Low-sludge, low-volatility lubricating oil and its raw material composition and application

Abstract

The present invention relates to the field of lubricating oils and discloses a low-sludge, low-volatility lubricating oil, its raw material composition, and applications. The lubricating oil raw material composition of the present invention comprises, by weight, 80 to 90 parts of a hydrogenated base oil, 10 to 20 parts of an oil-soluble polyether, and an optional functional additive. The lubricating oil of the present invention is prepared from the lubricating oil raw material composition of the present invention. The lubricating oil of the present invention has the advantages of excellent oxidation stability, low sludge tendency, and low evaporation loss. It can effectively extend the service life of the oil product, reduce fuel consumption, ensure the normal operation of equipment, and has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the field of lubricating oil, and in particular to a low-sludge, low-volatility lubricating oil and a raw material composition and application thereof. Background Art

[0002] In a circulating system, lubricating oil oxidizes during use to produce products such as aldehydes, ketones, acids, and esters. These products, when mixed with water and impurities, inevitably form sludge. Sludge can clog oil lines, form carbon deposits on components, accelerate oil aging, and cause equipment failure.

[0003] In order to reduce the sludge-forming tendency of lubricating oils, synthetic esters are usually chosen as the main or partial base oil component. However, synthetic esters have defects such as poor hydrolytic stability and compatibility with sealing materials, which can easily cause adverse reactions such as increased acid value, corrosion, and leakage during the use of lubricating oils.

[0004] Therefore, a new type of lubricant is needed, which has the characteristics of low sludge and low volatility to extend the service life of the oil and ensure the normal operation of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems in the prior art of lubricating oils that occur during use due to the hydrolysis stability of the base oil synthetic ester component and the poor compatibility of sealing materials, such as increased oil acid value, corrosion, leakage and other adverse reactions. The present invention provides a new low-sludge, low-volatility lubricating oil and its raw material composition and application, so as to extend the service life of the oil and ensure the normal operation of equipment.

[0006] In order to achieve the above objectives, the present invention provides a lubricating oil raw material composition, characterized in that the composition comprises, by weight, 80 to 90 parts of hydrogenated base oil, 10 to 20 parts of oil-soluble polyether and optional functional additives.

[0007] A second aspect of the present invention provides a low-sludge, low-volatility lubricating oil, which is prepared from the lubricating oil raw material composition of the present invention.

[0008] The third aspect of the present invention provides the use of the lubricating oil raw material composition of the present invention and / or the lubricating oil of the present invention in the field of lubricating oil.

[0009] Through the above technical solution, the low-sludge, low-volatility lubricating oil provided by the present invention has the following advantages: excellent oxidation stability, low sludge tendency, low evaporation loss, etc., can effectively extend the service life of the oil, reduce oil consumption, ensure the normal operation of equipment, and has broad application prospects. DETAILED DESCRIPTION

[0010] The endpoints of the ranges and any values disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0011] The present invention provides a lubricating oil composition, which comprises, by weight, 80 to 90 parts of hydrogenated base oil, 10 to 20 parts of oil-soluble polyether and an optional functional additive.

[0012] In the present invention, as long as the purpose of the present invention can be achieved, the functional additive can be a conventional choice in the field. According to a preferred embodiment of the present invention, the functional additive is selected from one or more of antioxidants, metal deactivators, anti-wear agents, rust inhibitors, pour point depressants, and anti-foaming agents.

[0013] According to a preferred embodiment of the present invention, the functional additives contain antioxidants, metal deactivators, anti-wear agents, rust inhibitors, pour point depressants and anti-foaming agents.

[0014] According to a particularly preferred embodiment of the present invention, the weight ratio of the antioxidant, metal deactivator, antiwear agent, rust inhibitor, pour point depressant and antifoaming agent is 1-3:0.05-0.5:0.05-0.5:0.05-0.5:0.1-0.5:0.01-0.05.

[0015] By adopting the aforementioned preferred embodiment, the low sludge and low volatility properties of the lubricating oil can be further improved.

[0016] In the present invention, as long as the purpose of the present invention can be achieved, the antioxidant can be a conventional choice in the art. According to a preferred embodiment of the present invention, the antioxidant is selected from one or more of amine-type, phenol-type, and sulfur-nitrogen-type antioxidants.

