A fully synthetic high-temperature chain oil and preparation method thereof

Abstract

The present invention provides a fully synthetic high-temperature chain oil, comprising the following components: 42-62 parts of coal-based synthetic oil CTL, 30-50 parts of polyethylene synthetic oil LPE, 3-10 parts of ester synthetic oil, 0.3-1 parts of high-temperature antioxidant, 0.5-1.5 parts of extreme pressure anti-wear agent, 0.1-0.8 parts of rust inhibitor, 0.1-0.6 parts of metal deactivator, 0.002-0.01 parts of demulsifier, and 0.002-0.02 parts of defoamer. The present invention also discloses a preparation method of the chain oil. The fully synthetic high-temperature chain oil provided by the present invention has the necessary properties of high-quality chain oil such as excellent high and low temperature performance, extreme pressure anti-wear protection performance, anti-rust and anti-corrosion performance and anti-emulsification performance, and also has a certain wear self-repairing function and a cost-effectiveness far exceeding similar products.

Description

Technical Field

[0001] The invention relates to the field of lubricating oil, and in particular to a fully synthetic high-temperature chain oil and a preparation method thereof. Background Art

[0002] As a common transmission device, transmission chain is widely used in various industries, such as hot rolling mills, cold rolling mills, continuous casting machines in the steel industry, glass quenching machines, glass melting furnaces in the glass industry, ceramic kilns, drying kilns in the ceramic industry, paint spraying and drying equipment in the automotive industry, heat setting machines, dryers and printing machines in the textile industry.

[0003] Most of these transmission chains use chain oil for lubrication and protection. Different applications have some subtle differences in the performance requirements of chain oil, but in general, there are the following common requirements for the performance of chain oil: excellent high and low temperature performance, small volatility and less coking at high temperature, good fluidity at low temperature, and wide applicable temperature range; excellent extreme pressure anti-wear protection performance, which can effectively reduce chain wear and extend its service life under certain loads; excellent anti-rust and anti-corrosion performance, which prevents ferrous and non-ferrous metals in equipment components such as chains and bearings from rusting or being corroded; excellent anti-emulsification performance, which can quickly separate water when water is mixed in to ensure the lubrication and protection performance of the oil. To meet the above excellent comprehensive performance, fully synthetic high temperature chain oil must be used. At present, fully synthetic high temperature chain oil mainly includes poly-α-olefin (PAO) base oil, which has become the basic component of mainstream chain oil in the market due to its high thermal oxidation stability, low temperature performance, excellent viscosity-temperature performance, and excellent shear stability and hydrolysis stability. However, due to the expensive raw materials, these three types of fully synthetic high-temperature chain oils are costly and sold at high prices, which increases the cost of oil use.

[0004] Therefore, it is necessary to develop a fully synthetic high-temperature chain oil that does not use poly-α-olefin (PAO) base oil, and whose comprehensive performance reaches or exceeds that of traditional poly-α-olefin products, and effectively reduces the oil cost of transmission chains in related industries while meeting the use requirements. Summary of the invention

[0005] Based on this, the present invention provides a fully synthetic high temperature chain oil and a preparation method thereof. The fully synthetic high temperature chain oil prepared by the present invention has excellent high and low temperature performance, extreme pressure and anti-wear protection performance, anti-rust and anti-corrosion performance and anti-emulsification performance.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A fully synthetic high-temperature chain oil comprises the following raw materials in parts by weight:

[0008] Coal-derived synthetic oil CTL 42-62 parts,

[0009] Polyethylene synthetic oil LPE 30-50 parts,

[0010] 3-10 parts of ester synthetic oil,

[0011] High temperature antioxidant 0.3-1 part,

[0012] 0.5-1.5 parts of extreme pressure anti-wear agent,

[0013] Rust inhibitor 0.1-0.8 parts,

[0014] 0.1 to 0.6 parts of metal deactivator,

[0015] Demulsifier 0.002-0.01 parts,

[0016] Defoaming agent 0.002~0.02 parts.

