A vacuum pump oil additive composition

Abstract

The application provides a vacuum pump oil additive composition. Raw materials of the vacuum pump oil additive composition include, in percentage by weight: 10-40% of ionic liquid; 20-60% of antioxidant; 1-10% of light stabilizer; and the balance of diluent; wherein the ionic liquid is selected from a compound having a general formula shown in formula I; in the formula, n is a positive integer of 12-18. The vacuum pump oil additive composition provided by the application improves the rust resistance, corrosion resistance and oxidation resistance of the lubricating oil composition by adding ionic liquid with a specific chemical structure, has good solubility, is not prone to discoloration, effectively prolongs the service life of the oil product, has excellent comprehensive performance, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil technology, and in particular to a vacuum pump oil additive composition. Background Technology

[0002] A vacuum pump is a device that uses mechanical, physical, and chemical methods to improve, generate, and maintain a vacuum in a closed space. It is the most basic vacuum-generating equipment in vacuum technology and is widely used in food packaging, semiconductors, and other fields. Vacuum pumps have certain requirements for the rust prevention, corrosion resistance, oxidation resistance, demulsification, and anti-foaming properties of lubricating oils, especially for rust prevention, corrosion resistance, and oxidation resistance.

[0003] While existing technologies can improve the various properties of vacuum pump oil additive compositions to some extent (e.g., rust prevention, corrosion resistance, oxidation resistance, demulsification, and anti-foaming properties), the degree of improvement is still limited. In particular, the rust prevention, corrosion resistance, and oxidation resistance of vacuum pump oil additive compositions are still difficult to meet current needs.

[0004] Therefore, there is an urgent need to provide a vacuum pump oil additive composition that combines superior rust prevention, corrosion resistance, and oxidation resistance. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a vacuum pump oil additive composition that, by adding an ionic liquid, possesses excellent rust prevention, corrosion resistance, and oxidation resistance.

[0006] To achieve the above objectives, the present invention provides a vacuum pump oil additive composition, wherein, by weight percentage, the raw materials of the vacuum pump oil additive composition include:

[0007] Ionic liquids: 10-40%;

[0008] Antioxidant content 20-60%;

[0009] Light stabilizer 1-10%;

[0010] Diluent balance;

[0011] The ionic liquid is selected from compounds having the general formula shown in Formula I:

[0012]

[0013] In the formula, n is a positive integer between 12 and 18.

[0014] According to a specific embodiment of the present invention, preferably, the raw materials of the vacuum pump oil additive composition, by weight percentage, include:

[0015] 20-30% ionic liquid;

[0016] Antioxidant 30-50%;

[0017] Light stabilizer 3-6%;

[0018] Diluent balance.

[0019] According to a specific embodiment of the present invention, preferably, the antioxidant comprises 60-90% phenolic antioxidant and 10-40% auxiliary antioxidant by weight percentage.

[0020] According to a specific embodiment of the present invention, preferably, the structure of the phenolic antioxidant is as follows:

[0021]

[0022] Where n is a positive integer between 12 and 18.

[0023] According to a specific embodiment of the present invention, preferably, the auxiliary antioxidant is pentaerythritol diphosphite, with the following structure:

[0024]

[0025] According to a specific embodiment of the present invention, preferably, the mass ratio of the phenolic antioxidant to the auxiliary antioxidant is 4:1.

[0026] According to a specific embodiment of the present invention, preferably, the light stabilizer is dimethyl sebacate.

[0027] According to a specific embodiment of the present invention, preferably, the diluent is HVI150 (Q / TSY44-2009 "General Lubricating Oil Base Oil").

[0028] According to a specific embodiment of the present invention, preferably, the raw materials of the vacuum pump oil additive composition, by weight percentage, include:

[0029] Ionic liquid, 30%; phenolic antioxidant, 20%; pentaerythritol diphosphite, 10%; dimethyl sebacate, 6%; HVI150, 34%;

[0030] The ionic liquid is selected from compounds having the general formula shown in Formula I:

[0031]

[0032] In the formula, n is 16;

[0033] The structure of the phenolic antioxidant is as follows:

[0034]

[0035] Where n is 16.

[0036] According to a specific embodiment of the present invention, preferably, the raw materials of the vacuum pump oil additive composition, by weight percentage, include:

[0037] Ionic liquid, 20%; Phenolic antioxidant, 40%; Pentaerythritol diphosphite, 10%; Dimethyl sebacate, 3%; HVI150, 27%;

[0038] The ionic liquid is selected from compounds having the general formula shown in Formula I:

[0039]

[0040] In the formula, n is 18;

[0041] The structure of the phenolic antioxidant is as follows:

[0042]

[0043] Where n is 18.

[0044] According to a specific embodiment of the present invention, the vacuum pump oil additive composition provided by the present invention can be obtained by mixing various raw materials together and stirring to mix them evenly.

