Flame-retardant hydraulic oil composition and preparation method thereof

Abstract

The invention belongs to the field of hydraulic oil, and particularly discloses a flame-retardant hydraulic oil composition and a preparation method thereof. The hydraulic oil composition is prepared from the following components in parts by weight: 67 to 97 parts of main base oil, 5 to 30 parts of auxiliary base oil, 1.2 to 1.5 parts of a lubricating agent, 1.5 to 2.0 parts of an antioxidant, 0.03 to 0.06 part of a corrosion inhibitor, 0.01 to 0.08 part of a demulsifying agent and 0.01 to 0.08 part of a de-foaming agent, the auxiliary base oil is one of trimethylolpropane trinonanoate, trimethylolpropane caprylic capric acid ester and trimethylolpropane caprylic laurate; the components are sequentially mixed to obtain the flame-retardant hydraulic oil. According to the invention, a specific main-auxiliary base oil system is compounded with other additives, so that the final oil product has excellent anti-oxidation characteristic, the use temperature upper limit is improved, the service life of the oil product is further prolonged, and the stability and low-temperature pumping capacity of the oil product in the use process are improved.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic oil, and in particular relates to a flame retardant hydraulic oil composition and a preparation method thereof. Background Art

[0002] Hydraulic oil is the working medium of the hydraulic system. Its role in the hydraulic system is to transmit power, lubricate the friction parts of the hydraulic system, prevent rust, resist corrosion, cool and seal. As the requirements for equipment operating conditions become more and more stringent, the requirements for fire prevention and environmental protection are also constantly increasing. The flame-retardant hydraulic oils on the market are mainly water glycol type, synthetic ester type and phosphate ester type hydraulic oils. Among them, water glycol hydraulic oil contains a lot of water, so it has poor lubricity, the operating temperature should not be too high and the equipment is easy to rust. The price of phosphate ester type flame-retardant hydraulic oil is very high, and the waste oil is not easy to degrade after use, which is easy to cause environmental pollution. Synthetic ester type flame-retardant hydraulic oil has the advantages of being environmentally friendly and having a wide range of temperature and pressure. Therefore, it is increasingly accepted by more and more users in the market.

[0003] However, the synthetic ester flame-retardant hydraulic oil currently used is very easy to oxidize and deteriorate during use due to its formulation technology, which leads to problems such as short oil change period and high energy consumption of equipment operation. At present, there are also some research and development improvement plans, such as the introduction of vegetable oil, unsaturated polyol oleate, castor oil trimethylolpropane ester or sulfurized oleic acid polyol ester; but there are still many problems, such as: unsaturated polyol oleate is prone to oxidation and deterioration at high temperature, resulting in problems such as oil discoloration and increased kinematic viscosity; the use of vegetable oil will cause the pour point of the product to increase sharply, making it difficult to start the hydraulic system and causing irreparable wear of the equipment during the startup stage; castor oil trimethylolpropane ester and sulfurized oleic acid polyol ester are very easy to emulsify with water during use, causing equipment rust, unstable hydraulic system pressure and equipment wear.

[0004] Therefore, it is urgent to develop a product that can solve the problems of synthetic ester type flame retardant hydraulic oil being prone to oxidation and deterioration during use. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and provide a high-performance flame-retardant hydraulic oil formulation system, which has excellent antioxidant properties, high lubricity and extremely fast water separation. Based on this, the first aspect of the present invention provides a flame-retardant hydraulic oil composition, the components of which include, by weight: 67-97 parts of main base oil, 5-30 parts of auxiliary base oil, 1.2-1.5 parts of lubricant, 1.5-2.0 parts of antioxidant, 0.03-0.06 parts of corrosion inhibitor, 0.01-0.08 parts of demulsifier, and 0.01-0.08 parts of defoamer;

[0006] The main base oil is pentaerythritol tetraoleate; the auxiliary base oil is one of trimethylolpropane tripelanoate, trimethylolpropane octyl decanoate and trimethylolpropane octyl laurate.