[0017] Furthermore, the fully synthetic high temperature chain oil comprises the following raw materials by weight:

[0018] Coal-derived synthetic oil CTL 44-59 parts,

[0019] Polyethylene synthetic oil LPE 32-48 parts,

[0020] 4-8 parts of ester synthetic oil,

[0021] High temperature antioxidant 0.5-0.8 parts,

[0022] 0.8-1.2 parts of extreme pressure anti-wear agent,

[0023] 0.2-0.6 parts of rust inhibitor,

[0024] 0.2-0.4 parts of metal deactivator,

[0025] Demulsifier 0.003-0.008 parts,

[0026] Defoaming agent 0.005-0.015 parts.

[0027] Furthermore, the coal-based synthetic oil CTL is CTL10.

[0028] Furthermore, the polyethylene synthetic oil LPE is one or both of LPE40 and LPE100.

[0029] Furthermore, the ester synthetic oil is one of polyol ester and trimellitic acid ester.

[0030] Furthermore, the high temperature antioxidant comprises two types: a shielded phenol type antioxidant and an aromatic amine type antioxidant, and the weight percentage of the two is 1:1.

[0031] Furthermore, the extreme pressure anti-wear agent is two or three of thiophosphate, borate and zinc dialkyl dithiophosphate.

[0032] Furthermore, the rust inhibitor is one of petroleum calcium sulfonate, long-chain carboxylic acid and alkenyl succinic acid.

[0033] Furthermore, the metal deactivator is one of a benzotriazole derivative and a thiadiazole derivative.

[0034] Furthermore, the demulsifier is a high molecular weight polyether demulsifier.

[0035] Furthermore, the defoaming agent is a silicon defoaming agent.

[0036] Furthermore, it also includes 0.5 to 1.2 parts of self-repairing additives, specifically including the following raw materials by weight:

[0037] Coal-derived synthetic oil CTL 44-59 parts,

[0038] Polyethylene synthetic oil LPE 32-48 parts,

[0039] 4-8 parts of ester synthetic oil,

[0040] High temperature antioxidant 0.5-0.8 parts,

[0041] 0.8-1.2 parts of extreme pressure anti-wear agent,

[0042] 0.2-0.6 parts of rust inhibitor,

[0043] 0.2-0.4 parts of metal deactivator,

[0044] Demulsifier 0.003-0.008 parts,

[0045] Defoaming agent 0.005-0.015 parts,

[0046] 0.5 to 1.2 parts of self-repairing additives.

[0047] The self-repairing additive is an extreme pressure anti-wear self-repairing lubricant additive with patent number CN105385481B, which makes the full chain oil not only have a cost-effectiveness far exceeding similar products, but also have a certain wear self-repairing function.

[0048] The preparation method of the above-mentioned fully synthetic high-temperature chain oil comprises the following steps:

[0049] S1. Mix coal-based synthetic oil CTL, polyethylene synthetic oil LPE, ester synthetic oil and high-temperature antioxidant uniformly by weight, heat to 60-70° C., and stir for more than 30 minutes until the high-temperature antioxidant is completely dissolved;

[0050] S2. Cool down to 50-60°C, add extreme pressure anti-wear agent, rust inhibitor, metal deactivator, anti-emulsifier, defoamer and self-repairing additive in sequence, stir for 30-40 minutes, and filter to obtain the finished product.

[0051] Furthermore, 0.2 to 0.8 parts of hexagonal boron nitride nanoparticles are included.

[0052] Hexagonal boron nitride nanoparticles have high chemical stability and do not react chemically with metals, thus avoiding the generation of corrosive substances. During the friction process, hexagonal boron nitride nanoparticles can effectively fill the tiny wear pits on the metal surface, reduce direct contact between metals and reduce the friction coefficient. At the same time, hexagonal boron nitride nanoparticles themselves have high thermal conductivity, which can effectively improve the overall heat dissipation performance of the oil in the chain oil system and accelerate the transfer of heat.

[0053] Furthermore, the particle size of the hexagonal boron nitride nanoparticles is 1-2 μm.

[0054] Improve wear resistance: These nanoparticles provide additional load-bearing capacity due to their hardness and stability, reduce oil film damage caused by heavy loads, and extend the service life of the lubricant.

[0055] The present invention uses 1-2 μm hexagonal boron nitride nanoparticles, which have a large specific surface area and can be fully dispersed in the system to improve the lubrication effect.

