Vacuum pump oil additive composition

Abstract

The invention provides a vacuum pump oil additive composition. The vacuum pump oil additive composition comprises the following raw materials in percentage by weight: 10-40% of ionic liquid; 20 to 60% of an antioxidant; 1-10% of a light stabilizer; and the balance of diluent. Wherein the ionic liquid is selected from a compound with a general formula shown as a formula I: # imgabs0 #, and n is a positive integer from 12 to 18. According to the vacuum pump oil additive composition provided by the invention, by adding the ionic liquid with a specific chemical structure, the antirust property, corrosion resistance and oxidation resistance of the lubricating oil composition are improved, and meanwhile, the lubricating oil composition is good in solubility, not easy to discolor, capable of effectively prolonging the service life of an oil product, excellent in comprehensive performance and wide in application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oils, and in particular to a vacuum pump oil additive composition. 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. It is the most basic vacuum obtaining equipment in vacuum technology and is widely used in food packaging, semiconductors and other fields. The vacuum pump has certain requirements for the rust resistance, corrosion resistance, oxidation resistance, emulsification resistance and foam resistance of the lubricating oil, especially the rust resistance, corrosion resistance and oxidation resistance.

[0003] Although the prior art can improve the various properties of the vacuum pump oil additive composition to a certain extent (for example, rust resistance, corrosion resistance, oxidation resistance, demulsification resistance and foam resistance, etc.), the degree of improvement of the various properties of the vacuum pump oil additive composition is still limited, especially the rust resistance, corrosion resistance and oxidation resistance of the vacuum pump oil additive composition are still difficult to meet the current needs.

[0004] Therefore, there is an urgent need to provide a vacuum pump oil additive composition having better rust resistance, corrosion resistance and oxidation resistance. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a vacuum pump oil additive composition, which has excellent rust resistance, corrosion resistance and oxidation resistance by adding ionic liquid.

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

[0007] Ionic liquid 10-40%;

[0008] Antioxidants 20-60%;

[0009] Light stabilizer 1-10%;

[0010] Diluent residual amount;

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

[0012]

[0013] Wherein, n is a positive integer of 12-18.

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

[0015] Ionic liquid 20-30%;

[0016] Antioxidant 30-50%;

[0017] Light stabilizer 3-6%;

[0018] Diluent Remaining Amount.

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

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

[0021]

[0022] Wherein, n is a positive integer from 12 to 18.

[0023] According to a specific embodiment of the present invention, preferably, the auxiliary antioxidant is pentaerythritol bis diphosphite, and the structure is as follows:

[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 "Universal Lubricant Base Oil").

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

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

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

[0031]

[0032] Where n is 16;

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

[0034]

[0035] Among them, n is 16.

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

[0037] Ionic liquid, 20%, phenolic antioxidant, 40%; pentaerythritol bis diphosphite, 10%; dimethyl sebacate, 3%; HVI150, 27%;

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

[0039]

[0040] Where n is 18;

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

[0042]

[0043] Among them, 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 and mixing them uniformly.

[0045] The vacuum pump oil additive composition provided by the present invention improves the rust resistance, corrosion resistance and oxidation resistance of the lubricating oil composition by adding an ionic liquid with a specific chemical structure. At the same time, it has good solubility, is not easy to change color, effectively prolongs the service life of the oil product, has excellent comprehensive performance, and has broad application prospects. DETAILED DESCRIPTION

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

[0047] The ionic liquid used in the embodiment of the present invention is selected from compounds having the general formula shown in Formula I:

[0048]

[0049] Wherein, n is a positive integer of 12-18.

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

[0051]

[0052] Wherein, n is a positive integer from 12 to 18.

[0053] Example 1

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

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

[0056] Example 2

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

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

[0059] Example 3

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

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

[0062] Example 4

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

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

[0065] Comparative Example 1

[0066] This comparative example provides a vacuum pump oil additive composition, which includes the following components in percentage by mass:

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

[0068] Comparative Example 2

[0069] This comparative example provides a vacuum pump oil additive composition, which includes the following components in percentage by mass:

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

[0071] Comparative Example 3

[0072] This comparative example provides a vacuum pump oil additive composition, the components of which are the same as those of 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 bis diphosphite 10%; dimethyl sebacate 6%; HVI150 64%.