[0007] The present invention finds that a main-auxiliary base oil system formed by using a specific pentaerythritol tetraoleate and a specific auxiliary base oil in a specific ratio and compounding other additives can make the final oil product have excellent antioxidant properties, and the upper limit of the use temperature can be increased from the conventional 90°C to 150°C, thereby increasing the service life of the oil product; and the sealing adaptability of the oil product is also improved and the pour point is reduced, which helps to improve the stability and low-temperature pumping ability of the oil product during use. If the main-auxiliary base oil system of the present invention (including the specific types of the main base oil and the auxiliary base oil and the amount of the two) is changed, it will have a greater impact on the realization effect of the final oil product.

[0008] In some preferred implementations, the defoamer is a polysiloxane emulsion. The present invention finds that in the above-mentioned primary-auxiliary base oil system, the use of a polysiloxane emulsion can better adapt to the system, thereby obtaining a better effect; when a non-silicon defoamer is used, the requirement for suppressing oil foam during use cannot be met, and when a dimethyl silicone oil product is used, its air release ability will be significantly reduced, which will cause the temperature of the oil to rise and the lubricity to decrease during use.

[0009] In some preferred implementations, the lubricant is at least one of QT301 anti-micropitting extreme pressure and anti-wear agent, sulfuric acid nitrogen derivatives, tricresyl phosphate, phosphate amine salt, thiophosphate amine salt and triphenyl thiophosphate. In a more preferred implementation, the lubricant is QT301 anti-micropitting extreme pressure and anti-wear agent and phosphate ammonium salt; the present invention finds that when the more preferred lubricant is used in the above-mentioned primary-auxiliary base oil system, the lubrication performance can be further improved, and the antioxidant capacity can be improved to a certain extent at the same time.

[0010] In some preferred implementations, the antioxidant is at least one of di-tert-butyl-p-cresol, di-tert-butyl mixed esters, N-phenyl-α-naphthylamine, octyl diphenylamine, 4,4'-methylene bis (2,6-di-tert-butylphenol) and thioether-based phenol antioxidants. In a more preferred implementation, the antioxidant is N-phenyl-α-naphthylamine, octyl diphenylamine, 4,4'-methylene bis (2,6-di-tert-butylphenol) and thioether-based phenol antioxidants.

[0011] In some preferred implementations, the corrosion inhibitor is at least one of thiadiazole derivatives, benzotriazole derivatives, benzotriazole, tolyltriazole, and sodium tolyltriazole. In a more preferred implementation, the corrosion inhibitor is a benzotriazole derivative.

[0012] In some preferred implementations, the above-mentioned demulsifier is a polyether polymer compound.

[0013] The second aspect of the present invention provides a method for preparing the flame retardant hydraulic oil composition, comprising the following steps: uniformly stirring the main base oil and the auxiliary base oil, then adding the lubricant and the antioxidant, and stirring until the solution is clear and transparent; subsequently adding the corrosion inhibitor, the defoamer and the demulsifier, and stirring until transparent to obtain the flame retardant hydraulic oil composition; wherein the temperature of the preparation method is controlled at 50°C-55°C throughout the entire process.

[0014] The beneficial effects of the present invention are as follows: the specific main-auxiliary base oil system used in the present invention is compounded with other additives, which can make the final oil product have excellent antioxidant properties, increase the upper limit of the use temperature, thereby increasing the service life of the oil product, and help to improve the stability of the oil product during use and the low-temperature pumping ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown are initial photos of the flame-retardant hydraulic oil composition obtained in Example 1-2 and the hydraulic oil composition obtained in Comparative Examples 1-4 before being subjected to an oven oxidation test;

[0016] Figure 2 Shown are photos of the results of oven oxidation tests on the flame-retardant hydraulic oil compositions obtained in Examples 1-2 and the hydraulic oil compositions obtained in Comparative Examples 1-4. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments and drawings to clearly and completely describe the concept and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0018] The raw materials and sources involved in the following content include:

[0019] Trimethylolpropane oleate: CRODA

[0020] Pentaerythritol tetraoleate: CRODA

[0021] P3970 Trimethylolpropane octyl decanoate: CRODA

[0022] P2720 Trimethylolpropane Tripelargonate: CRODA

[0023] QT301 Anti-micropitting extreme pressure anti-wear agent: Super Lubrication Technology (Foshan) Co., Ltd.