[0056] Furthermore, after adding the hexagonal boron nitride nanoparticles, pretreatment is required, and the preparation method includes the following steps:

[0057] S0. After premixing polyethylene synthetic oil LPE and hexagonal boron nitride nanoparticles, an ultrasonic device is used for cavitation treatment at a frequency of 60-100kHz for 15 to 25 minutes to form a pretreated mixed LPE; the nanoparticles can be effectively dispersed through the ultrasonic cavitation effect and evenly distributed in the LPE matrix, thereby improving the thermal conductivity and mechanical properties of the final material.

[0058] S1, the coal-based synthetic oil CTL, the pretreated mixed LPE obtained in step S0, the ester synthetic oil and the high-temperature antioxidant are uniformly mixed according to weight, heated to 60-70° C., and stirred for more than 30 minutes until the high-temperature antioxidant is completely dissolved;

[0059] S2. Cool down to 50-60°C, add extreme pressure anti-wear agent, rust inhibitor, metal deactivator, anti-emulsifier, defoamer and self-repairing additive in sequence, stir for 30-40 minutes, and filter to obtain the finished product.

[0060] The beneficial effects of the present invention are:

[0061] 1. The fully synthetic high-temperature chain oil prepared by the present invention has excellent high and low temperature performance, extreme pressure and anti-wear protection performance, anti-rust and anti-corrosion performance and anti-emulsification performance, which is no less than the traditional poly-α-olefin type, synthetic ester type and polyether type fully synthetic high-temperature chain oil. The application of the patented technology of self-repairing additives enables the fully synthetic high-temperature chain oil provided by the present invention to also have a certain wear self-repairing function, which can significantly extend the service life of the transmission chain equipment. The comprehensive performance is better than the traditional poly-α-olefin type, synthetic ester type and polyether type fully synthetic high-temperature chain oil.

[0062] 2. Creatively use the new material LPE synthetic oil, and optimize the best ratio of coal-based synthetic oil CTL, polyethylene synthetic oil LPE and ester synthetic oil in chain oil, which greatly reduces the cost and has a cost-effectiveness far exceeding traditional poly-α-olefin, synthetic ester and polyether fully synthetic high-temperature chain oils and other similar products. DETAILED DESCRIPTION

[0063] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0064] The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be purchased from the market.

[0065] The self-repairing additive selected in the embodiment of the present invention is the extreme pressure anti-wear self-repairing lubricating oil additive prepared in Example 4 of Patent No. CN105385481B.

[0066] The shielded phenol antioxidant, aromatic amine antioxidant, polymer polyether anti-emulsifier and silicone defoamer in the embodiment of the present invention are all commonly used components in lubricating oil products, and are not listed in detail here. As long as the components of the corresponding additives in the field of lubricating oils are met, they can be used in the preparation of the embodiment of the present invention. For example, as long as the shielded phenol antioxidant can be added to the lubricating oil product, it can be used as the shielded phenol antioxidant in the embodiment of the present invention.

[0067] In the following examples, unless otherwise specified, all parts are by weight.

[0068] Example 1

[0069] CTL10 synthetic oil, LPE40 synthetic oil, polyol ester synthetic oil, shielded phenol type antioxidant and aromatic amine type antioxidant are mixed uniformly according to weight, heated to 60-70°C, and stirred for more than 30 minutes until the shielded phenol type antioxidant and aromatic amine type antioxidant are completely dissolved;

[0070] Cool down to 50-60°C, add thiophosphate, borate, calcium petroleum sulfonate, benzotriazole derivative, polymer polyether anti-emulsifier, silicone defoamer in sequence, stir for 30-40 minutes, filter to obtain the finished product.

[0071] Example 2

[0072] CTL10 synthetic oil, LPE40 synthetic oil, polyol ester synthetic oil, shielded phenol type antioxidant and aromatic amine type antioxidant are mixed uniformly according to weight, heated to 60-70°C, and stirred for more than 30 minutes until the shielded phenol type antioxidant and aromatic amine type antioxidant are completely dissolved;

[0073] The temperature is lowered to 50-60°C, and thiophosphate, borate, calcium petroleum sulfonate, benzotriazole derivatives, high molecular weight polyether anti-emulsifier, silicone defoamer and self-repairing additive are added in sequence, stirred for 30-40 minutes, and filtered to obtain the finished product.