[0017] According to a preferred embodiment of the present invention, the antioxidant is specifically selected from one or more of amine-type, phenol-type, and sulfur-nitrogen-type antioxidants, preferably a mixture of aromatic amine-type, phenolic ester-type, and thiocarbamate-type antioxidants, wherein the mass ratio of aromatic amine-type, phenolic ester-type, and thiocarbamate-type antioxidants is (1-3):(0.5-1):1. By adopting the above preferred embodiment, antioxidant properties can be further improved and volatility can be reduced.

[0018] In the present invention, as long as the purpose of the present invention can be achieved, the metal deactivator can be a conventional choice in the art. According to a preferred embodiment of the present invention, the metal deactivator is one or more of a benzotriazole derivative and a thiadiazole derivative, preferably a benzotriazole derivative.

[0019] According to a preferred embodiment of the present invention, the metal deactivator is specifically selected from one or more of N,N'-dialkylaminomethylenebenzotriazole and tolyltriazole derivatives, preferably tolyltriazole derivatives. By adopting the above preferred embodiment, the oxidation resistance, copper corrosion inhibition, and metal deactivation can be further improved.

[0020] In the present invention, as long as the purpose of the present invention can be achieved, the antiwear agent can be a conventional choice in the field. According to a preferred embodiment of the present invention, the antiwear agent is one or more of sulfur-containing and phosphorus-containing antiwear agents, preferably a phosphorus-containing antiwear agent.

[0021] According to a preferred embodiment of the present invention, the anti-wear agent is specifically selected from one or more of phosphate esters, phosphates, and phosphorus-sulfur compounds, preferably thiophosphates. By adopting the above preferred embodiment, the anti-wear property can be further improved.

[0022] In the present invention, as long as the purpose of the present invention can be achieved, the rust inhibitor can be a conventional choice in the art. According to a preferred embodiment of the present invention, the rust inhibitor is one or more of organic carboxylic acids and their salts, sulfonates, and heterocyclic compound rust inhibitors, preferably organic carboxylic acids and their salts.

[0023] According to a preferred embodiment of the present invention, the rust inhibitor is specifically selected from one or more of dodecenylsuccinic acid, n-oleyl sarcosine, and isononylphenoxyacetic acid, preferably isononylphenoxyacetic acid. By adopting the above preferred embodiment, the rust resistance can be further improved.

[0024] In the present invention, as long as the purpose of the present invention can be achieved, the pour point depressant can be a conventional choice in the art. According to a preferred embodiment of the present invention, the pour point depressant is one or more of alkyl naphthalene, polyesters, and polyolefins, preferably polyesters.

[0025] According to a preferred embodiment of the present invention, the pour point depressant is specifically selected from one or more of polymethacrylate and polyacrylate, preferably polymethacrylate. By adopting the above preferred embodiment, the low temperature performance can be further improved.

[0026] In the present invention, as long as the purpose of the present invention can be achieved, the antifoaming agent can be a conventional choice in the field. According to a preferred embodiment of the present invention, the antifoaming agent is one or more of silicon-type, non-silicon-type, and composite antifoaming agents, preferably a composite antifoaming agent.

[0027] According to a preferred embodiment of the present invention, the antifoaming agent is specifically selected from one or more of No. 1 composite antifoaming agent (T921), BAN 155 (Mengqingxin), and AF201, preferably BAN 155 (Mengqingxin). By adopting the above preferred embodiment, the antifoaming property can be further improved.

[0028] The antioxidant, metal deactivator, anti-wear agent, rust inhibitor, pour point depressant and anti-foaming agent of the present invention have a synergistic effect when used together, can further improve antioxidant properties, reduce volatility, reduce sludge tendency, and have good corrosion resistance, wear resistance, rust resistance, low-temperature fluidity and anti-foaming properties.

[0029] In the present invention, as long as the purpose of the present invention can be achieved, the oil-soluble polyether can be selected from a wide range. According to a preferred embodiment of the present invention, the kinematic viscosity of the oil-soluble polyether at 40° C. is 29 to 50 mm 2 / s, preferably 42 to 50 mm 2 By adopting the above preferred embodiment, the oxidation resistance and wear resistance can be further improved, and the generation of sludge can be suppressed.

[0030] In the present invention, as long as the purpose of the present invention can be achieved, the hydrogenated base oil can be selected from a wide range. According to a preferred embodiment of the present invention, the kinematic viscosity of the hydrogenated base oil at 40°C is 29 to 50 mm 2 / s.

[0031] According to a preferred embodiment of the present invention, the hydrogenated base oil is a Group II hydrogenated base oil and / or a Group III hydrogenated base oil. By adopting the aforementioned preferred embodiment, the oxidation resistance, viscosity-temperature resistance, and low-temperature resistance can be further improved.

