Hydrodynamic transmission oil composition with high shear stability and preparation method thereof

Abstract

The invention relates to the technical field of hydraulic transmission oil, in particular to a hydraulic transmission oil composition with high shear stability and a preparation method thereof. The hydraulic transmission oil composition comprises the following components in parts by weight: 85-99 parts of base oil, 0.1-5 parts of a composite additive, 1-10 parts of a viscosity index improver, 0.1-2 parts of a pour point depressant and 0.001-0.1 part of an anti-foaming agent, the base oil is at least one of I type base oil, II type base oil and III type base oil; and the viscosity mark of the base oil is No.4, No.6 or No.8. The hydraulic transmission oil composition is simple in preparation method, not only has high shear stability, but also has relatively good low-temperature performance, copper sheet corrosion resistance and anti-rust performance, can be used for a hydraulic coupler and a hydraulic torque converter of a vehicle, and can also be used for a hydraulic transmission system of engineering machinery.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic transmission oil, and in particular to a hydraulic transmission oil composition with high shear stability and a preparation method thereof. Background Art

[0002] Hydraulic transmission oil is mainly used as the working medium of hydraulic transmission devices such as hydraulic couplings and torque converters, and plays the roles of energy transmission, anti-wear, system lubrication, corrosion prevention, rust prevention, and cooling.

[0003] The operating conditions of hydraulic transmission oil are relatively complex and are accompanied by high shear conditions. Long-term exposure to high shear conditions will reduce the viscosity of the oil, which may lead to wear problems of lubricated parts. Therefore, it is of great significance to develop a hydraulic transmission oil composition with high shear stability and a preparation method thereof. Summary of the invention

[0004] The present invention provides a hydraulic transmission oil composition with high shear stability and a preparation method thereof, which are used to improve the shear stability of hydraulic transmission oil in the prior art to ensure that the components are not worn due to excessively rapid viscosity drop during use.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides a hydraulic transmission oil composition, which comprises the following components by weight: 85-99 parts of base oil and 1-10 parts of viscosity index improver.

[0007] Preferably, the base oil is 90-98 parts, preferably 93-96 parts.

[0008] And / or, the viscosity index improver is 2-5 parts, preferably 3-5 parts.

[0009] According to the hydraulic transmission oil composition, the base oil is one or a mixture of several of Class I, Class II and Class III.

[0010] Preferably, the viscosity grade of the base oil is No. 4, No. 6 or No. 8.

[0011] The base oil of the present invention is preferably a composite of HVI Ic 150 base oil and HVI III8 base oil. Further preferably, the base oil is composed of HVI Ic 150 base oil and HVI III8 base oil in a mass ratio of 65-75:20-30.

[0012] The hydraulic transmission oil composition prepared by the present invention has high shear stability through the combination of base oil and viscosity index improver.

[0013] According to the hydraulic transmission oil composition, the viscosity index improver can be a PMA type viscosity index improver, an OCP type viscosity index improver or an HSD type viscosity index improver known in the art, preferably the viscosity index improver VX8-219 produced by Evonik.

[0014] Preferably, the viscosity index improver is a PMA type viscosity index improver.

[0015] According to the hydraulic transmission oil composition, the viscosity index improver is one or both of VX8-310 viscosity index improver and VX8-219 viscosity index improver.

[0016] Preferably, the viscosity index improver is VX8-219 viscosity index improver.

[0017] According to the hydraulic transmission oil composition, it also includes one or more of a composite additive, a pour point depressant, and an anti-foaming agent.

[0018] Preferably, the amount of the composite additive is 0.1 to 5 parts.

[0019] Alternatively, the pour point depressant is used in an amount of 0.1 to 2 parts.

[0020] Or, the antifoaming agent is used in an amount of 0.001 to 0.1 parts.

[0021] The hydraulic transmission oil composition of the present invention comprises the following components in parts by weight: 85-99 parts of base oil, 0.1-5 parts of composite additives, 1-10 parts of viscosity index improver, 0.1-2 parts of pour point depressant and 0.001-0.1 parts of antifoaming agent.

[0022] The main components of the composite additive are antioxidant, anti-wear agent and rust inhibitor;

[0023] Preferably, it also includes corrosion inhibitors, demulsifiers, dispersants and anti-foaming agents.

[0024] The composite additive of the present invention is mainly composed of antioxidant, anti-wear agent and rust inhibitor, and is prepared by adding corrosion inhibitor, demulsifier, dispersant and anti-foaming agent. The RF5012T composite additive produced by Xinxiang Ruifeng Company is preferred.

[0025] The pour point depressant of the present invention can be a PMA type pour point depressant or a fumaric acid type pour point depressant known in the art. Preferably, the pour point depressant is a PMA type pour point depressant. Preferably, the pour point depressant VX1-248 produced by Evonik is used.

[0026] The antifoaming agent of the present invention can be a silicon antifoaming agent, a non-silicon antifoaming agent or a composite antifoaming agent known in the art, preferably the BAN155 composite antifoaming agent produced by Mengqingxin Company.

