Reinforcing agent composition for hydraulic transmission oil as well as preparation method and application of reinforcing agent composition

Abstract

The preparation method of the reinforcing agent composition for the hydraulic transmission oil specifically comprises the following steps: step 1, stirring di-n-octylamine, isopropanol and sodium hydroxide, adding disulfur dichloride while stirring, standing to separate a water layer, washing an oil layer with diluted hydrochloric acid and water respectively until the oil layer is neutral, removing water, and adding sulfuryl chloride while stirring to obtain a mixture A; step 2, stirring the mixture A and 2, 3-dihydro-2, 2-dimethyl-7-benzofuranyl-methyl-N-carbamate for reaction, adding an ammonia water solution in the reaction, standing for layering to remove moisture, desolventizing an oil layer under reduced pressure, adding base oil, heating and stirring to obtain a mixture B; and step 3, stirring the mixture B and a boronizing dispersant to obtain the reinforcing agent composition. When the lubricating oil additive is added into hydraulic transmission oil, the hydraulic transmission oil has excellent friction durability.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oil reinforcing agent preparation, and specifically relates to a reinforcing agent composition for hydraulic transmission oil, and also relates to a preparation method of the reinforcing agent composition for hydraulic transmission oil and application of the reinforcing agent composition for hydraulic transmission oil. Background Art

[0002] Hydraulic transmission oil is also called automatic transmission fluid (ATF) or automatic transmission oil. As a working medium, hydraulic transmission oil is often used in vehicle automatic transmissions consisting of a torque converter, a hydraulic coupling and a mechanical transmission. It plays a role in transmitting energy in the vehicle transmission through the kinetic energy of the liquid.

[0003] According to preliminary statistics, my country's construction machinery hydraulic transmission oil is about 110,000 tons, of which service oil is about 90,000 tons and installed oil is about 20,000 tons. Domestic construction machinery OEMs mainly use domestic planetary gear transmissions, and copper-based friction plates are used for friction plates. Generally, No. 8 hydraulic transmission oil is selected. International OEMs generally use special oils (or obtain OEM certification, or meet OEM specifications) as hydraulic transmission oils.

[0004] The hydraulic transmission oils sold in China are generally divided into three technical levels. The No. 8 hydraulic transmission oil widely used in China is the lowest level; hydraulic transmission oil products that meet some expired international OEM specifications are the middle level, such as some hydraulic transmission oil products that meet the obsolete Allison-C4 (TES-228) standard; top-level hydraulic transmission oil products meet the international OEM specifications in use or have obtained OEM certification, such as hydraulic transmission oil products that need to meet Caterpillar-TO4 specifications or obtain AllisonTES-439 certification.

[0005] Friction performance is the core performance of hydraulic transmission oil, which mainly affects the shifting feeling of engineering machinery drivers. The international OEM specifications use SAE No2 friction tester to evaluate the friction performance of hydraulic transmission oil, mainly examining the dynamic friction coefficient, static friction coefficient, stopping time and friction cycle number of hydraulic transmission oil products. The friction cycle number reflects the friction durability performance. The more friction cycles, the better the friction durability, and the longer the oil change cycle of the hydraulic transmission oil. However, the friction durability of the current domestic No. 8 hydraulic transmission oil is poor. Summary of the invention

[0006] The first object of the present invention is to provide a method for preparing a reinforcing agent composition for hydraulic transmission oil.

[0007] The second object of the present invention is to provide a reinforcing agent composition for hydraulic transmission oil, which can improve the friction durability of domestic No. 8 hydraulic transmission oil.

[0008] The third object of the present invention is to provide an application of the reinforcing agent composition for hydraulic transmission oil.

[0009] The first technical solution adopted by the present invention is a method for preparing a reinforcing agent composition for hydraulic transmission oil, which specifically comprises the following steps:

[0010] Step 1, dioctylamine, isopropanol and sodium hydroxide are stirred and disulfur dichloride is added under stirring, the mixture is allowed to stand to separate the water layer, the oil layer is washed with dilute hydrochloric acid and water respectively until neutral, sulfuryl chloride is added under stirring after removing water, to obtain a mixture A;

[0011] Step 2, stirring the mixture A obtained in step 1 with 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate, adding a 10% ammonia aqueous solution to the reaction, standing to separate the layers to remove moisture, decompressing the oil layer to desolventize, adding base oil, heating and stirring to obtain a mixture B;

[0012] Step 3: Stirring the mixture B obtained in step 2 with a boronated dispersant to obtain a reinforcing agent composition.

