Vacuum pump oil additive, vacuum pump oil and vacuum pump

Abstract

The present invention provides a vacuum pump oil additive, vacuum pump oil and vacuum pump. The vacuum pump oil additive of the present invention comprises, by mass percentage, 5-50% of ionic liquid; 10-50% of antioxidant; 1-20% of rust inhibitor; 0.1-2% of demulsifier; 0.1-2% of antifoaming agent; and the remainder of diluent oil; wherein the ionic liquid comprises a structure of formula 1. The vacuum pump oil additive of the present invention has relatively excellent anti-oxidation, anti-rust, anti-corrosion, anti-wear and environmental friendliness.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oil, and in particular to a vacuum pump oil additive, vacuum pump oil and a vacuum pump. Background Art

[0002] A vacuum pump is a device that uses mechanical, physical, chemical and other methods to improve, generate and maintain vacuum in a closed space. In recent years, vacuum technology has developed rapidly, and vacuum equipment has been used in metallurgical forging, energy chemical industry, food packaging and other industrial fields. Therefore, vacuum pump oil, which is used in conjunction with various vacuum pumps, has ushered in new opportunities, and the market for vacuum pump oil has continued to expand. The lubrication parts of the vacuum pump are mainly the stator and rotor, shaft seal, gears and bearings in the cavity, and there are certain requirements for the oil's anti-oxidation, anti-wear, anti-rust, anti-corrosion and other properties.

[0003] Although the prior art can improve the various properties of vacuum pump oil to a certain extent (for example, antioxidant, anti-wear, rust resistance, corrosion resistance, anti-emulsification and anti-foaming properties), the degree of improvement of the various properties of vacuum pump oil is still limited, and there is still room for further improvement of the various properties of vacuum pump oil, especially the need to further improve the antioxidant and anti-wear properties of vacuum pump oil. In addition, the environmental friendliness of the vacuum pump oil in the prior art is poor. Therefore, it is urgent to provide an additive that can make the vacuum pump oil have better antioxidant, anti-wear, rust resistance, corrosion resistance and environmental friendliness. Summary of the invention

[0004] The invention provides a vacuum pump oil additive, which can make the vacuum pump oil have relatively excellent anti-oxidation, anti-rust, anti-corrosion, anti-wear and environmental friendliness.

[0005] The present invention provides a vacuum pump oil, which comprises the vacuum pump oil additive and thus has not only relatively excellent anti-oxidation, anti-rust, anti-wear and anti-corrosion properties, but also relatively excellent environmental protection.

[0006] The present invention provides a vacuum pump. Since the vacuum pump includes the vacuum pump oil, the gears, bearings and other parts of the vacuum pump have good corrosion resistance, oxidation resistance and other properties. The vacuum pump has a long service life and a wide range of applications.

[0007] The present invention provides a vacuum pump oil additive, which comprises, by mass percentage:

[0008]

[0009] Wherein, the ionic liquid comprises the following structure:

[0010]

[0011] Wherein, n is a positive integer selected from 6-14.

[0012] The vacuum pump oil additive as described above, wherein the content by mass percentage includes:

[0013]

[0014] The vacuum pump oil additive as described above, wherein the mass ratio of the antioxidant to the ionic liquid is 1:(0.5-2).

[0015] The vacuum pump oil additive as described above, wherein the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine, N,N'-sec-butyl-p-phenylenediamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0016] The vacuum pump oil additive as described above, wherein the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate and alkenylsuccinic acid.

[0017] The vacuum pump oil additive as described above, wherein the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, condensates of alkylphenols and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0018] The vacuum pump oil additive as described above, wherein the anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil, polymethacrylate, and polyacrylate.

[0019] The vacuum pump oil additive as described above, wherein the diluent oil is an inert neutral oil.

[0020] The present invention also provides a vacuum pump oil, which comprises the vacuum pump oil additive as described above.

[0021] The present invention also provides a vacuum pump, comprising the vacuum pump oil as described above.

[0022] The present invention provides a vacuum pump oil additive, which includes a specific content of ionic liquid, an antioxidant, a rust inhibitor, a demulsifier, an antifoaming agent and a diluent oil, wherein the ionic liquid includes a structure shown in Formula 1. Since the ionic liquid constituting the vacuum pump oil additive includes the structure shown in Formula 1, the vacuum pump oil additive has relatively excellent comprehensive performance. It is worth mentioning that the vacuum pump oil additive prepared using the ionic liquid also has relatively excellent environmental friendliness.

