High-temperature detergency zinc-free hydrogenated hydraulic oil composition

Abstract

The invention provides a high-temperature detergency zinc-free hydrogenated hydraulic oil composition, and relates to the technical field of hydraulic oil additives. The hydraulic oil composition is prepared from the following components in percentage by weight: 0.2 percent to 0.4 percent of an anti-wear agent, 0.05 percent to 0.1 percent of an extreme pressure agent, 0.02 percent to 0.05 percent of a metal deactivator, 0.1 percent to 0.3 percent of an antioxidant, 0.05 percent to 0.1 percent of an anti-rust agent, 0.01 percent to 0.03 percent of a cosolvent, 0.01 percent to 0.04 percent of a clearing agent, 0.2 percent to 1.0 percent of a pour point depressant, 0.01 percent to 0.05 percent of a de-foaming agent, 0.01 percent to 0.05 percent of a de-emulsifier and 98 percent to 99 percent of II type or III type base oil. The hydraulic oil disclosed by the invention has excellent wear resistance, water separation property, filterability, anti-rust property, hydrolytic stability, oxidation resistance, thermal stability and high-temperature detergency.

Description

Technical Field

[0001] This invention relates to the field of hydraulic oil additives, and more specifically, to a high-temperature detergency zinc-free hydrogenated hydraulic oil composition. Background Technology

[0002] Zinc-free anti-wear hydraulic oil has excellent anti-wear properties, filtration properties, and corrosion resistance, especially with better hydrolytic stability under water-containing conditions. It is widely used in the steel and shipbuilding industries. However, traditional zinc-free anti-wear hydraulic oil is prone to oxidation and deterioration under high-temperature conditions, with an increased tendency to produce sludge and rapid changes in the color and appearance of the oil, making it unsuitable for widespread use in hydraulic systems of engineering machinery.

[0003] Chinese invention patent CN111100738B discloses an oxidation-resistant, long-life, zinc-free hydraulic fluid composition. It uses a combination of deeply refined base oil and alkyl naphthalene base oil as the base oil, and is formulated with zinc-free hydraulic oil multifunctional additives, phenolic antioxidants, amine antioxidants, metal deactivators, pour point depressants, and antifoaming agents. This oxidation-resistant, long-life, zinc-free hydraulic fluid composition can be widely used in various hydraulic systems operating under harsh conditions, high loads, and high oil temperatures, such as in construction machinery, marine equipment, and port machinery. It is also particularly suitable for the lubrication and sealing of hydraulic systems requiring long oil change intervals and those containing copper or silver components.

[0004] Chinese invention patent application CN107189847A discloses a zinc-free anti-wear hydraulic oil, which comprises the following components by weight percentage: base oil 98%-99%; extreme pressure anti-wear agent 0.2%-1.0%; antioxidant 0.05%-0.2%; metal deactivator 0.01%-0.5%; rust inhibitor 0.05%-0.1%; demulsifier 0.03%-0.06%; and antifoaming agent 0.001%-0.01%.

[0005] Chinese invention patent application CN102399612A discloses a zinc-free high-pressure anti-wear hydraulic oil, which comprises the following components by weight percentage: 98%-99% base oil, 0.1%-1.0% antioxidant, 0.2%-1.0% extreme pressure anti-wear agent, 0.01%-0.1% rust inhibitor, 0.01%-0.1% metal passivator, 0.01%-0.1% detergent-dispersant, and 0.0001%-0.001% antifoaming agent. The invention also discloses a method for preparing this zinc-free high-pressure anti-wear hydraulic oil.

[0006] None of the aforementioned patent applications involve the use of polyisobutylene succinic anhydride in zinc-free hydraulic oil compositions blended in Group II or Group III base oils. Summary of the Invention

[0007] This invention utilizes polyisobutylene succinic anhydride, which has excellent solubilizing effects and can greatly enhance the solubility of detergents and rust inhibitors in the composition. When combined with anti-wear agents, extreme pressure agents, antioxidants, and metal deactivators, it forms a composition that can be blended in Group II or Group III base oils to meet the requirements of low sludge and long service life under high-temperature conditions. This results in a zinc-free anti-wear hydraulic oil specifically for engineering machinery, meeting the needs of hydraulic systems in engineering machinery for zinc-free components, good high-temperature oxidation stability, and low sludge formation tendency, thus satisfying the technical requirements of GB 11118.1-2011.