[0032] The Class II and Class III hydrogenated base oils described in the present invention are Class II and Class III hydrogenated base oils in the API-1509 base oil classification standard.

[0033] According to a preferred embodiment of the present invention, the raw material composition contains, by weight, 80 to 90 parts of hydrogenated base oil, 10 to 20 parts of oil-soluble polyether, 1.0 to 3.0 parts of antioxidant, 0.05 to 0.5 parts of metal deactivator, 0.05 to 0.5 parts of antiwear agent, 0.05 to 0.5 parts of rust inhibitor, 0.1 to 0.5 parts of pour point depressant, and 0.01 to 0.05 parts of antifoaming agent.

[0034] According to a preferred embodiment of the present invention, the raw material composition contains, by weight, 82 to 85 parts of hydrogenated base oil, 12 to 15 parts of oil-soluble polyether, 1.5 to 2.5 parts of antioxidant, 0.1 to 0.3 parts of metal deactivator, 0.1 to 0.4 parts of antiwear agent, 0.1 to 0.3 parts of rust inhibitor, 0.2 to 0.4 parts of pour point depressant, and 0.02 to 0.04 parts of antifoaming agent.

[0035] The present invention provides a low-sludge, low-volatility lubricating oil, which is prepared by processing the raw material composition of the present invention.

[0036] The low-sludge, low-volatility lubricating oil of the present invention can be prepared by mixing the raw material composition of the present invention.

[0037] In the present invention, the mixing conditions are sufficient as long as the various raw materials are mixed evenly, and there is no limitation on the order of adding the components. According to a preferred embodiment of the present invention, the mixing conditions include: a mixing temperature of 75-85°C and a mixing time of 1-3 hours.

[0038] The present invention provides the low-sludge, low-volatility lubricating oil raw material composition of the present invention and / or the use of the low-sludge, low-volatility lubricating oil of the present invention in the field of lubricating oil.

[0039] The low-sludge, low-volatility lubricating oil of the present invention has the advantages of excellent oxidation stability, low sludge tendency, low evaporation loss, etc., can effectively extend the service life of the oil product, reduce oil consumption, ensure the normal operation of equipment, and has broad application prospects.

[0040] The present invention is further described below by means of specific examples. The scope of the present invention is not limited to the scope covered by the examples. The test methods and raw materials involved are specifically as follows:

[0041] Oxidation stability is measured by SH / T 0193-2008 method;

[0042] Volatility was measured using the GB / T 7325-1987 method;

[0043] Low sludge tendency is measured by SH / T 0124-2000 method;

[0044] Corrosion resistance is measured using the GB / T 5096-2017 method;

[0045] The wear resistance was measured using the NB / SH / T 0189-2017 method.

[0046] The hydrogenated base oils were commercially available products from Ssangyong of South Korea and Sinopec with grades 6 and 8;

[0047] The oil-soluble polyethers are OSP46 and OSP18 from Dow Chemical.

[0048] The antioxidants include L06 and L135 from BASF, T512 and T534 from Beijing Xingpu Company, V7723 and V887-E from Vanderbilt Company, T508 from Liaoning Tianhe Company, T323 from Shenyang Hualun Company, KT5135 from Jinzhou Kangtai Company, P4002 from Pacific Union Company and commercially available T531 and T501.

[0049] The metal deactivators are IR 39, IR T39 and IR TTA produced by BASF.

[0050] The anti-wear agents were T309 from Shenyang Weihua Company, IR353 from BASF Company and T321 from the market.

[0051] The rust inhibitors were IR NPA, Sarkosyl O and commercially available T746 from BASF.

[0052] The pour point depressants are VX1-248 and VX1-300 from Evonik and LZ7712 from Lubrizol.

[0053] Antifoaming agent: AF201 from Sinopec, BAN155 from Mengqingxin, and T921 from Shanghai Refinery.