[0023] The vacuum pump oil of the present invention, because it includes the above-mentioned vacuum pump oil additive, not only has relatively excellent comprehensive performance, but also has good environmental protection and has a relatively broad application prospect.

[0024] The vacuum pump of the present invention comprises the above-mentioned vacuum pump oil, so the gears, bearings and other parts thereof have good corrosion resistance, oxidation resistance and other properties, and the vacuum pump has a long service life and a wide range of applications. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0026] The first aspect of the present invention provides a vacuum pump oil additive, which comprises, in terms of mass percentage:

[0027]

[0028] Among them, ionic liquids include the following structures:

[0029]

[0030] Wherein, n is a positive integer selected from 6-14.

[0031] The present invention does not limit the specific source of the ionic liquid. The ionic liquid can be prepared by a preparation method commonly used in the art, or it can be purchased commercially.

[0032] The antioxidant, rust inhibitor, demulsifier, antifoaming agent and diluent oil of the present invention are not particularly limited and can be selected from the antioxidants, rust inhibitors, demulsifiers, antifoaming agents and diluent oils commonly used in the art.

[0033] In the present invention, the vacuum pump oil additive includes the structure of Formula 1. On the one hand, the main component of the vacuum pump oil additive is the ionic liquid shown in Formula 1, which not only has good solubility, but also can show excellent compatibility when combined with other components. On the other hand, when the vacuum pump oil additive is used to prepare vacuum pump oil, it can significantly improve the anti-oxidation (high rotating oxygen bomb), anti-rust (qualified liquid phase rust), anti-corrosion (100°C, 3h copper sheet corrosion level is 1b), and wear resistance (gear machine load capacity failure level is 8) of the vacuum pump oil, especially improve the anti-oxidation and anti-wear properties of the vacuum pump oil.

[0034] It is worth mentioning that the ionic liquid does not contain sulfur and phosphorus elements. The use of the ionic liquid can reduce the content of sulfur and phosphorus elements in the vacuum pump oil additive as much as possible, or even make the vacuum pump oil additive free of sulfur and phosphorus elements, so that the vacuum pump oil additive also has excellent environmental friendliness and is convenient for industrial application.

[0035] Furthermore, when the vacuum pump oil additive comprises, by mass percentage:

[0036]

[0037] The vacuum pump oil additive has more excellent comprehensive properties (anti-oxidation, anti-rust, anti-corrosion, anti-wear).

[0038] In some embodiments of the present invention, in order to further improve the comprehensive performance of the vacuum pump oil additive, the mass ratio of the antioxidant to the ionic liquid is 1:(0.5-2).

[0039] In the present invention, the raw materials of antioxidant, rust inhibitor, demulsifier, antifoaming agent and diluent oil can be further selected to further improve the compatibility of each raw material and improve the comprehensive performance and environmental performance of the vacuum pump oil additive.

[0040] In some embodiments of the present invention, the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine, N,N'-sec-butyl-p-phenylenediamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0041] In some embodiments of the present invention, the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitol monooleate and alkenyl succinic acid. When the rust inhibitor is alkenyl succinic acid, the number of carbon atoms in the alkenyl group is 8-16.

[0042] In some embodiments of the present invention, the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, condensates of alkylphenols and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0043] The present invention does not particularly limit the oil-soluble polyether, and the oil-soluble polyether commonly used in the art can be selected.

[0044] In the present invention, the condensate of amine and ethylene oxide refers to a compound formed by a condensation reaction between the amino group in the amino compound and the epoxy group in ethylene oxide. The condensate of alkylphenol and ethylene oxide refers to a compound formed by a condensation reaction between the phenolic hydroxyl group in the alkylphenol and the epoxy group in ethylene oxide. The condensate of fatty alcohol and ethylene oxide refers to a compound formed by a condensation reaction between the hydroxyl group in the fatty alcohol and the epoxy group in ethylene oxide. The present invention does not limit the amount of the compound participating in the condensation reaction, nor does it specifically limit the specific conditions of the condensation reaction, as long as the above-mentioned condensation reaction can occur.

[0045] In the present invention, each condensate can also be obtained by commercial purchase.

[0046] In some embodiments of the present invention, the anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil, polymethacrylate, and polyacrylate.

[0047] In some embodiments of the present invention, the diluent oil is an inert neutral oil.

[0048] The present invention does not particularly limit the inert neutral oil, and the inert neutral oil may be selected from the inert neutral oil commonly used in the art. For example, the inert neutral oil may be HVI 150.

[0049] The present invention does not impose any particular limitation on the molecular weight of the above polymer.