[0027] The production process of a hydraulic transmission oil composition with high shear stability prepared from the hydraulic transmission oil compound, base oil, viscosity index improver, pour point depressant and antifoaming agent selected by the present invention is simple. By optimizing the components and dosages, the obtained composition has a good synergistic effect and exhibits good low temperature performance, copper sheet corrosion resistance and rust prevention performance.

[0028] As the best embodiment of the present invention, the high shear stability hydraulic transmission oil composition comprises a hydraulic transmission oil composed of 67-74 parts of HVI Ic 150 base oil, 22-26 parts of HVI III8 base oil, 0.6-1 parts of RF5012T composite additive, 4-5 parts of VX8-219 viscosity index improver, 0.1-0.3 parts of VX1-248 pour point depressant and 0.008-0.015 parts of antifoaming agent.

[0029] Preferably, the hydraulic transmission oil comprises 70.49 parts of HVI Ic 150 base oil, 24 parts of HVI III8 base oil, 0.8 parts of RF5012T composite additive, 4.5 parts of VX8-219 viscosity index improver, 0.2 parts of VX1-248 pour point depressant and 0.01 parts of antifoaming agent.

[0030] The optimal formulation exhibits high shear stability, and also has good low temperature performance, copper corrosion resistance and rust resistance.

[0031] In addition, the present invention further provides a preparation process of the hydraulic transmission oil composition with high shear stability, which is specifically: adding base oil, composite additives, viscosity index improver, pour point depressant and antifoaming agent into a blending kettle according to a predetermined proportion, and stirring at 60°C to 65°C for 2 to 3 hours.

[0032] The invention provides a hydraulic transmission oil composition with high shear stability. Physical and chemical tests and simulation tests have shown that the invention can exhibit high shear stability and has good low temperature performance, copper sheet corrosion resistance and rust resistance. The composition can be used in vehicle hydraulic couplings and hydraulic torque converters, and can also be used in hydraulic transmission systems of engineering machinery.

[0033] The preparation method of the engine oil of the present invention is simple and has high preparation efficiency. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are 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.

[0035] The HVI II+4 base oil in the embodiment of the present invention is purchased from Sinopec;

[0036] HVI II+6 base oil was purchased from Sinopec;

[0037] HVI Ic 150 base oil was purchased from Sinopec;

[0038] HVI III8 base oil was purchased from Ssangyong Company of South Korea;

[0039] RF5012T composite additive was purchased from Xinxiang Ruifeng Company;

[0040] VII-7067 (OCP type) viscosity index improver was purchased from Lubrizol Corporation;

[0041] T614 (OCP type) viscosity index improver was purchased from Jilin Petrochemical Company;

[0042] VII-260B (HSD type) viscosity index improver was purchased from Infineum Company;

[0043] VX8-310 (PMA type) viscosity index improver was purchased from Evonik;

[0044] VX8-219 (PMA type) viscosity index improver was purchased from Evonik;

[0045] VX1-248 pour point depressant was purchased from Evonik;

[0046] BAN155 antifoaming agent was purchased from Mengqingxin Company.

[0047] Example 1

[0048] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight percentage, 26.99% of HVI II+4 base oil, 65% of HVI II+6 base oil, 0.8% of RF5012T composite additive, 7% of VII-7067 (OCP type) viscosity index improver, 0.2% of VX1-248 pour point depressant, and 0.01% of BAN155 antifoaming agent.

[0049] The preparation method of the hydraulic transmission oil composition comprises:

[0050] Add base oil, composite additives, viscosity index improver, pour point depressant and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.

[0051] Example 2

[0052] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight percentage, 27.99% of HVI II+4 base oil, 65% of HVI II+6 base oil, 0.8% of RF5012T composite additive, 6% of T614 (OCP type) viscosity index improver, 0.2% of VX1-248 pour point depressant, and 0.01% of BAN155 antifoaming agent.

[0053] The preparation method of the hydraulic transmission oil composition comprises:

[0054] Add base oil, composite additives, viscosity index improver and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.

[0055] Example 3

[0056] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight percentage, 28.99% of HVI II+4 base oil, 65% of HVI II+6 base oil, 0.8% of RF5012T composite additive, 5% of VII-260B (HSD type) viscosity index improver, 0.2% of VX1-248 pour point depressant, and 0.01% of BAN155 antifoaming agent.

[0057] The preparation method of the hydraulic transmission oil composition comprises:

[0058] Add base oil, composite additives, viscosity index improver and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.

[0059] Example 4

[0060] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight percentage, 70.49% of HVI Ic150 base oil, 25% of HVI III8 base oil, 0.8% of RF5012T composite additive, 3.5% of VX8-310 (PMA type) viscosity index improver, 0.2% of VX1-248 pour point depressant, and 0.01% of BAN155 antifoaming agent.

[0061] The preparation method of the hydraulic transmission oil composition comprises:

[0062] Add base oil, composite additives, viscosity index improver and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.