[0008] The first aspect of the present invention is to provide a high-temperature detergency zinc-free hydrotreated hydraulic oil composition comprising the following components in weight percentage: 0.2%-0.4% anti-wear agent, 0.05%-0.1% extreme pressure agent, 0.02%-0.05% metal passivator, 0.1%-0.3% antioxidant, 0.05%-0.1% rust inhibitor, 0.01%-0.03% cosolvent, 0.01%-0.04% detergent, 0.2%-1.0% pour point depressant, 0.01%-0.05% defoamer, 0.01%-0.05% demulsifier, with the balance being Group II or Group III base oil;

[0009] The co-solvent is polyisobutylene succinic anhydride, which has the following general structural formula:

[0010]

[0011] Where n is an integer between 20 and 40.

[0012] Preferably, the polyisobutylene succinic anhydride is T2007A from Wuxi Nanfang.

[0013] Preferably, the anti-wear agent is triphenyl thiophosphate.

[0014] More preferably, the triphenyl thiophosphate is selected from at least one of BASF's TPPT and Pacific United Petrochemical's T309.

[0015] Preferably, the extreme pressure agent is a dialkyl dithiophosphate acrylate, having the following general structural formula:

[0016]

[0017] R1, R2, and R3 are independently selected from isobutyl, methyl, or isopropyl.

[0018] More preferably, the dialkyl dithiophosphate acrylate is selected from at least one of BASF's IR353 and Pacific United Petrochemical's PSAIL3530.

[0019] Preferably, the metal passivating agent is a benzotriazole derivative having the following general structural formula:

[0020]

[0021] In this context, R4 is methyl or ethyl, and R5 is diisopentylamino, diisobutylamino, or diisooctylamino.

[0022] More preferably, the benzotriazole derivative is a methylbenzotriazole derivative, selected from at least one of BASF's IR39 and Shanghai Hongze's MF439.

[0023] Preferably, the rust inhibitor is neutral synthetic calcium sulfonate.

[0024] More preferably, the neutral synthetic calcium sulfonate has a total base value of less than 10 mg KOH / g, a sulfur content of greater than 2.8%, and a calcium content of greater than 2%; and is selected from at least one of BDC010 from Jinzhou Kangtai and RP904 from Shanghai Hongze.

[0025] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol and an alkylated diphenylamine derivative. T501 and L57 are preferred.

[0026] Preferably, the detergent is a sulfurized alkylphenol salt.

[0027] More preferably, the total base value of the sulfidated alkylphenol salt is greater than 250 mg KOH / g, the calcium content is greater than 9%, and the sulfur content is greater than 3%; preferably, sulfidated alkylphenol calcium T115B.

[0028] Preferably, the pour point depressant is a polymethyl methacrylate type pour point depressant.

[0029] More preferably, the polymethyl methacrylate pour point depressant is selected from any one of Shenyang Great Wall's SCR248, Evonik's VPL 1-156, and Yingkou Ganghe's GP826.

[0030] Preferably, the defoamer is selected from any one of Mengqingxin 155, BASF AH3, and Jinzhou Shengda T921.

[0031] Preferably, the demulsifier is an oil-soluble polyether polymer, selected from any one of Guangzhou Shengruiyan DL32, Jinzhou Kangtai DL32, and Lubrizol LZ5967.

[0032] Preferably, the base oil is a Group II or Group III base oil with a grade of 150N or 500N, selected from base oil resources from Hebei Feitian, Formosa Plastics, or Daqing Petrochemical.

[0033] Compared with the prior art, the present invention has the following beneficial effects: The high-temperature detergency zinc-free hydrogenated hydraulic oil composition does not contain zinc and uses polyisobutylene succinic anhydride, which has excellent solubilizing effect and can greatly enhance the solubility of detergents and rust inhibitors in the composition. When combined with anti-wear agents, extreme pressure agents, antioxidants and metal passivators, it can form a composition that can be blended in Group II base oils to meet the requirements of low sludge and long service life for engineering machinery, and meets the technical requirements of GB11118.1-2011. Detailed Implementation

[0034] Example 1

[0035] The composition of the hydraulic oil composition is shown in Table 1.

[0036] Table 1: Composition of the hydraulic oil composition in Example 1

[0037]

[0038]

[0039] Example 2

[0040] The composition of the hydraulic oil composition is shown in Table 2.

[0041] Table 2: Composition of the hydraulic oil composition in Example 2

[0042]

[0043]

[0044] Example 3

[0045] The composition of the hydraulic oil composition is shown in Table 3.