[0045] The vacuum pump oil additive composition provided by this invention improves the rust prevention, corrosion resistance and oxidation resistance of the lubricating oil composition by adding ionic liquids with specific chemical structures. At the same time, it has good solubility, is not easy to discolor, effectively extends the service life of the oil, has excellent comprehensive performance, and has broad application prospects. Detailed Implementation

[0046] In order to provide a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solution of the present invention will now be described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0047] The ionic liquids used in the embodiments of this invention are selected from compounds having the general formula shown in Formula I:

[0048]

[0049] In the formula, n is a positive integer between 12 and 18.

[0050] The structure of the phenolic antioxidant used in the embodiments of the present invention is as follows:

[0051]

[0052] Where n is a positive integer between 12 and 18.

[0053] Example 1

[0054] This embodiment provides a vacuum pump oil additive composition, which comprises the following components by mass percentage:

[0055] Ionic liquid (n=12 in general formula) 10%; phenolic antioxidant (n=12 in general formula) 50%; pentaerythritol diphosphite 10%; dimethyl sebacate 1%; HVI150 29%.

[0056] Example 2

[0057] This embodiment provides a vacuum pump oil additive composition, which comprises the following components by mass percentage:

[0058] Ionic liquid (n=14 in the general formula) 40%; phenolic antioxidant (n=14 in the general formula) 10%; pentaerythritol diphosphite 10%; dimethyl sebacate 10%; HVI150 30%.

[0059] Example 3

[0060] This embodiment provides a vacuum pump oil additive composition, which comprises the following components by mass percentage:

[0061] Ionic liquid (n=16 in general formula) 30%; phenolic antioxidant (n=16 in general formula) 20%; pentaerythritol diphosphite 10%; dimethyl sebacate 6%; HVI150 34%.

[0062] Example 4

[0063] This embodiment provides a vacuum pump oil additive composition, which comprises the following components by mass percentage:

[0064] Ionic liquid (n=18 in general formula) 20%; phenolic antioxidant (n=18 in general formula) 40%; pentaerythritol diphosphite 10%; dimethyl sebacate 3%; HVI150 27%.

[0065] Comparative Example 1

[0066] This comparative example provides a vacuum pump oil additive composition comprising the following components by weight percentage:

[0067] Ionic liquid (n=12 in the general formula) 5%; phenolic antioxidant (n=12 in the general formula) 50%; pentaerythritol diphosphite 20%; dimethyl sebacate 0.5%; HVI150 24.5%.

[0068] Comparative Example 2

[0069] This comparative example provides a vacuum pump oil additive composition comprising the following components by weight percentage:

[0070] Ionic liquid (n=14 in general formula) 45%; phenolic antioxidant (n=14 in general formula) 5%; pentaerythritol diphosphite 10%; dimethyl sebacate 15%; HVI150 25%.

[0071] Comparative Example 3

[0072] This comparative example provides a vacuum pump oil additive composition with the same components as in Example 3, except that the vacuum pump oil additive composition of this comparative example does not contain ionic liquid, and the difference is made up by base oil.

[0073] Phenolic antioxidant (n=16 in the general formula) 20%; pentaerythritol diphosphite 10%; dimethyl sebacate 6%; HVI150 64%.

[0074] Comparative Example 4

[0075] This comparative example provides a vacuum pump oil additive composition with the same components as in Example 4, except that n is 8 in the ionic liquid formula of the vacuum pump oil additive composition of this comparative example.

[0076] Ionic liquid (n=8 in general formula) 20%; phenolic antioxidant (n=18 in general formula) 40%; pentaerythritol diphosphite 10%; dimethyl sebacate 3%; HVI150 27%.

[0077] Experimental Example

[0078] In this experimental example, the vacuum pump oil additive compositions from the above examples and comparative examples were blended with Group III hydrotreated base oil VHVI10 to form a vacuum pump oil, and then its performance was tested. The content of the vacuum pump oil additive composition in the vacuum pump oil was 1 wt%.

[0079] The vacuum pump oils containing the vacuum pump oil additive compositions of the above examples and comparative examples were tested for rust prevention and corrosion resistance using the methods specified in GB / T11143 and GB / T 5096, respectively. The degree of liquid phase rust, from light to heavy, was no rust, light rust, medium rust, and heavy rust, respectively, and the degree of copper sheet corrosion, from light to heavy, was 1a, 1b, 2a, 2b, and 2c, respectively. The test results are shown in Table 1.

[0080] Table 1. Test results of rust prevention and corrosion resistance of vacuum pump oil additive compositions.

[0081]

[0082] As shown in Table 1, the vacuum pump oil additive composition of the present invention has good rust prevention and corrosion resistance; Comparative Example 3 has the worst rust prevention and corrosion resistance. The ionic liquid of the present invention can significantly improve the rust prevention and corrosion resistance of the lubricating oil composition; Comparative Examples 1 and 2 did not achieve satisfactory rust prevention and corrosion resistance due to the excessively low or high amount of ionic liquid; Comparative Example 4 did not achieve the technical effect of the present invention because the carbon chain in the ionic liquid structure is relatively short.