[0054] Example 1

[0055] By weight, 82.02 parts of hydrogenated base oil (Korea Ssangyong No. 8, with a kinematic viscosity of 42 mm at 40 ° C) were added. 2 / s), 15 parts of oil-soluble polyether (Dow Chemical OSP46, kinematic viscosity at 40 ° C is 46mm 2 / s), 2 parts of antioxidant (1.1 parts of alkylated phenyl α-naphthylamine (L06), 0.4 parts of 2,6-di-tert-butyl-4-hydroxyphenyl propionate (T512), 0.5 parts of methylene (dibutyl dithiocarbamate) (V7723)), 0.2 parts of metal deactivator (tolutriazole derivative (IR39)), 0.25 parts of antiwear agent (triphenyl thiophosphate (T309)), 0.2 parts of rust inhibitor (dodecenylsuccinic acid (T746)), 0.3 parts of pour point depressant (polymethacrylate (VX1-248)), 0.03 parts of antifoaming agent (composite antifoaming agent AF201) were mixed at a mixing temperature of 80°C and a mixing time of 2 hours to obtain a lubricating oil. Performance tests were carried out, and the results are shown in Table 1.

[0056] Example 2

[0057] By weight, 84.98 parts of hydrogenated base oil (Sinopec No. 8, with a kinematic viscosity of 50 mm at 40 ° C) were added. 2 / s), 12 parts oil-soluble polyether (Dow Chemical OSP46, kinematic viscosity at 40 ° C is 42mm 2 The mixture was mixed with 2.5 parts of antioxidant (0.83 parts of alkylated diphenylamine (T534), 0.83 parts of phenolic ester antioxidant (T508), 0.83 parts of aminothioester (T323)), 0.1 parts of metal deactivator (tolyltriazole derivative (IR T39)), 0.1 parts of antiwear agent (dialkyl dithiophosphate (IR353)), 0.1 parts of rust inhibitor (isononylphenoxyacetic acid (IR NPA)), 0.2 parts of pour point depressant (polymethacrylate (LZ7712)), and 0.02 parts of antifoaming agent (composite antifoaming agent (BAN155)) at a mixing temperature of 75°C for 3 hours to obtain a lubricating oil. Performance tests were carried out, and the results are shown in Table 1.

[0058] Example 3

[0059] By weight, 83.06 parts of hydrogenated base oil (Sinopec No. 6, with a kinematic viscosity of 29 mm at 40 ° C) were added. 2 / s), 14 parts of oil-soluble polyether (kinematic viscosity at 40 ° C is 50mm 2 The mixture was mixed with 1.5 parts of antioxidant (1 part of N-phenyl-α-naphthylamine (T531), 0.17 parts of high molecular weight phenolic ester antioxidant (KT5135), 0.33 parts of thiocarbamate (P4002)), 0.3 parts of metal deactivator (tolutriazole (IR TTA)), 0.4 parts of antiwear agent (triphenyl thiophosphate (T309)), 0.3 parts of rust inhibitor (normal oleyl sarcosine (Sarkosyl O)), 0.4 parts of pour point depressant (polymethacrylate VX1-300), and 0.04 parts of antifoaming agent (composite antifoaming agent No. 1 (T921)) at a mixing temperature of 85°C for 1 hour to obtain a lubricating oil. Performance tests were conducted, and the results are shown in Table 1.

[0060] Example 4

[0061] The method of Example 2 was followed, except that 12 parts of oil-soluble polyether (Dow Chemical OSP46, with a kinematic viscosity of 42 mm at 40°C) was added. 2 / s)" is replaced by "12 parts oil-soluble polyether (Dow Chemical OSP18, kinematic viscosity at 40 ° C is 18mm 2 / s)". The results are shown in Table 1.

[0062] Example 5

[0063] By weight, 87.54 parts of hydrogenated base oil (Sinopec No. 8, with a kinematic viscosity of 50 mm at 40 ° C) were added. 2 / s), 10 parts oil-soluble polyether (Dow Chemical OSP46, kinematic viscosity at 40 ° C is 42mm2 A lubricating oil was prepared by mixing 1 part of aliphatic ester (0.5 parts / s), 1 part of antioxidant (0.33 parts T534, 0.33 parts T508, and 0.33 parts T323), 0.05 parts of a metal deactivator (IR T39), 0.5 parts of an antiwear agent (IR353), 0.4 parts of a rust inhibitor (IR NPA), 0.5 parts of a pour point depressant (LZ7712), and 0.01 parts of an antifoaming agent (BAN155) at 75°C for 3 hours. Performance tests were conducted, and the results are shown in Table 1.

[0064] Example 6

[0065] The method of Example 2 was followed, except that "2.5 parts of antioxidant (0.83 parts of T534, 0.83 parts of T508, and 0.83 parts of T323)" was replaced with "2.5 parts of antioxidant (1 part of 2,6-di-tert-butyl-p-cresol (T501), 0.9 parts of toluenetriazole (V887-E), and 0.6 parts of high molecular weight phenol (L135))". The results are shown in Table 1.

