Hydraulic transmission oil composition with low pour point and preparation method thereof

Abstract

The invention relates to the technical field of hydraulic transmission oil, in particular to a low-pour-point hydraulic transmission oil composition and a preparation method thereof. The hydraulic transmission oil composition comprises the following components in parts by weight: 80-99 parts of base oil, 0.1-8 parts of a composite additive 5012T and 0.1-10 parts of a viscosity index improver, 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.6, No.8 or No.10. The hydrodynamic transmission oil composition disclosed by the invention is simple in production process and high in preparation efficiency, can reach a lower pour point without adding a pour point depressant, can be suitable for hydrodynamic transmission equipment such as a hydraulic coupler and a hydraulic torque converter, and can be applied to a harsh low-temperature environment.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic transmission oil, and in particular to a hydraulic transmission oil composition with a low pour point 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 uses the kinetic energy of the liquid to transfer energy. Hydraulic transmission oil requires suitable viscosity and a high viscosity index to ensure that the hydraulic transmission oil can be used normally in a wide temperature range. For some extremely cold areas, the operating temperature is often below -40℃, which requires the hydraulic transmission oil to have a lower pour point to ensure good fluidity of the oil in low temperature environments.

[0003] Conventional methods for preparing low pour point hydraulic transmission oils require the use of pour point depressants, which increases production steps and brings inconvenience to production. Therefore, it is of great significance to develop a low pour point hydraulic transmission oil and a preparation method thereof that does not use a pour point depressant. Summary of the invention

[0004] In order to solve the above problems, the present invention is proposed.

[0005] First, the present invention provides a hydraulic transmission oil composition, comprising the following components in parts by weight:

[0006] 80-99 parts of base oil, 0.1-8 parts of composite additive 5012T, and 0.1-10 parts of viscosity index improver; the base oil is at least one of Class I, Class II, and Class III base oils; the viscosity grade of the base oil is No. 6, No. 8, or No. 10.

[0007] The present invention finds that by using Class I, Class II, Class III base oils with viscosity grades of 6, 8 or 10, compounding a viscosity index improver and a composite additive 5012T, a hydraulic transmission oil with a low pour point can be prepared without adding a pour point depressant.

[0008] The composite additive 5012T is produced by Xinxiang Ruifeng Company.

[0009] In some embodiments, the hydraulic transmission fluid composition does not contain a pour point depressant.

[0010] Preferably, the base oil comprises a first base oil and a second base oil in a weight ratio of 1 to 3:1;

[0011] The first base oil is at least one of HVI Ia 150, HVI Ic 150, and HVI II 6; the second base oil is at least one of III8 and HVI II 10.

[0012] The combined use of the above two base oils can further improve the comprehensive performance of hydraulic transmission oil.

[0013] Preferably, HVI Ic 150 base oil and III8 base oil are compounded.

[0014] Preferably, the viscosity index improver is at least one of a PMA viscosity index improver, an OCP viscosity index improver, and a HSD viscosity index improver.

[0015] Preferably, the PMA type viscosity index improver is VX8-310 (produced by Evonik);

[0016] And / or, the OCP viscosity index improver is 35EX (produced by Chevron Oronite);

[0017] And / or, the HSD type viscosity index improver is SV260 (produced by Infineum).

[0018] Preferably, the hydraulic transmission oil composition comprises the following components in parts by weight:

[0019] 50-75 parts of the first base oil;

[0020] 20 to 50 parts of the second base oil;

[0021] Composite additive 5012T 0.5-1 part;

[0022] 2.5 to 5 parts of viscosity index improver.

[0023] Preferably, the hydraulic transmission oil composition further comprises 0.001 to 0.1 parts of an anti-foaming agent.

[0024] In the specific implementation process, the antifoaming agent is a silicon-type antifoaming agent, a non-silicon-type antifoaming agent or a composite antifoaming agent.

[0025] Preferably, the antifoaming agent is BAN155 composite antifoaming agent (produced by Mengqingxin Company).