[0024] IRGALUBE349 phosphate amine salt: BASF

[0025] T557 Octyl diphenylamine: Jinzhou Xinxing Petroleum Additives Co., Ltd.

[0026] T511 4,4'-Methylenebis(2,6-di-tert-butylphenol): Guangzhou Ruicheng New Materials Co., Ltd.

[0027] T531N-phenyl-α-naphthylamine: Jinzhou Xinxing Petroleum Additives Co., Ltd.

[0028] L115 thioether phenol antioxidant: BASF

[0029] I39 Benzotriazole derivatives: BASF

[0030] T1001 demulsifier: Guangzhou Ruishengyan Chemical Technology Co., Ltd.

[0031] 155 polysiloxane emulsion: Mengqingxin Additive Trading (Shanghai) Co., Ltd.

[0032] Neopentyl glycol dioleate: Guangzhou Ruicheng New Materials Co., Ltd.

[0033] Example 1

[0034] A flame retardant hydraulic oil composition, the components of which are measured by weight: 67 parts of pentaerythritol tetraoleate, 30 parts of trimethylolpropane tripelanoate, 1.0 parts of QT301 anti-micropitting extreme pressure and antiwear agent, 0.4 parts of IRGALUBE349 phosphate amine salt, 0.6 parts of T557 octyl diphenylamine, 0.33 parts of T511 4,4'-methylenebis(2,6-di-tert-butylphenol), 0.30 parts of T531 N-phenyl-α-naphthylamine, 0.50 parts of L115 thioether-based phenol antioxidant, 0.05 parts of I39 benzotriazole derivatives, 0.01 parts of T1001 demulsifier, and 0.01 parts of 155 polysiloxane emulsion.

[0035] The preparation method of the flame-retardant hydraulic oil composition comprises the following steps: uniformly stirring pentaerythritol tetraoleate and trimethylolpropane tripelanoate, then adding QT301 anti-micropitting extreme pressure and anti-wear agent, IRGALUBE349 phosphate amine salt, T557 octyl diphenylamine, T511 4,4'-methylenebis(2,6-di-tert-butylphenol), T531 N-phenyl-α-naphthylamine, and L115 thioether-based phenol antioxidant, and stirring until the solution is clear and transparent; then adding I39 benzotriazole derivative, T1001 demulsifier, and 155 polysiloxane emulsion, and stirring until transparent to obtain the flame-retardant hydraulic oil composition; wherein the temperature of the preparation method is controlled at 50°C throughout the whole process.

[0036] Example 2

[0037] A flame retardant hydraulic oil composition, the components of which differ from those of Example 1 in that "30 parts of trimethylolpropane trispelargonate" in Example 1 are replaced by "30 parts of trimethylolpropane octyl decanoate"; the rest are the same as Example 1. The preparation method thereof differs from that of Example 1 in that "30 parts of trimethylolpropane trispelargonate" in Example 1 are replaced by "30 parts of trimethylolpropane octyl decanoate"; the rest are the same as Example 1.

[0038] Comparative Example 1

[0039] A hydraulic oil composition, the components of which differ from those of Example 1 in that "67 parts of pentaerythritol tetraoleate and 30 parts of trimethylolpropane trisnonanoate" in Example 1 are replaced with "97 parts of trimethylolpropane oleate"; the rest are the same as Example 1. The preparation method thereof comprises the following steps:

[0040] QT301 anti-micropitting extreme pressure and anti-wear agent, IRGALUBE349 phosphate amine salt, T557 octyl diphenylamine, T511 4,4'-methylenebis(2,6-di-tert-butylphenol), T531 N-phenyl-α-naphthylamine, and L115 thioether-based phenol antioxidant were added to trimethylolpropane oleate, and the solution was stirred until the solution was clear and transparent; then I39 benzotriazole derivative, T1001 demulsifier, and 155 polysiloxane emulsion were added, and the solution was stirred until transparent to obtain the hydraulic oil composition; wherein, the temperature was controlled at 50°C throughout the preparation process.