[0083] The antioxidant properties of the vacuum pump oils containing the vacuum pump oil additive compositions of the above examples and comparative examples were tested using the methods specified in GB / T12581 and SH / T 0193, respectively. The test results are shown in Table 2.

[0084] Table 2. Antioxidant test results of vacuum pump oil additive compositions

[0085]

[0086]

[0087] As shown in Table 2, the vacuum pump oil additive composition of the present invention has good antioxidant properties; Comparative Example 3 has the worst antioxidant properties, and the ionic liquid of the present invention can significantly improve the antioxidant properties of the lubricating oil composition; Comparative Examples 1 and 2 did not achieve satisfactory antioxidant properties due to the excessively low or high amount of ionic liquid; Comparative Example 4 did not achieve the technical effect of the present invention because the carbon chain in the ionic liquid structure is relatively short.

[0088] Vacuum pump oils containing the vacuum pump oil additive compositions of the above examples and comparative examples were subjected to room temperature light storage and high temperature diffused light storage, respectively. The solubility and color change of the vacuum pump oil additive compositions were tested, and the test results are shown in Table 3.

[0089] Table 3. Antioxidant test results of vacuum pump oil additive compositions

[0090] project Storage under light at room temperature (100 days) High-temperature diffused light storage (168h) Example 1 Colorless and transparent Colorless and transparent Example 2 Colorless and transparent Colorless and transparent Example 3 Colorless and transparent Colorless and transparent Example 4 Colorless and transparent Colorless and transparent Comparative Example 1 Colorless and transparent Colorless and transparent Comparative Example 2 Colorless and transparent Colorless and transparent Comparative Example 3 Colorless and transparent Colorless and transparent Comparative Example 4 Colorless and turbid Colorless and turbid Test methods Visual inspection Visual inspection

[0091] As shown in Table 3, the vacuum pump oil additive composition of the present invention has good solubility and is not easily discolored; Comparative Example 4 did not achieve the technical effect of the present invention because the carbon chain in the ionic liquid structure is relatively short.

[0092] In summary, the vacuum pump oil additive composition prepared in the embodiments of the present invention has good rust prevention, corrosion resistance and oxidation resistance, as well as good solubility and is not prone to discoloration. In particular, it has excellent rust prevention, corrosion resistance and oxidation resistance.

Claims

1. A vacuum pump oil additive composition, wherein, The raw materials of this vacuum pump oil additive composition, by weight percentage, include: Ionic liquids: 10-40%; Antioxidant content 20-60%; Light stabilizer 1-10%; Diluent balance; The ionic liquid is selected from compounds having the general formula shown in Formula I: Equation I In the formula, n is a positive integer from 12 to 18; The light stabilizer is dimethyl sebacate; The diluent is HVI150.

2. The vacuum pump oil additive composition according to claim 1, wherein, The raw materials of this vacuum pump oil additive composition, by weight percentage, include: Ionic liquids 20-30%; Antioxidant content 30-50%; Light stabilizer 3-6%; Diluent balance.

3. The vacuum pump oil additive composition according to claim 1 or 2, wherein, The antioxidant comprises 60-90% phenolic antioxidants and 10-40% auxiliary antioxidants by weight percentage.

4. The vacuum pump oil additive composition according to claim 3, wherein, The structure of the phenolic antioxidant is as follows: Where n is a positive integer between 12 and 18.

5. The vacuum pump oil additive composition according to claim 3, wherein, The auxiliary antioxidant is pentaerythritol diphosphite, with the following structure: 。 6. The vacuum pump oil additive composition according to claim 3, wherein, The mass ratio of the phenolic antioxidant to the auxiliary antioxidant is 4:

1.

7. The vacuum pump oil additive composition according to any one of claims 1-6, wherein, The raw materials of this vacuum pump oil additive composition, by weight percentage, include: Ionic liquid, 30%; phenolic antioxidant, 20%; pentaerythritol diphosphite, 10%; dimethyl sebacate, 6%; HVI150, 34%; The ionic liquid is selected from compounds having the general formula shown in Formula I: Equation I In the formula, n is 16; The structure of the phenolic antioxidant is as follows: Where n is 16.

8. The vacuum pump oil additive composition according to any one of claims 1-6, wherein, The raw materials of this vacuum pump oil additive composition, by weight percentage, include: Ionic liquid, 20%; phenolic antioxidant, 40%; pentaerythritol diphosphite, 10%; dimethyl sebacate, 3%; HVI150, 27%; The ionic liquid is selected from compounds having the general formula shown in Formula I: Equation I In the formula, n is 18; The structure of the phenolic antioxidant is as follows: Where n is 18.

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