[0074] Comparative Example 4

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

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

[0077] Experimental example

[0078] In this experimental example, the vacuum pump oil additive composition of the above-mentioned embodiment and comparative example was blended with Class III hydrogenated base oil VHVI10 to prepare vacuum pump oil, and then the performance test was carried out. The content of the vacuum pump oil additive composition in the vacuum pump oil was 1wt%.

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

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

[0081]

[0082] As can be seen from Table 1, the vacuum pump oil additive composition of the present invention has good rust resistance and corrosion resistance; the rust resistance and corrosion resistance of Comparative Example 3 are the worst, and the ionic liquid of the present invention can significantly improve the rust resistance and corrosion resistance of the lubricating oil composition; Comparative Examples 1 and 2 do not achieve satisfactory rust resistance and corrosion resistance due to too low or too high dosage of ionic liquid; Comparative Example 4 still does not achieve the technical effect of the present invention due to the short carbon chain in the structural formula of the ionic liquid.

[0083] The vacuum pump oils to which the vacuum pump oil additive compositions of the above embodiments and comparative examples are added are tested for their antioxidant properties 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 composition

[0085]

[0086]

[0087] As can be seen from Table 2, the vacuum pump oil additive composition of the present invention has good antioxidant properties; the antioxidant property of Comparative Example 3 is the worst, and the ionic liquid of the present invention can significantly improve the antioxidant property of the lubricating oil composition; Comparative Examples 1 and 2 do not achieve satisfactory antioxidant properties due to the low or high dosage of the ionic liquid; Comparative Example 4 still does not achieve the technical effect of the present invention due to the short carbon chain in the structural formula of the ionic liquid.

[0088] The vacuum pump oil to which the vacuum pump oil additive composition of the above-mentioned embodiment and comparative example was added was stored under light at room temperature and stored under diffuse light at high temperature, and the solubility and color change of the vacuum pump oil additive composition were tested. The test results are shown in Table 3.

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

[0090] project Storage at room temperature with light (100 days) High temperature diffuse 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 turbid Colorless turbid Test methods Visual inspection Visual inspection

[0091] It can be seen from Table 3 that the vacuum pump oil additive composition of the present invention has good solubility and is not easy to change color; Comparative Example 4 does not achieve the technical effect of the present invention due to the short carbon chain in the ionic liquid structure.

[0092] In summary, the vacuum pump oil additive composition prepared in the embodiment of the present invention has good rust resistance, corrosion resistance and oxidation resistance, and at the same time has good solubility and is not easy to change color, and especially has relatively excellent rust resistance, corrosion resistance and oxidation resistance.

Claims

1. A vacuum pump oil additive composition, wherein: The raw materials of the vacuum pump oil additive composition include, by weight percentage: Ionic liquid 10-40%; Antioxidants 20-60%; Light stabilizer 1-10%; Diluent residual amount; Wherein, the ionic liquid is selected from compounds having the general formula shown in Formula I: Wherein, n is a positive integer of 12-18.

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

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

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

5. The vacuum pump oil additive composition according to claim 3 or 4, wherein: The auxiliary antioxidant is pentaerythritol bis diphosphite, and the structure is as follows:

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 claim 1 or 2, wherein: The light stabilizer is dimethyl sebacate.

8. The vacuum pump oil additive composition according to claim 1 or 2, wherein: The diluent is HVI150.

9. The vacuum pump oil additive composition according to any one of claims 1 to 8, wherein: The raw materials of the vacuum pump oil additive composition include, by weight percentage: Ionic liquid, 30%, phenolic antioxidant, 20%; pentaerythritol bis diphosphite, 10%; dimethyl sebacate, 6%; HVI150, 34%; Wherein, the ionic liquid is selected from compounds having the general formula shown in Formula I: Where n is 16; The structure of the phenolic antioxidant is as follows: Among them, n is 16.

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

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