[0050] The vacuum pump oil additive in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0051] The vacuum pump oil additive of the present invention not only has relatively excellent comprehensive performance (anti-oxidation, anti-rust, anti-corrosion, anti-wear) and environmental friendliness, but also has a simple preparation process, is easy to operate, and has a wide range of applications.

[0052] A second aspect of the present invention provides a vacuum pump oil, comprising the above-mentioned vacuum pump oil additive.

[0053] In the present invention, a certain amount of vacuum pump oil additive is mixed with a base oil commonly used in the art to obtain vacuum pump oil. Since the vacuum pump oil includes the above-mentioned vacuum pump oil additive, the vacuum pump oil has both relatively excellent comprehensive properties (anti-oxidation, anti-rust, anti-corrosion, anti-wear) and environmental friendliness, and can be used in stators and rotors, shaft seals, gears and bearings in various vacuum pump cavities to play a lubricating role.

[0054] A third aspect of the present invention provides a vacuum pump, comprising the above-mentioned vacuum pump oil.

[0055] In the present invention, since the stator and rotor, shaft seal, gear and bearing in the vacuum pump cavity contain the vacuum pump oil, the vacuum pump oil has a long service life and is widely used in industry.

[0056] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0057] The structural formula of the ionic liquid in each embodiment and comparative example is Formula 1, which is obtained through commercial purchase;

[0058]

[0059] Wherein n is a positive integer selected from 6-14.

[0060] The inert neutral oil in each embodiment and comparative example is HVI 150;

[0061] The alkenyl succinic acid in each embodiment and comparative example is T746;

[0062] The oil-soluble polyether in each embodiment and comparative example is DL32;

[0063] The condensate of amine and ethylene oxide in each embodiment and comparative example is T1001;

[0064] The polymethyl silicone oil in each embodiment and comparative example is T901;

[0065] The polymethacrylate in each embodiment and comparative example is T911;

[0066] The polyacrylate in each embodiment and comparative example is T912;

[0067] The Group II base oil in each embodiment and comparative example is HVIH12.

[0068] Example 1

[0069] The vacuum pump oil of this embodiment is obtained by mixing the vacuum pump oil additive shown in Table 1 with a Class II base oil:

[0070] Wherein, based on the total mass of the vacuum pump oil, the mass percentage of the vacuum pump oil additive is 1.5%.

[0071] Table 1

[0072] name Mass percentage / % Ionic liquid (n=6) 20 Dioctyldiphenylamine 40 Isononylphenoxyacetic acid 10 Oil soluble polyether 1 Polymethacrylate 1 Inert neutral oil 28

[0073] Example 2

[0074] The composition of the vacuum pump oil of this embodiment is substantially the same as that of the vacuum pump oil of Embodiment 1, except that the vacuum pump oil additive shown in Table 2 is used to replace the vacuum pump oil additive in Embodiment 1.

[0075] Table 2

[0076]

[0077]

[0078] Example 3

[0079] The composition of the vacuum pump oil of this embodiment is substantially the same as that of the vacuum pump oil of Embodiment 1, except that the vacuum pump oil additive shown in Table 3 is used to replace the vacuum pump oil additive in Embodiment 1.

[0080] Table 3

[0081] name Mass percentage / % Ionic liquid (n=12) 50 4,4'-Methylenebis(2,6-di-tert-butylphenol) 10 Succinic acid 20 Oil soluble polyether 1 Amine and ethylene oxide condensation product 1 Dimethicone 2 Inert neutral oil 16

[0082] Example 4

[0083] The composition of the vacuum pump oil of this embodiment is substantially the same as that of the vacuum pump oil of Embodiment 1, except that the vacuum pump oil additive shown in Table 4 is used to replace the vacuum pump oil additive in Embodiment 1.

[0084] Table 4

[0085]

[0086]

[0087] Example 5

[0088] The composition of the vacuum pump oil of this embodiment is substantially the same as that of the vacuum pump oil of Embodiment 1, except that the vacuum pump oil additive shown in Table 5 is used to replace the vacuum pump oil additive in Embodiment 1.

[0089] Table 5

[0090] name Mass percentage / % Ionic liquid (n=9) 15 Nonylbutyldiphenylamine 15 2,6-Di-tert-butyl-p-cresol 20 Sorbitan monooleate 6 Oil soluble polyether 0.5 Polymethyl silicone oil 0.5 Polyacrylate 0.5 Inert neutral oil 42.5

[0091] Example 6

[0092] The composition of the vacuum pump oil of this embodiment is substantially the same as that of the vacuum pump oil of Embodiment 1, except that the vacuum pump oil additive shown in Table 6 is used to replace the vacuum pump oil additive in Embodiment 1.