[0074] Example 3

[0075] CTL10 synthetic oil, LPE100 synthetic oil, trimellitate synthetic oil, shielded phenol type antioxidant and aromatic amine type antioxidant are mixed uniformly according to weight, heated to 60-70°C, and stirred for more than 30 minutes until the shielded phenol type antioxidant and aromatic amine type antioxidant are completely dissolved;

[0076] The mixture was cooled to 50-60°C, and borate, zinc dialkyl dithiophosphate, long-chain carboxylic acid, thiadiazole derivative, high molecular weight polyether anti-emulsifier, silicone defoamer and self-repairing additive were added in sequence. The mixture was stirred for 30-40 minutes and filtered to obtain the finished product.

[0077] Example 4

[0078] CTL10 synthetic oil, LPE40 synthetic oil, LPE100 synthetic oil, trimellitate synthetic oil, shielded phenol type antioxidant and aromatic amine type antioxidant are mixed uniformly according to weight parts, heated to 60-70° C., and stirred for more than 30 minutes until the shielded phenol type antioxidant and aromatic amine type antioxidant are completely dissolved;

[0079] The temperature is lowered to 50-60°C, and thiophosphate, borate, zinc dialkyl dithiophosphate, alkenyl succinic acid, thiadiazole derivatives, high molecular weight polyether anti-emulsifier, silicone defoamer and self-repairing additive are added in sequence, stirred for 30-40 minutes, and filtered to obtain the finished product.

[0080] Example 5

[0081] Hexagonal boron nitride nanoparticles of 1-2 μm are selected.

[0082] After LPE40 synthetic oil and hexagonal boron nitride nanoparticles are premixed, cavitation treatment is performed using an ultrasonic device at a frequency of 60-100 kHz for 15-25 minutes to form a pretreated mixed LPE40.

[0083] CTL10 synthetic oil, pre-treated mixed LPE40, LPE100 synthetic oil, trimellitate synthetic oil, shielded phenol type antioxidant and aromatic amine type antioxidant are mixed uniformly according to weight parts, heated to 60-70°C, and stirred for more than 30 minutes until the shielded phenol type antioxidant and aromatic amine type antioxidant are completely dissolved;

[0084] The temperature is lowered to 50-60°C, and thiophosphate, borate, zinc dialkyl dithiophosphate, alkenyl succinic acid, thiadiazole derivatives, high molecular weight polyether anti-emulsifier, silicone defoamer and self-repairing additive are added in sequence, stirred for 30-40 minutes, and filtered to obtain the finished product.

[0085] The difference between Example 6 and Example 7 and Example 5 is that the amounts of hexagonal boron nitride nanoparticles added in Example 6 and Example 7 are different, as shown in the formula table.

[0086] Comparative Example

[0087] An imported brand No. 150 fully synthetic high-temperature chain oil is available on the market.

[0088] The formulas of the fully synthetic high temperature chain oils prepared in Examples 1 to 7 are shown in Table 1.

[0089] Table 1 Formula of Example 1-7 Fully Synthetic High Temperature Chain Oil

[0090]

[0091]

[0092] The test data of the fully synthetic high temperature chain oil prepared in Examples 1 to 7 and the fully synthetic high temperature chain oil of the comparative example are shown in Table 2.

[0093] Table 2 Test data table of embodiments and comparative examples

[0094]

[0095]

[0096] As shown in Table 2, compared with the comparative example of a commercially available imported brand No. 150 fully synthetic high-temperature chain oil, the fully synthetic high-temperature chain oil of Examples 1 to 3 has the following advantages: higher flash point and smaller high-temperature volatility; lower pour point and better low-temperature fluidity; substantially equivalent carbon residue, all reaching an excellent level, with less coking after long-term use; higher four-ball sintering load, smaller four-ball long grinding spot diameter, and better extreme pressure and anti-wear protection performance; less copper sheet corrosion, and better protection for copper parts in the equipment; better anti-emulsification index and better oil-water separation performance; having a certain wear self-repair function, which similar commercially available products do not have; higher cost performance, and the selling price is less than half of that of the comparative example.