[0013] The present invention is also characterized in that:

[0014] In step 1, the mass ratio of dioctylamine, isopropyl alcohol and sodium hydroxide is 20:20:1;

[0015] The mass ratio of dioctylamine to disulfur dichloride is 5:3;

[0016] The mass ratio of disulfur dichloride to sulfuryl chloride is 1:0.98-1.02.

[0017] In step 1, the stirring temperature is 0°C, the stirring time is 1 h after adding disulfur dichloride, and the stirring time is 1 h after adding sulfuryl chloride.

[0018] In step 2, the mass ratio of mixture A, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate and aqueous ammonia solution is 25:17.5 to 30:1;

[0019] The mass ratio of mixture A to base oil is 5:1.

[0020] In step 2, the stirring temperature is 10°C, and the reaction is carried out for 2 hours after adding the ammonia solution.

[0021] In step 3, the mass ratio of mixture B to the boronated dispersant is 10:1.

[0022] In step 3, the stirring temperature is 100°C.

[0023] In step 3, the boronated dispersant is monosuccinimide, bissuccinimide, or boronated monosuccinimide, or a mixture of two of them in any ratio.

[0024] The second technical solution adopted by the present invention is that the reinforcing agent composition for hydraulic transmission oil is prepared by the above method.

[0025] The third technical solution adopted by the present invention is the application of the above reinforcing agent composition for hydraulic transmission oil in hydraulic transmission oil.

[0026] The beneficial effects of the present invention are:

[0027] (1) The reinforcing agent composition for hydraulic transmission oil of the present invention comprises a specific content of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-yl carbamate, and when used in the preparation of hydraulic transmission oil, the hydraulic transmission oil can have excellent friction durability;

[0028] (2) The preparation method of the reinforcing agent composition for hydraulic transmission oil of the present invention is simple and the raw materials are easy to obtain. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific implementation modes.

[0030] The preparation method of the reinforcing agent composition for hydraulic transmission oil of the present invention specifically comprises the following steps:

[0031] Step 1, dioctylamine, isopropanol and sodium hydroxide are stirred, the temperature is controlled at 0°C, and disulfur dichloride is added under stirring, and after stirring for 1 hour, the water layer is separated and the oil layer is washed with dilute hydrochloric acid and water respectively until neutral, and sulfuryl chloride is added with stirring after removing water, and stirred for 1 hour to obtain a mixture A;

[0032] Wherein, the mass ratio of di-n-octylamine, isopropyl alcohol and sodium hydroxide is 20:20:1;

[0033] The mass ratio of dioctylamine to disulfur dichloride is 5:3;

[0034] The mass ratio of disulfur dichloride to sulfuryl chloride is 1:0.98-1.02;

[0035] Step 2, stirring the mixture A obtained in step 1 with 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate at a temperature of 10° C., and adding a 10% ammonia aqueous solution to the reaction, reacting for 2 hours, standing to separate the layers to remove moisture, decompressing the oil layer, adding the base oil, and heating and stirring at 80° C. for 1 hour to obtain a liquid mixture;

[0036] The mass ratio of mixture A, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate and aqueous ammonia solution is 25:17.5-30:1;

[0037] The mass ratio of mixture A to base oil is 5:1;

[0038] The base oil uses 5.5-6.5cSt Class I base oil;

[0039] Step 3, stirring the mixture B obtained in step 2 and the boronized dispersant at 100° C. for 2 hours to obtain a reinforcing agent composition;

[0040] Wherein, the mass ratio of mixture B to the boronated dispersant is 10:1;

[0041] The boronized dispersant is one of monosuccinimide, bissuccinimide, or boronized monosuccinimide or a mixture of two of them in any ratio.