[0093] Table 6

[0094] name Mass percentage / % Ionic liquid (n=9) 30 Nonylbutyldiphenylamine 15 2,6-Di-tert-butyl-p-cresol 15 Sorbitan monooleate 6 Oil soluble polyether 0.5 Polymethyl silicone oil 0.5 Polyacrylate 0.5 Inert neutral oil 32.5

[0095] Comparative Example 1

[0096] The composition of the vacuum pump oil of this comparative example is substantially the same as that of the vacuum pump oil of Example 1, except that the vacuum pump oil additive shown in Table 7 is used to replace the vacuum pump oil additive in Example 1.

[0097] Table 7

[0098] name Mass percentage / % Dioctyldiphenylamine 40 Isononylphenoxyacetic acid 10 Oil soluble polyether 1 Polymethacrylate 1 Inert neutral oil 48

[0099] Comparative Example 2

[0100] The composition of the vacuum pump oil of this comparative example is substantially the same as that of the vacuum pump oil of Example 2, except that the vacuum pump oil additive shown in Table 8 is used to replace the vacuum pump oil additive in Example 2.

[0101] Table 8

[0102] name Mass percentage / % Ionic liquid (n=14) 4 Octylbutyldiphenylamine 10 2,6-Di-tert-butyl-p-cresol 10 Succinic acid 5 Amine and ethylene oxide condensation product 0.5 Polyacrylate 0.2 Dimethicone 0.2 Inert neutral oil 70.1

[0103] Comparative Example 3

[0104] The composition of the vacuum pump oil of this comparative example is substantially the same as that of the vacuum pump oil of Example 1, except that the vacuum pump oil additive shown in Table 9 is used to replace the vacuum pump oil additive in Example 1.

[0105] Table 9

[0106] name Mass percentage / % Ionic liquid (n=6) 3 Dioctyldiphenylamine 5 Isononylphenoxyacetic acid 0.5 Oil soluble polyether 0.05 Polymethacrylate 0.05 Inert neutral oil 91.4

[0107] Performance Characterization

[0108] 1. The performance of Class II base oil was tested. The test results are shown in Table 10.

[0109] Table 10

[0110] project Group II base oil Test methods <![CDATA[Kinematic viscosity (40 °C) / (mm 2 / s)]]> 107.0 GB / T 265 Viscosity Index 101 GB / T 2541 Pour point / ℃ -15 GB / T 3535 Flash point (open) / ℃ 278 GB / T 3536 Acid value / (mgKOH / g) 0.01 GB / T 4945 Moisture / % trace GB / T 260

[0111] 2. The vacuum pump oils in the embodiments and comparative examples were subjected to performance tests. The test results are shown in Table 11.

[0112] Table 11

[0113]

[0114] It can be seen from Table 11 that the vacuum pump oil prepared in the embodiment of the present invention has relatively excellent anti-oxidation, anti-rust, anti-corrosion and anti-wear properties, especially has relatively excellent anti-oxidation and anti-wear properties.

[0115] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum pump oil additive, characterized in that: According to the mass percentage, it includes: Wherein, the ionic liquid comprises the following structure: Wherein, n is 6, 9, 12 or 14; The mass ratio of the antioxidant to the ionic liquid is 1:(0.5-2); The antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine, N,N'-sec-butyl-p-phenylenediamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

2. The vacuum pump oil additive according to claim 1, characterized in that The rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate and alkenylsuccinic acid.

3. The vacuum pump oil additive according to claim 1 or 2, characterized in that: The demulsifier is selected from at least one of oil-soluble polyether, condensation product of amine and ethylene oxide, condensation product of alkylphenol and ethylene oxide, and condensation product of fatty alcohol and ethylene oxide.

4. The vacuum pump oil additive according to claim 1 or 2, characterized in that: The anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil, polymethacrylate and polyacrylate.

5. The vacuum pump oil additive according to claim 3, characterized in that: The anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil, polymethacrylate and polyacrylate.

6. The vacuum pump oil additive according to claim 1, 2 or 5, characterized in that: The diluent oil is an inert neutral oil.

7. The vacuum pump oil additive according to claim 3, characterized in that: The diluent oil is an inert neutral oil.

8. The vacuum pump oil additive according to claim 4, characterized in that The diluent oil is an inert neutral oil.

9. A vacuum pump oil, characterized in that: The vacuum pump oil additive comprises the vacuum pump oil additive according to any one of claims 1 to 8.

10. A vacuum pump, characterized in that: Comprising the vacuum pump oil according to claim 9.

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