[0097] Combining the data of Example 1 with that of Examples 5-7, hexagonal boron nitride nanoparticles and self-repairing additives not only play their own unique roles in chain oil, but also have obvious synergistic effects with each other. Hexagonal boron nitride nanoparticles and self-repairing additives in the chain oil system realize self-repairing functions through physical adsorption and dissociative adsorption mechanisms, reduce friction coefficients, and enhance the load-bearing capacity and anti-wear properties of lubricants. At the same time, due to the high thermal conductivity, chemical stability and mechanical enhancement of hexagonal boron nitride, combined with coal-based synthetic oil CTL, polyethylene synthetic oil LPE and ester synthetic oil as base oils, especially polyethylene synthetic oil LPE, it can still stably exert its efficacy under high temperature, high pressure and harsh environments, extending the service life of lubricants and equipment. This synergistic effect greatly improves the comprehensive performance of lubricants, including better lubricity, oxidation resistance, corrosion resistance and thermal management capabilities, thereby significantly improving the efficiency of chain oils and the service life of equipment.

[0098] The above description shows that the fully synthetic high-temperature chain oil prepared by the present invention has excellent high and low temperature performance, extreme pressure and anti-wear protection performance, anti-rust and anti-corrosion performance and anti-emulsification performance, and has a certain wear self-repair function. The comprehensive performance is better than similar products, and the cost performance is far superior to similar products.

[0099] According to the disclosure of the above description, those skilled in the art to which the present invention belongs may also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A fully synthetic high temperature chain oil, characterized in that: It includes the following raw materials by weight: Coal-derived synthetic oil CTL 42-62 parts, Polyethylene synthetic oil LPE 30-50 parts, 3-10 parts of ester synthetic oil, High temperature antioxidant 0.3-1 part, 0.5-1.5 parts of extreme pressure anti-wear agent, Rust inhibitor 0.1-0.8 parts, 0.1 to 0.6 parts of metal deactivator, Demulsifier 0.002-0.01 parts, Defoaming agent 0.002-0.02 parts; It also includes 0.5 to 1.2 parts of a self-repairing additive, wherein the self-repairing additive is an extreme pressure anti-wear self-repairing lubricating oil additive prepared in Example 4 of Patent No. CN105385481B; The invention also comprises 0.2 to 0.8 parts of hexagonal boron nitride nanoparticles.

2. The fully synthetic high temperature chain oil according to claim 1, characterized in that: The coal-based synthetic oil CTL is CTL10.

3. The fully synthetic high temperature chain oil according to claim 1, characterized in that: The polyethylene synthetic oil LPE is one or both of LPE40 and LPE100.

4. The fully synthetic high temperature chain oil according to claim 1, characterized in that: The ester synthetic oil is one of polyol ester and trimellitic acid ester.

5. The fully synthetic high temperature chain oil according to claim 1, characterized in that: The high temperature antioxidant comprises two types: shielded phenol type antioxidant and aromatic amine type antioxidant, and the weight percentage of the two is 1:

1.

6. The fully synthetic high temperature chain oil according to claim 1, characterized in that: The extreme pressure anti-wear agent is two or three of thiophosphate, borate and zinc dialkyl dithiophosphate; the rust inhibitor is one of calcium petroleum sulfonate, long-chain carboxylic acid and alkenyl succinic acid; the metal deactivator is one of benzotriazole derivatives and thiadiazole derivatives; the anti-emulsifier is a polymer polyether anti-emulsifier; and the defoamer is a silicone defoamer.

7. A method for preparing a fully synthetic high temperature chain oil according to any one of claims 1 to 6, characterized in that: The steps include: S0, after premixing polyethylene synthetic oil LPE and hexagonal boron nitride nanoparticles, cavitation treatment is performed for 15-25 minutes at a frequency of 60-100kHz using ultrasonic equipment to form a pretreated mixed LPE; S1, the coal-based synthetic oil CTL, the pretreated mixed LPE obtained in step S0, the ester synthetic oil and the high-temperature antioxidant are uniformly mixed according to weight, heated to 60-70° C., and stirred for more than 30 minutes until the high-temperature antioxidant is completely dissolved; S2. Cool down to 50-60°C, add extreme pressure anti-wear agent, rust inhibitor, metal deactivator, anti-emulsifier, defoamer and self-repairing additive in sequence, stir for 30-40 minutes, and filter to obtain the finished product.

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