[0041] Comparative Example 2

[0042] A hydraulic oil composition, the components of which differ from those of Example 1 in that: "67 parts of pentaerythritol tetraoleate and 30 parts of trimethylolpropane trisnonanoate" in Example 1 are replaced with "67 parts of trimethylolpropane oleate and 30 parts of trimethylolpropane octanedecanoate"; the rest are the same as Example 1. The preparation method thereof comprises the following steps:

[0043] Trimethylolpropane oleate and trimethylolpropane octanedioate are stirred evenly, and then QT301 anti-micropitting extreme pressure and anti-wear agent, IRGALUBE349 phosphate amine salt, T557 octyl diphenylamine, T511 4,4'-methylenebis(2,6-di-tert-butylphenol), T531 N-phenyl-α-naphthylamine, L115 thioether-based phenol antioxidant are added, and stirred until the solution is clear and transparent; then I39 benzotriazole derivative, T1001 demulsifier, 155 polysiloxane emulsion are added, and stirred until transparent to obtain the hydraulic oil composition; wherein, the temperature of the preparation method is controlled at 50°C throughout the whole process.

[0044] Comparative Example 3

[0045] A hydraulic oil composition, the components of which are different from those of Example 1 in that "30 parts of trimethylolpropane trispelargonate" in Example 1 are replaced by "30 parts of neopentyl glycol dioleate"; the rest are the same as Example 1. The preparation method thereof is different from that of Example 1 in that "30 parts of trimethylolpropane trispelargonate" in Example 1 are replaced by "30 parts of neopentyl glycol dioleate"; the rest are the same as Example 1.

[0046] Comparative Example 4

[0047] A hydraulic oil composition, which differs from Example 1 in that: "67 parts of pentaerythritol tetraoleate and 30 parts of trimethylolpropane trispelargonate" in Example 1 are adjusted to "30 parts of pentaerythritol tetraoleate and 67 parts of trimethylolpropane trispelargonate", and the rest is the same as Example 1. The preparation method thereof differs from Example 1 in that: "67 parts of pentaerythritol tetraoleate and 30 parts of trimethylolpropane trispelargonate" in Example 1 are adjusted to "30 parts of pentaerythritol tetraoleate and 67 parts of trimethylolpropane trispelargonate", and the rest is the same as Example 1.

[0048] The components of the hydraulic oil compositions of Examples 1-2 and Comparative Examples 1-4 are shown in Table 1.

[0049] Table 1

[0050]

[0051] The flame retardant hydraulic oil compositions prepared in Examples 1-2 and the hydraulic oil compositions prepared in Comparative Examples 1-4 were used as test oils to perform lubricating oil viscosity-temperature, lubricity and anti-aging performance tests. The test methods and test results are shown in Tables 2 and Figure 1-2 As shown. Among them, the outdoor weathering test method: seal the oil in a colorless transparent glass bottle, place it outdoors without any shielding, and observe whether the oil has insoluble matter precipitated after 90 days. The oven oxidation test method: add 50g of oil to a beaker (250mL), and then keep it warm at 150℃ for 48h.