[0046] Table 3: Composition of the hydraulic oil composition in Example 3

[0047]

[0048]

[0049] Example 4

[0050] The composition of the hydraulic oil composition is shown in Table 4.

[0051] Table 4: Composition of the hydraulic oil composition in Example 4

[0052]

[0053] Comparative Example 1:

[0054] The composition of the hydraulic oil composition is shown in Table 5.

[0055] Table 5: Composition of the hydraulic oil composition in Comparative Example 1

[0056] name mass fraction / % Thiophosphate T309 0.3 Alkyl thiophosphate IR353 0.05 IR39, a methylbenzotriazole derivative 0.03 2,6-Di-tert-Butylphenol T501 0.15 Nonyl diphenylamine L57 0.15 Synthetic calcium sulfonate BDC010 0.07 Alkylphenol calcium sulfide T115B 0.04 Compound defoamer T921 0.01 Polyether-type demulsifier DL32 0.01 GP826, a polymethyl methacrylate pour point depressant 0.2 Hebei Feitian HVIH5 60 Hebei Feitian HVIH10 38.99

[0057] Comparative Example 2

[0058] The composition of the hydraulic oil composition is shown in Table 6.

[0059] Table 6: Composition of the hydraulic oil composition in Comparative Example 2

[0060]

[0061]

[0062] The hydraulic oil compositions of Examples 1-4 and Comparative Examples 1-2 were subjected to performance tests. The test items, quality indicators and experimental methods are shown in Table 7, and the test results are shown in Table 8.

[0063] Table 7: Test Items, Quality Indicators, and Experimental Methods

[0064]

[0065]

[0066] Table 8: Performance test results of hydraulic oil compositions in Examples 1-4 and Comparative Examples 1-2

[0067]

[0068]

[0069] The performance data of the zinc-free anti-wear hydraulic oil formulated through the examples show that the high-temperature detergency zinc-free hydrogenated hydraulic oil composition of the present invention has excellent anti-wear properties, rust prevention, filterability, and high-temperature detergency.

[0070] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A high-temperature detergency zinc-free hydrotreated hydraulic oil composition, comprising the following components in weight percentage: anti-wear agent 0.2%-0.4%, extreme pressure agent 0.05%-0.1%, metal passivator 0.02%-0.05%, antioxidant 0.1%-0.3%, rust inhibitor 0.05%-0.1%, cosolvent 0.01%-0.03%, detergent 0.01%-0.04%, pour point depressant 0.2%-1.0%, defoamer 0.01%-0.05%, demulsifier 0.01%-0.05%, and the balance being Group II or Group III base oil; in, The cosolvent is polyisobutylene succinic anhydride, which has the following general structural formula: Where n is an integer between 20 and 40.

2. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The polyisobutylene succinic anhydride is T2007A.

3. The high-temperature detergency zinc-free hydrogenated hydraulic oil composition according to claim 1, characterized in that, The anti-wear agent is triphenyl thiophosphate.

4. The high-temperature detergency zinc-free hydrogenated hydraulic oil composition according to claim 1, characterized in that, The extreme pressure agent is dialkyl dithiophosphate acrylate, which has the following general structural formula: R1, R2, and R3 are independently selected from isobutyl, methyl, or isopropyl.

5. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The metal passivating agent is a benzotriazole derivative with the following general structural formula: In this context, R4 is methyl or ethyl, and R5 is diisopentylamino, diisobutylamino, or diisooctylamino.

6. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The rust inhibitor is neutral synthetic calcium sulfonate.

7. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The antioxidant is 2,6-di-tert-butyl-p-cresol and an alkylated diphenylamine derivative.

8. The high-temperature detergency zinc-free hydrogenated hydraulic oil composition according to claim 1, characterized in that, The detergent is a sulfurized alkylphenol salt.

9. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The pour point depressant is a polymethyl methacrylate type pour point depressant.

10. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The defoamer is a compound defoamer, selected from any one of Mengqingxin's 155, BASF's AH3, and Jinzhou Shengda's T921.

11. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The demulsifier is an oil-soluble polyether polymer, selected from any one of Guangzhou Shengruiyan DL32, Jinzhou Kangtai DL32, and Lubrizol LZ5967.

12. The high-temperature detergency zinc-free hydrotreated hydraulic oil composition according to claim 1, characterized in that, The base oil is a Group II or Group III 150N and 500N base oil, selected from base oil resources from Hebei Feitian, Formosa Plastics or Daqing Petrochemical.

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