[0042] The present invention also provides a reinforcing agent composition for hydraulic transmission oil, which is prepared by the above method.

[0043] The present invention also provides the use of a reinforcing agent composition for hydraulic transmission oil in hydraulic transmission oil, wherein the hydraulic transmission oil is domestic No. 8 hydraulic transmission oil, the mass percentage of the reinforcing agent composition for hydraulic transmission oil is 0.5% to 2.5%, the mass percentage of the hydraulic transmission oil is 97.5% to 99.5%, and the sum of the mass percentages of the two is 100%.

[0044] Example 1

[0045] Step 1, 1000 parts of di-n-octylamine, 1000 parts of isopropanol and 50 parts of sodium hydroxide are stirred at 0°C, and 600 parts of disulfur dichloride are added under stirring, and after stirring for 1 hour, the water layer is separated and the oil layer is washed with dilute hydrochloric acid and water respectively until neutral, and after removing water, 600 parts of sulfuryl chloride are added under stirring and stirred for 1 hour to obtain a mixture A;

[0046] Step 2, stirring 1000 parts of the mixture A obtained in step 1 and 700 parts of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate to react at a temperature of 10° C., and adding 40 parts of a 10% ammonia aqueous solution to the reaction, reacting for 2 hours, standing to separate and remove moisture, decompressing the oil layer and desolventizing it, adding 200 parts of base oil, and heating and stirring at 80° C. for 1 hour to obtain a mixture B;

[0047] The base oil uses 5.5-6.5cSt Class I base oil;

[0048] Step 3: Stir 1000 parts of the mixture B obtained in step 2 and 100 parts of boronated monosuccinimide at 100° C. for 2 hours to obtain a reinforcing agent composition.

[0049] The reinforcing agent composition for hydraulic transmission oil is used in hydraulic transmission oil, wherein the hydraulic transmission oil is domestic No. 8 hydraulic transmission oil, the mass percentage of the reinforcing agent composition for hydraulic transmission oil is 1.5%, and the mass percentage of the hydraulic transmission oil is 98.5%.

[0050] Example 2

[0051] The difference from Example 1 is that 1000 parts of the mixture A obtained in step 1 and 950 parts of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate are stirred for reaction.

[0052] Example 3

[0053] The difference from Example 1 is that 1000 parts of the mixture A obtained in step 1 and 1200 parts of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate are stirred for reaction.

[0054] Example 4

[0055] The difference from Example 2 is that in step 3, 1000 parts of the mixture B obtained in step 2 and 100 parts of monosuccinimide are stirred at 100° C. for 2 hours to obtain a reinforcing agent composition.

[0056] Example 5

[0057] The difference from Example 2 is that in step 3, 1000 parts of the mixture B obtained in step 2 and 100 parts of bis-succinimide are stirred at 100° C. for 2 hours to obtain a reinforcing agent composition.

[0058] Example 6

[0059] The difference from Example 2 is that after removing water, 588 parts of sulfuryl chloride are added with stirring and stirred for 1 hour to obtain a mixture A.

[0060] Example 7

[0061] The difference from Example 2 is that after removing water, 612 parts of sulfuryl chloride are added with stirring and stirred for 1 hour to obtain a mixture A.

[0062] Comparative Example 1

[0063] The difference from Example 2 is that 1000 parts of the mixture A obtained in step 1 and 600 parts of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate are stirred for reaction.

[0064] Comparative Example 2

[0065] The difference from Example 2 is that 1000 parts of the mixture A obtained in step 1 and 1300 parts of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate are stirred for reaction.

[0066] Comparative Example 3

[0067] The difference from Example 2 is that the reinforcing agent composition for hydraulic transmission oil is used in hydraulic transmission oil, the mass percentage of the reinforcing agent composition for hydraulic transmission oil is 0.5%, and the mass percentage of the hydraulic transmission oil is 99.5%.

[0068] Comparative Example 4

[0069] The difference from Example 2 is that the reinforcing agent composition for hydraulic transmission oil is used in hydraulic transmission oil, the mass percentage of the reinforcing agent composition for hydraulic transmission oil is 2.5%, and the mass percentage of the hydraulic transmission oil is 97.5%.