[0066] Example 7

[0067] The method of Example 2 was followed, except that 0.1 part of antiwear agent (dialkyl dithiophosphate (IR353)) was replaced with 0.1 part of antiwear agent (sulfurized isobutylene (T321)). The results are shown in Table 1.

[0068] Example 8

[0069] The method of Example 2 was followed, except that no antioxidant was added. The results are shown in Table 1.

[0070] Example 9

[0071] The method of Example 2 was followed, except that no metal deactivator was added. The results are shown in Table 1.

[0072] Example 10

[0073] The method of Example 2 was followed, except that no anti-wear agent was added. The results are shown in Table 1.

[0074] Comparative Example 1

[0075] The method of Example 2 was followed, except that the oil-soluble polyether was not added. The results are shown in Table 1.

[0076] Comparative Example 2

[0077] The method of Example 2 was followed, except that 12 parts of oil-soluble polyether (Dow Chemical OSP46, with a kinematic viscosity of 42 mm at 40°C) was added. 2 / s)” was replaced by “12 parts of di-2-ethylhexyl phthalate”. The results are shown in Table 1.

[0078] Table 1

[0079]

[0080]

[0081] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A lubricating oil raw material composition, characterized in that: The raw material composition is composed of the following substances: in parts by weight, 80-90 parts of hydrogenated base oil, 10-20 parts of oil-soluble polyether, 1.5-3.0 parts of antioxidant, 0.05-0.5 parts of metal deactivator, 0.05-0.5 parts of antiwear agent, 0.05-0.5 parts of rust inhibitor, 0.1-0.5 parts of pour point depressant, and 0.01-0.05 parts of antifoaming agent; The kinematic viscosity of the hydrogenated base oil at 40° C. is 29 to 50 mm 2 / s; The kinematic viscosity of the oil-soluble polyether at 40° C. is 29-50 mm 2 / s; The antioxidant is selected from a mixture of aromatic amine type, phenol ester type and thiocarbamate type antioxidants, and the mass ratio of aromatic amine type, phenol ester type and thiocarbamate type antioxidants is (1-3): (0.5-1): 1; The antiwear agent is a phosphorus-containing antiwear agent.

2. The composition according to claim 1, wherein The metal deactivator is one or more of benzotriazole derivatives and thiadiazole derivatives.

3. The composition according to claim 2, wherein The metal deactivator is a benzotriazole derivative.

4. The composition according to claim 1, wherein The rust inhibitor is selected from one or more of organic carboxylic acids and their salts, sulfonates, and heterocyclic compound rust inhibitors.

5. The composition according to claim 4, wherein The rust inhibitor is organic carboxylic acid and its salts.

6. The composition according to claim 1, wherein The pour point depressant is selected from one or more of alkyl naphthalene, polyesters, and polyolefins; and / or The antifoaming agent is selected from one or more of silicon-type, non-silicon-type and composite antifoaming agents.

7. The composition according to claim 6, wherein The pour point depressant is a polyester; and / or The antifoaming agent is a composite antifoaming agent.

8. The composition according to claim 1, wherein The hydrogenated base oil is a Group II hydrogenated base oil and / or a Group III hydrogenated base oil.

9. The composition according to claim 1, wherein The kinematic viscosity of the oil-soluble polyether at 40° C. is 42 to 50 mm 2 / s.

10. The composition according to any one of claims 1 to 9, wherein The raw material composition consists of the following substances: in parts by weight, 82-85 parts of hydrogenated base oil, 12-15 parts of oil-soluble polyether, 1.5-2.5 parts of antioxidant, 0.1-0.3 parts of metal deactivator, 0.1-0.4 parts of antiwear agent, 0.1-0.3 parts of rust inhibitor, 0.2-0.4 parts of pour point depressant, and 0.02-0.04 parts of antifoaming agent.

11. A low-sludge, low-volatility lubricating oil, characterized in that: The lubricating oil is prepared by processing the lubricating oil raw material composition according to any one of claims 1 to 9.

12. The lubricating oil according to claim 11, wherein the preparation method of the lubricating oil comprises: The lubricating oil raw material composition is mixed uniformly.

13. The lubricating oil according to claim 12, wherein The mixing conditions include: a mixing temperature of 75-85° C., and / or a mixing time of 1-3 hours.

14. Use of the lubricating oil raw material composition according to any one of claims 1 to 10 and / or the lubricating oil according to any one of claims 11 to 13 in the field of lubricating oils.

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