[0052] Table 2

[0053]

[0054]

[0055] According to the data in Table 2 and the oven oxidation comparison photos ( Figure 1 Shown are initial photos of the flame-retardant hydraulic oil composition obtained in Example 1-2 and the hydraulic oil composition obtained in Comparative Examples 1-4 before being subjected to an oven oxidation test; Figure 2The results of the oven oxidation test of the flame-retardant hydraulic oil compositions obtained in Examples 1-2 and the hydraulic oil compositions obtained in Comparative Examples 1-4 are shown in the figure. ) It can be seen that Example 1, Example 2, Comparative Example 1 and Comparative Example 3 meet the requirements of the NB / SH / T 6045-2021 standard, and the product viscosities of Comparative Example 2 and Comparative Example 4 do not meet the requirements of the NB / SH / T 6045-2021 standard. The use temperature of the products of Example 1 and Example 2 can reach 150°C. When the use temperature of Comparative Example 1 and Comparative Example 3 is 150°C, Comparative Example 1 will produce insoluble matter in the oil, affecting the filtering performance of the product, and the appearance is turbid, which does not meet the requirements for continued use. Comparative Example 3 will significantly deepen the color of the oil and shorten the service life of the oil.

[0056] The above is only a preferred embodiment of the present invention. The present invention is not limited to the above implementation. As long as the technical effect of the present invention is achieved by the same means, it should belong to the protection scope of the present invention. Within the protection scope of the present invention, its technical scheme and / or implementation method can have various modifications and changes.

Claims

1. A flame retardant hydraulic oil composition, characterized in that: The components thereof include, by weight: 67-97 parts of main base oil, 5-30 parts of auxiliary base oil, 1.2-1.5 parts of lubricant, 1.5-2.0 parts of antioxidant, 0.03-0.06 parts of corrosion inhibitor, 0.01-0.08 parts of demulsifier, and 0.01-0.08 parts of defoamer; The main base oil is pentaerythritol tetraoleate; the auxiliary base oil is one of trimethylolpropane tripelanoate, trimethylolpropane octyl decanoate and trimethylolpropane octyl laurate.

2. The flame retardant hydraulic oil composition according to claim 1, characterized in that: The defoaming agent is polysiloxane emulsion.

3. The flame retardant hydraulic oil composition according to claim 1, characterized in that: The lubricant is at least one of QT301 anti-micropitting extreme pressure anti-wear agent, sulfuric acid nitrogen derivatives, tricresol phosphate, phosphate amine salt, thiophosphate amine salt and triphenyl thiophosphate.

4. The flame retardant hydraulic oil composition according to claim 3, characterized in that: The lubricant is QT301 anti-micropitting extreme pressure anti-wear agent and phosphate ammonium salt.

5. The flame retardant hydraulic oil composition according to claim 1, characterized in that: The antioxidant is at least one of di-tert-butyl-p-cresol, di-tert-butyl mixed esters, N-phenyl-α-naphthylamine, octyl diphenylamine, 4,4'-methylenebis(2,6-di-tert-butylphenol) and thioether-based phenol antioxidants.

6. The flame retardant hydraulic oil composition according to claim 5, characterized in that: The antioxidants are N-phenyl-α-naphthylamine, octyl diphenylamine, 4,4'-methylenebis(2,6-di-tert-butylphenol) and thioether-based phenol antioxidants.

7. The flame retardant hydraulic oil composition according to claim 1, characterized in that: The corrosion inhibitor is at least one of thiadiazole derivatives, benzotriazole derivatives, benzotriazole, methyl benzotriazole, and sodium methyl benzotriazole.

8. The flame retardant hydraulic oil composition according to claim 7, characterized in that: The corrosion inhibitor is a benzotriazole derivative.

9. The flame retardant hydraulic oil composition according to claim 1, characterized in that: The demulsifier is a polyether polymer compound.

10. A method for preparing the flame retardant hydraulic oil composition according to any one of claims 1 to 9, characterized in that: The following steps are involved: The main base oil and the auxiliary base oil are stirred evenly, and then the lubricant and the antioxidant are added and stirred until the solution is clear and transparent; subsequently, the corrosion inhibitor, the defoamer and the demulsifier are added and stirred until transparent to obtain the flame retardant hydraulic oil composition; wherein, the temperature of the preparation method is controlled at 50°C-55°C throughout the whole process.

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