[0063] Example 5

[0064] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight percentage, 70.49% of HVI Ic150 base oil, 24% of HVI III8 base oil, 0.8% of RF5012T composite additive, 4.5% of VX8-219 (PMA type) viscosity index improver, 0.2% of VX1-248 pour point depressant, and 0.01% of BAN155 antifoaming agent.

[0065] The preparation method of the hydraulic transmission oil composition comprises:

[0066] Add base oil, composite additives, viscosity index improver and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.

[0067] Test example

[0068] The hydraulic transmission oil compositions of Examples 1-5 were analyzed for viscosity-temperature performance, shear stability, low-temperature performance, anti-rust performance and copper corrosion performance. The results are shown in Table 1.

[0069] Table 1 Performance analysis of hydraulic transmission oil composition

[0070] project Test Method Example 1 Example 2 Example 3 Example 4 Example 5 <![CDATA[Kinematic viscosity at 100 °C, mm 2 / s]]> GB / T 265 7.83 7.97 8.26 7.71 7.68 Viscosity Index GB / T 1995 143 144 148 154 154 100℃ kinematic viscosity reduction rate after shearing, % NB / SH / T 0845 22.8 24.1 28.0 10.7 5.9 Brookfield viscosity (-18℃), mPa·s GB / T 11145 1600 1660 1700 1460 1400 Pour point, ℃ GB / T 3535 -39 -36 -42 -45 -45 Liquid phase corrosion (24h, A method) GB / T 11143 Rust-free Rust-free Rust-free Rust-free Rust-free Copper corrosion (100℃, 3h), level GB / T 5096 1b 1b 1b 1b 1b

[0071] As can be seen from Table 1, the hydraulic transmission oil of Example 5 has the best shear stability, the highest viscosity index, the lowest -18°C Brookfield viscosity and pour point, and has good copper sheet corrosion resistance and rust resistance, and can be used for vehicle hydraulic couplings and hydraulic torque converters, and can also be used for hydraulic transmission systems of engineering machinery.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic transmission oil composition, characterized in that: The composition comprises the following components by weight: 85 to 99 parts of base oil and 1 to 10 parts of viscosity index improver; The base oil comprises a HVI Ic 150 base oil and a HVI III8 base oil in a mass ratio of 65-75:20-30.

2. The hydraulic transmission oil composition according to claim 1, characterized in that: The base oil is 90-98 parts, preferably 93-96 parts; And / or, the viscosity index improver is 2-5 parts, preferably 3-5 parts.

3. The hydraulic transmission oil composition according to claim 1 or 2, characterized in that: The viscosity index improver is a PMA type viscosity index improver, an OCP type viscosity index improver or an HSD type viscosity index improver; Preferably, the viscosity index improver is a PMA type viscosity index improver.

4. The hydraulic transmission oil composition according to any one of claims 1 to 3, characterized in that: The viscosity index improver is one or both of VX8-310 viscosity index improver and VX8-219 viscosity index improver; Preferably, the viscosity index improver is VX8-219 viscosity index improver.

5. The hydraulic transmission oil composition according to any one of claims 1 to 4, characterized in that: It also includes one or more of composite additives, pour point depressants, and anti-foaming agents; Preferably, the amount of the composite additive is 0.1 to 5 parts; Or, the pour point depressant is used in an amount of 0.1 to 2 parts; Or, the antifoaming agent is used in an amount of 0.001 to 0.1 parts.

6. The hydraulic transmission oil composition according to claim 5, characterized in that: The main components of the composite additive are antioxidant, anti-wear agent and rust inhibitor; Preferably, it also includes corrosion inhibitors, demulsifiers, dispersants and anti-foaming agents.

7. The hydraulic transmission oil composition according to claim 5 or 6, characterized in that: The pour point depressant is a PMA type pour point depressant or a fumaric acid type pour point depressant; Preferably, the pour point depressant is a PMA type pour point depressant.

8. The hydraulic transmission oil composition according to any one of claims 5 to 7, characterized in that: The antifoaming agent is a silicon-based antifoaming agent, a non-silicon-based antifoaming agent or a composite antifoaming agent.

9. The hydraulic transmission oil composition according to claims 1-7, characterized in that: A hydraulic transmission oil comprising 67-74 parts of HVI Ic 150 base oil, 22-26 parts of HVI III8 base oil, 0.6-1 parts of RF5012T composite additive, 4-5 parts of VX8-219 viscosity index improver, 0.1-0.3 parts of VX1-248 pour point depressant and 0.008-0.015 parts of anti-foaming agent; Preferably, the hydraulic transmission oil comprises 70.49 parts of HVI Ic 150 base oil, 24 parts of HVI III8 base oil, 0.8 parts of RF5012T composite additive, 4.5 parts of VX8-219 viscosity index improver, 0.2 parts of VX1-248 pour point depressant and 0.01 parts of antifoaming agent.

10. The process for preparing the hydraulic transmission oil composition according to any one of claims 1 to 8, characterized in that: Add base oil, composite additives, viscosity index improver, pour point depressant and antifoaming agent into the blending kettle in a predetermined proportion and stir at 60℃~65℃ for 2~3 hours.