[0026] Preferably, the hydraulic transmission oil composition comprises the following components in parts by weight:

[0027] 50-75 parts of the first base oil;

[0028] 20-50 parts of the second base oil;

[0029] Composite additive 5012T 0.5-1 part;

[0030] 2.5 to 5 parts of viscosity index improver;

[0031] Antifoaming agent 0.005-0.02 parts;

[0032] The first base oil is at least one of HVI Ia 150, HVI Ic 150, and HVI II 6; the second base oil is at least one of III8 and HVI II 10;

[0033] The viscosity index improver is a PMA type viscosity index improver.

[0034] Preferably, the hydraulic transmission oil composition comprises the following components in parts by weight:

[0035]

[0036] More preferably, the hydraulic transmission oil composition comprises the following components in parts by weight:

[0037]

[0038] As the best embodiment of the present invention, the hydraulic transmission oil composition comprises the following components by weight: 70.69 parts of HVIIc 150 base oil, 25 parts of III8 base oil, 0.8 parts of composite additive 5012T, 3.5 parts of VX8-310 viscosity index improver, and 0.01 parts of BAN155 composite antifoaming agent.

[0039] The optimal formulation exhibits a lower pour point and has better anti-rust and copper corrosion properties.

[0040] Furthermore, the present invention provides a method for preparing the hydraulic transmission oil composition in any of the above embodiments, comprising: mixing the components and stirring at 60° C. to 65° C. for 2 to 3 hours.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The hydraulic transmission oil composition of the present invention has a simple production process and high preparation efficiency, and can achieve a lower pour point without adding a pour point depressant. By optimizing the components and the dosage, the obtained composition has a good synergistic effect. Physical and chemical and simulation tests have proved that the hydraulic transmission oil composition of the present invention exhibits good rust prevention and copper corrosion performance at the same time, and can be applied to hydraulic transmission equipment such as hydraulic couplings and hydraulic torque converters, and can be used in harsh low-temperature environments. DETAILED DESCRIPTION

[0043] 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.

[0044] If no specific techniques or conditions are specified in the examples, all are carried out according to conventional methods or the techniques or conditions described in the literature in the field, or according to the product instructions. If no manufacturer is specified for the reagents and instruments used, all are conventional products that can be purchased through regular channels.

[0045] The preparation methods of the hydraulic transmission oil compositions in the following examples are all as follows: adding the base oil, the composite additive, the viscosity index improver and the antifoaming agent into a blending kettle according to a predetermined ratio, and stirring at 65° C. for 3 hours.

[0046] The composite additive in the following examples is 5012T produced by Xinxiang Ruifeng Company.

[0047] The antifoaming agent in the following embodiments is BAN155 composite antifoaming agent produced by Mengqingxin Company.

[0048] The HSD viscosity index improver in the following examples is SV260 from Infineum.

[0049] The OCP viscosity index improver in the following examples is 35EX from Chevron Oronite.

[0050] The PMA viscosity index improver in the following examples is VX8-310 produced by Evonik.

[0051] Example 1

[0052] The present embodiment provides a low pour point hydraulic transmission oil composition, which comprises, by weight: 69.19 parts of HVI Ia 150 base oil, 25 parts of III8 base oil, 0.8 parts of composite additives, 5 parts of HSD viscosity index improver, and 0.01 parts of antifoaming agent.

[0053] Example 2

[0054] The present embodiment provides a low pour point hydraulic transmission oil composition, which comprises, by weight: 69.69 parts of HVI Ia 150 base oil, 25 parts of III8 base oil, 0.8 parts of composite additives, 4.5 parts of OCP viscosity index improver, and 0.01 parts of antifoaming agent.

[0055] Example 3

[0056] The present embodiment provides a low pour point hydraulic transmission oil composition, which comprises, by weight: 70.69 parts of HVI Ia 150 base oil, 25 parts of III8 base oil, 0.8 parts of composite additives, 3.5 parts of PMA type viscosity index improver, and 0.01 parts of antifoaming agent.

[0057] Example 4

[0058] This embodiment provides a low pour point hydraulic transmission oil composition, which includes, by weight: 70.69 parts of HVI Ic 150 base oil, 25 parts of III8 base oil, 0.8 parts of composite additives, 3.5 parts of PMA type viscosity index improver, and 0.01 parts of anti-foaming agent.

