A high shear stability hydraulic transmission oil composition and a method for preparing the same

Abstract

The present application relates to the technical field of hydraulic transmission oil, and particularly relates 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: base oil 85-99 parts, composite additive 0.1-5 parts, viscosity index improver 1-10 parts, pour point depressant 0.1-2 parts, and anti-foaming agent 0.001-0.1 part. The base oil is at least one of type I, type II and type III base oil. The viscosity grade of the base oil is No. 4, No. 6 or No. 8. The hydraulic transmission oil composition has high shear stability, good low-temperature performance, good copper strip corrosion resistance and good rust prevention, and can be used in vehicle hydraulic couplings and hydraulic torque converters, and can also be used in the hydraulic transmission system of engineering machinery.

Description

TECHNICAL FIELD

[0001] The present application 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. BACKGROUND

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

[0003] The working condition of the hydraulic transmission oil is relatively complex, and may be accompanied by high shear working condition. Long-term working in the high shear working condition may reduce the viscosity of the oil, and further may cause wear problems of the 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

[0004] The present application provides a hydraulic transmission oil composition with high shear stability and a preparation method thereof, to improve the shear stability of the hydraulic transmission oil in the prior art, so as to ensure that the viscosity does not decrease too quickly during use, thereby preventing the wear of the parts.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The present application 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 the following: Group I, Group II, and Group 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 application is preferably compounded from 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] By matching the base oil with the viscosity index improver, the hydraulic transmission oil composition prepared by the present application has high shear stability.

[0013] According to the hydraulic transmission oil composition, the viscosity index improver can be selected from PMA type viscosity index improver, OCP type viscosity index improver or HSD type viscosity index improver known in the art. Preferably, the viscosity index improver is VX8-219 produced by the company.

[0014] Preferably, the viscosity index improver is 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, one or more of a complex additive, a pour point depressant and an antifoaming agent is further included.

[0018] Preferably, the complex additive is used in an amount of 0.1-5 parts.

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

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

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

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

[0023] Preferably, corrosion inhibitor, demulsifier, dispersant and antifoaming agent are further included.

[0024] The complex additive mainly includes antioxidant, anti-wear agent and rust inhibitor, and corrosion inhibitor, demulsifier, dispersant and antifoaming agent are further added. Preferably, the complex additive is RF5012T produced by Xinxiong Ruifeng Company.

[0025] The pour point depressant can be selected from PMA type pour point depressant or fumaric acid type pour point depressant known in the art. Preferably, the pour point depressant is PMA type pour point depressant. Preferably, the pour point depressant is VX1-248 produced by the company.

[0026] The antifoaming agent can be selected from silicon type antifoaming agent, non-silicon type antifoaming agent or complex type antifoaming agent known in the art. Preferably, the antifoaming agent is BAN155 complex type antifoaming agent produced by the company.

[0027] The high shear stability hydraulic transmission oil composition of the present application is prepared by the hydraulic transmission oil complex agent, base oil, viscosity index improver, pour point depressant and antifoam agent, and has the advantages of simple production process, good synergistic effect, good low temperature performance, copper corrosion resistance and rust resistance.

[0028] As the best embodiment of the present application, the high shear stability hydraulic transmission oil composition comprises the 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 part of RF5012T complex 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 antifoam 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 complex additive, 4.5 parts of VX8-219 viscosity index improver, 0.2 parts of VX1-248 pour point depressant and 0.01 parts of antifoam agent.

[0030] The best formula has high shear stability, and has good low temperature performance, copper corrosion resistance and rust resistance.

[0031] In addition, the present application further provides a preparation process of the high shear stability hydraulic transmission oil composition, specifically: the base oil, complex additive, viscosity index improver, pour point depressant and antifoam agent are added into a blending kettle in a predetermined proportion, and stirred at 60-65 DEG C for 2-3 hours.

[0032] The high shear stability hydraulic transmission oil composition provided by the present application has high shear stability, and has good low temperature performance, copper corrosion resistance and rust resistance. It can be used for vehicle hydraulic coupler and hydraulic torque converter, and can also be used for hydraulic transmission system of engineering machinery.

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

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

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

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

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

[0038] The HVI III8 base oil is purchased from the South Korean Shuanglong Company;

[0039] The RF5012T composite additive is purchased from the Xinxiang Ruifeng Company;

[0040] The VII-7067 (OCP type) viscosity index improver is purchased from the Lubrizol Company;

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

[0042] The VII-260B (HSD type) viscosity index improver is purchased from the Runying Union Company;

[0043] The VX8-310 (PMA type) viscosity index improver is purchased from the Yinchuang Company;

[0044] The VX8-219 (PMA type) viscosity index improver is purchased from the Yinchuang Company;

[0045] The VX1-248 pour point depressant is purchased from the Yinchuang Company;

[0046] The BAN155 antifoam agent is purchased from the Mengqingxin Company.

[0047] Embodiment 1

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

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

[0050] The base oil, the complex additive, the viscosity index improver, the pour point depressant and the antifoam agent are added to the blending kettle in a predetermined ratio and stirred at 60-65°C for 2-3 hours.

[0051] Example 2

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

[0053] The method for preparing the hydraulic transmission oil composition includes:

[0054] The base oil, the complex additive, the viscosity index improver and the antifoam agent are added to the blending kettle in a predetermined ratio and stirred at 60-65°C for 2-3 hours.

[0055] Example 3

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

[0057] The method for preparing the hydraulic transmission oil composition includes:

[0058] The base oil, the complex additive, the viscosity index improver and the antifoam agent are added to the blending kettle in a predetermined ratio and stirred at 60-65°C for 2-3 hours.

[0059] Example 4

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

[0061] The method for preparing the hydraulic transmission oil composition includes:

[0062] The base oil, the complex additive, the viscosity index improver and the antifoam agent are added to the blending kettle in a predetermined ratio and stirred at 60-65°C for 2-3 hours.

[0063] Example 5

[0064] This example provides a low pour point hydraulic transmission oil composition, which comprises, by weight percentage, HVI Ic150 base oil 70.49%, HVI III8 base oil 24%, RF5012T complex additive 0.8%, VX8-219 (PMA type) viscosity index improver 4.5%, VX1-248 pour point depressant 0.2%, BAN155 antifoam agent 0.01%.

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

[0066] The base oil, complex additive, viscosity index improver and antifoam agent are added into a blending kettle in a predetermined proportion, and stirred at 60-65°C for 2-3 hours.

[0067] Test example

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

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

[0070] Item Test Method Example 1 Example 2 Example 3 Example 4 Example 5 100 cSt 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 after shear, % 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 rust (24h, A method) GB / T 11143 No rust No rust No rust No rust No rust Copper strip corrosion (100℃, 3h), grade 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 Brookfield viscosity at -18°C and pour point, and has good copper sheet corrosion resistance and anti-rust performance, and can be used for vehicle hydraulic couplings and hydraulic torque converters, and also can be used for hydraulic transmission systems of engineering machinery.

[0072] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid power transmission oil composition characterized in that, By weight parts, consisting of: HVI Ic 150 base oil 70.49 parts, HVI III8 base oil 24 parts, RF5012T complex additive 0.8 parts, VX8-219 viscosity index improver 4.5 parts, VX1-248 pour point depressant 0.2 parts and antifoam 0.01 parts.

2. The process for preparing the fluid transmission oil composition of claim 1, characterized by: The base oil, complex additive, viscosity index improver, pour point depressant and antifoam are added to the blending kettle in the specified proportions and stirred at 60-65°C for 2-3 hours.