[0070] In each embodiment and comparative example, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate is a commercially available product, and its structural formula is:

[0071]

[0072] In each embodiment and comparative example, di-n-octylamine, isopropyl alcohol, sodium hydroxide, disulfur dichloride, sulfuryl chloride and lye are commercially available products, and No. 8 hydraulic transmission oil is a commercially available No. 8 hydraulic transmission oil product.

[0073] Performance Characterization

[0074] The above embodiments and comparative products were tested using the Allison C4 Paper Friction Test of the Southwest Institute of Technology, USA. To pass the Allison C4 Paper Friction Test, 10,000 friction cycles are required and the test conditions must be met. The specific test conditions are shown in Table 1:

[0075] Table 1

[0076] name Testing requirements Stop time No more than 0.600s Midpoint friction coefficient Not less than 0.096

[0077] When the stop time exceeds 1.000s, the test stops automatically. The comparison products are No. 8 hydraulic transmission oil on the market and KRA3 hydraulic transmission oil products that meet the requirements of Allison C4 standard, and the tests are carried out at the same time for comparison.

[0078] Due to the large number of friction cycles, we only collected data from the 2000th, 4000th, 6000th, 8000th and 10000th cycles for comparison. The specific test results are shown in Table 2:

[0079] Table 2

[0080]

[0081]

[0082] It can be seen from Table 1 that the hydraulic transmission oil obtained in the embodiment of the present invention has relatively excellent friction durability and can meet the requirements of the Allison C4 Paper Friction Test. Its friction durability reaches the same technical level as that of the KRA3 hydraulic transmission oil. The comparative example 2 cannot be tested by the Allison C4 Paper Friction Test because needle-shaped crystals are precipitated after being placed at room temperature for 24 hours after being dissolved with the No. 8 hydraulic transmission oil.

Claims

1. A method for preparing a reinforcing agent composition for hydraulic transmission oil, characterized in that: The specific steps include: Step 1, dioctylamine, isopropanol and sodium hydroxide are stirred and disulfur dichloride is added under stirring, the mixture is allowed to stand to separate the water layer, the oil layer is washed with dilute hydrochloric acid and water respectively until neutral, sulfuryl chloride is added under stirring after removing water, to obtain a mixture A; Step 2, stirring the mixture A obtained in step 1 with 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate, adding a 10% ammonia aqueous solution to the reaction, standing to separate the layers to remove moisture, decompressing the oil layer to desolventize, adding base oil, heating and stirring to obtain a mixture B; Step 3: Stirring the mixture B obtained in step 2 with a boronated dispersant to obtain a reinforcing agent composition.

2. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 1, the mass ratio of di-n-octylamine, isopropyl alcohol and sodium hydroxide is 20:20:1; The mass ratio of dioctylamine to disulfur dichloride is 5:3; The mass ratio of disulfur dichloride to sulfuryl chloride is 1:0.98-1.

02.

3. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 1, the stirring temperature is 0°C, the stirring time is 1 h after adding disulfur dichloride, and the stirring time is 1 h after adding sulfuryl chloride.

4. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 2, the mass ratio of mixture A, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl-methyl-N-ylcarbamate and aqueous ammonia solution is 25:17.5-30:1; the mass ratio of mixture A to base oil is 5:

1.

5. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 2, the stirring temperature is 10°C, and the reaction is carried out for 2 hours after adding the ammonia solution.

6. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 3, the mass ratio of mixture B to the boronated dispersant is 10:

1.

7. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 3, the stirring temperature is 100°C.

8. The method for preparing the reinforcing agent composition for hydraulic transmission oil according to claim 1, characterized in that: In step 3, the boronated dispersant is monosuccinimide, bissuccinimide, or boronated monosuccinimide, or a mixture of two of them in any ratio.

9. A reinforcing agent composition for hydraulic transmission oil, characterized in that: The method is prepared by any one of claims 1 to 8.

10. Use of the reinforcing agent composition for hydraulic transmission oil according to claim 9 in hydraulic transmission oil.

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