.0-10.0 mm. 2 / s.

[0021] The present invention also relates to a method for preparing the above-mentioned reinforcing agent composition, comprising the following steps:

[0022] (1) Heat base oil A, add dispersant, stir, and obtain mixture 1;

[0023] (2) Ethylpyrimidine phosphorus and 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate were added to mixture 1 in sequence, and the mixture was heated and stirred to obtain the reinforcing agent composition.

[0024] Preferably, in step (1), the base oil A is heated to 60-80°C, and the stirring time is 0.8-1.2h.

[0025] Preferably, in step (2), after adding ethylpyrimidine phosphorus, the mixture is stirred for 0.8-1.2 h, and after adding 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, the mixture is stirred for 0.8-1.2 h; the temperature for heating and stirring is 75-85°C, and the time for heating and stirring is 3.5-4.5 h.

[0026] The present invention also relates to the application of the above-mentioned reinforcing agent composition in improving the frictional performance of hydraulic transmission oil.

[0027] Preferably, the reinforcing agent composition has a mass percentage content of 0.8%-1.2% based on the total mass of the hydraulic transmission oil, and more preferably 1%.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention employs a compound system of ethyl pyrimidine phosphorus and 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, which exhibits excellent friction performance. It can improve the friction performance of No. 8 hydraulic transmission oil, meet the requirements of Allison C-4 paper-based friction test bench, and can be adapted to different hydraulic transmission oil formulation systems. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are not intended to limit the present invention, but only to illustrate the present invention. Unless otherwise specified, the experimental methods used in the following embodiments are generally performed under conventional conditions. Unless otherwise specified, the materials and reagents used in the following embodiments are commercially available.

[0031] No. 8 hydraulic transmission oil is a commercially available product, including but not limited to Kunlun No. 8 hydraulic transmission oil, Great Wall No. 8 hydraulic transmission oil and Longpan No. 8 hydraulic transmission oil.

[0032] The pentaerythritol oleate base oil is a commercially available product with a kinematic viscosity of 10.0 mmHg at 100°C. 2 / s;

[0033] The reinforcing agent compositions in the following examples were all prepared according to the following method:

[0034] Base oil A was heated to 70°C, then a dispersant was added and stirred for 1 hour. Then, ethyl pyrimidine phosphorus and 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate were added sequentially, stirring for 1 hour each time. Then the temperature was raised to 80°C and stirred for 4 hours to obtain the reinforcing agent composition.

[0035] Example 1

[0036] The hydraulic transmission oil in this embodiment is obtained by mixing the reinforcing agent composition shown in Table 1 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition is 1.0%.

[0037] Table 1

[0038]

[0039] Example 2

[0040] The hydraulic transmission oil in this embodiment is obtained by mixing the reinforcing agent composition shown in Table 2 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition is 1.0%.

[0041] Table 2

[0042]

[0043] Example 3

[0044] The hydraulic transmission oil in this embodiment is obtained by mixing the reinforcing agent composition shown in Table 3 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition is 1.0%.

[0045] Table 3

[0046]

[0047] Example 4

[0048] The hydraulic transmission oil in this embodiment is obtained by mixing the reinforcing agent composition shown in Table 4 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition is 1.0%.

[0049] Table 4

[0050]

[0051] Comparative Example 1

[0052] The hydraulic transmission oil of this comparative example was obtained by mixing the reinforcing agent composition shown in Table 5 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition was 1.0%.

[0053] Table 5

[0054]

[0055] Comparative Example 2

[0056] The hydraulic transmission oil of this comparative example was obtained by mixing the reinforcing agent composition shown in Table 6 with hydraulic transmission oil No. 8; wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition was 1.0%.

[0057] Table 6

[0058]

[0059] Comparative Example 3

[0060] The hydraulic transmission oil of this comparative example was obtained by mixing the reinforcing agent composition shown in Table 7 with hydraulic transmission oil No. 8.

[0061] The reinforcing agent composition comprises 1.0% by mass, based on the total mass of the hydraulic transmission oil.