[0059] Example 5

[0060] The present embodiment provides a hydraulic transmission oil composition with a low pour point, which comprises, by weight: 50 parts of HVI Ia 150 base oil, 46.39 parts of HVI II 10 base oil, 0.8 parts of composite additives, 2.8 parts of PMA viscosity index improver, and 0.01 parts of antifoaming agent.

[0061] Example 6

[0062] This embodiment provides a low pour point hydraulic transmission oil composition, which includes, by weight: 60 parts of HVI II 6 base oil, 36.69 parts of HVI II 10 base oil, 0.8 parts of composite additives, 2.5 parts of PMA viscosity index improver, and 0.01 parts of antifoaming agent.

[0063] Test example

[0064] The hydraulic transmission oil compositions of Examples 1-6 were analyzed for viscosity-temperature performance, pour point, anti-rust performance and copper corrosion performance. The results are shown in Table 1.

[0065] Table 1 Performance analysis of hydraulic transmission oil composition

[0066]

[0067] It can be seen from Table 1 that the hydraulic transmission oils of all embodiments of the present invention can be applied to hydraulic transmission equipment such as hydraulic couplings and hydraulic torque converters, and can be used in harsh low-temperature environments. Among them, the hydraulic transmission oil of Example 4 has a lower pour point, a higher viscosity index, and better rust prevention and copper sheet corrosion inhibition performance, and has the best comprehensive performance.

[0068] 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: It includes the following components by weight: 80-99 parts of base oil, 0.1-8 parts of composite additive 5012T, and 0.1-10 parts of viscosity index improver; the base oil is at least one of Class I, Class II, and Class III base oils; the viscosity grade of the base oil is No. 6, No. 8, or No.

10.

2. The hydraulic transmission oil composition according to claim 1, characterized in that: The base oil includes a first base oil and a second base oil in a weight ratio of 1 to 3:1; The first base oil is at least one of HVI Ia 150, HVI Ic 150, and HVI II 6; the second base oil is at least one of III8 and HVI II 10.

3. The hydraulic transmission oil composition according to claim 1, characterized in that: The viscosity index improver is at least one of a PMA viscosity index improver, an OCP viscosity index improver, and a HSD viscosity index improver.

4. The hydraulic transmission oil composition according to claim 3, characterized in that: The PMA type viscosity index improver is VX8-310; And / or, the OCP viscosity index improver is 35EX; And / or, the HSD type viscosity index improver is SV260.

5. The hydraulic transmission oil composition according to any one of claims 2 to 4, characterized in that: The hydraulic transmission oil composition comprises the following components in parts by weight: 50-75 parts of the first base oil; 20 to 50 parts of the second base oil; Composite additive 5012T 0.5-1 part; 2.5 to 5 parts of viscosity index improver.

6. The hydraulic transmission oil composition according to claim 2, characterized in that: It also includes 0.001 to 0.1 parts of anti-foaming agent.

7. The hydraulic transmission oil composition according to claim 6, characterized in that: The antifoaming agent is a BAN155 composite antifoaming agent.

8. The hydraulic transmission oil composition according to claim 1, characterized in that: The hydraulic transmission oil composition comprises the following components in parts by weight: 50-75 parts of the first base oil; 20-50 parts of the second base oil; Composite additive 5012T 0.5-1 part; 2.5 to 5 parts of viscosity index improver; Antifoaming agent 0.005-0.02 parts; The first base oil is at least one of HVI Ia 150, HVI Ic 150, and HVI II 6; the second base oil is at least one of III8 and HVI II 10; The viscosity index improver is a PMA type viscosity index improver.

9. The hydraulic transmission oil composition according to claim 8, characterized in that: The hydraulic transmission oil composition comprises the following components in parts by weight:

10. The method for preparing the hydraulic transmission oil composition according to any one of claims 1 to 9, characterized in that: include: After mixing all the components, stir at 60°C to 65°C for 2 to 3 hours.

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