[0062] Table 7

[0063]

[0064] Comparative Example 4

[0065] The hydraulic transmission oil of this comparative example was obtained by mixing the reinforcing agent composition shown in Table 8 with hydraulic transmission oil No. 8.

[0066] The reinforcing agent composition comprises 1.0% by mass, based on the total mass of the hydraulic transmission oil.

[0067] Table 7

[0068]

[0069] Comparative Example 5

[0070] The only difference between the reinforcing agent composition in this comparative example and that in Example 1 is the replacement of ethylpyrimidine phosphorus with an ionic liquid, the structural formula of which is as follows:

[0071]

[0072] Comparative Example 6

[0073] The reinforcing agent composition in this comparative example differs from that in Example 1 only in that 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate is replaced with an ionic liquid, the structural formula of which is as follows:

[0074]

[0075] Effect test

[0076] The friction performance of the above examples and comparative examples was tested using the Allison C4 paper-based friction test bench from the Southwest Laboratories, USA. The Allison C4 paper-based friction test requires 10,000 friction cycles and must meet the test conditions. Commercially available No. 8 hydraulic transmission oil and products that meet the Allison C4 specifications were tested. The specific test conditions are shown in Table 6 below. The test results of Examples 1-4 and Comparative Examples 3-6 are shown in Table 7.

[0077] Table 6 Test Conditions

[0078] name Test requirements No. 8 hydraulic transmission oil Allison C4 specification products Stop time No more than 0.600s 0.723 / 0.801 0.451 / 0.497 midpoint friction coefficient Not less than 0.096 0.063 / 0.051 0.121 / 0.113

[0079] Table 7 Test Results

[0080]

[0081] As can be seen from Table 7, the hydraulic transmission oils obtained in Examples 1-4 of the present invention have superior friction performance and can meet the requirements of the Allison C4 paper-based friction test bench. Comparative Examples 1 and 2 showed turbidity after being stored at room temperature for 30 days, and could not be tested on the Allison C4 paper-based friction test bench.

[0082] The above detailed description is a specific description of one of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of the technical solution of the present invention.

Claims

1. A reinforcing agent composition for improving the frictional properties of No. 8 hydraulic transmission oil, characterized in that, The raw materials for the reinforcing agent composition include: ethyl pyrimidine phosphorus, 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, dispersant and base oil A.

2. The reinforcing agent composition according to claim 1, characterized in that, The raw materials of the reinforcing agent composition, by weight percentage, include: 30%-35% ethylpyrimidine phosphorus, 30%-35% 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, 18%-22% dispersant and the balance base oil A.

3. The reinforcing agent composition according to claim 1 or 2, characterized in that, The dispersant is selected from one or both of monosuccinimide dispersants and bissuccinimide dispersants.

4. The reinforcing agent composition according to claim 1 or 2, characterized in that, The base oil A is a pentaerythritol oleate base oil.

5. The reinforcing agent composition according to claim 4, characterized in that, The kinematic viscosity of base oil A at 100°C is 2.0-10.0 mm. 2 / s.

6. A method for preparing the reinforcing agent composition according to any one of claims 1-5, characterized in that, Includes the following steps: (1) Heat base oil A, add dispersant, stir, and obtain mixture 1; (2) Ethylpyrimidine phosphorus and 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate were added to mixture 1 in sequence, and the mixture was heated and stirred to obtain the reinforcing agent composition.

7. The preparation method according to claim 6, characterized in that, In step (1), the base oil A is heated to 60-80℃, and the stirring time is 0.8-1.2h.

8. The preparation method according to claim 6, characterized in that, In step (2), after adding ethylpyrimidine phosphorus, the mixture is stirred for 0.8-1.2 h, and after adding 2-amino-2-oxy-1-(3-phenoxyphenyl)ethyl]2-(4-dodecyl-phenyl)-3-methylbutyrate, the mixture is stirred for 0.8-1.2 h; the temperature for heating and stirring is 75-85℃, and the time for heating and stirring is 3.5-4.5 h.

9. The use of the reinforcing composition according to any one of claims 1-5 in improving the frictional properties of hydraulic transmission oil.

10. The application according to claim 9, characterized in that, Based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent composition is 0.8%-1.2%.

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