Industrial gear oil additive composition and method of making

Abstract

The application discloses an industrial gear oil additive composition and a preparation method thereof, which contains: A, at least one sulfur-containing extreme pressure anti-wear agent; the A component accounts for 25-87% by weight; B, at least one antioxidant; the B component accounts for 1-15% by weight; C, at least one phosphorus-containing anti-wear agent; the C component accounts for 5-30% by weight; D, at least one metal deactivator; the D component accounts for 1-10% by weight; E, at least one rust inhibitor; the E component accounts for 1-5% by weight; F, at least one ester base oil; and the F component accounts for 5-15% by weight. The lubricating oil additive composition of the application has excellent extreme pressure anti-wear performance, oxidation resistance, anti-foaming performance and rust and corrosion resistance, etc. The Timken test load reaches 311.4 N. Under the working conditions of high load and overload, the gear oil additive composition can effectively lubricate the gears and bearings and prolong the service life of the gear box.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lubricating oil additives, and particularly relates to an industrial gear oil additive composition and a preparation method of the industrial gear oil additive composition. BACKGROUND

[0002] Industrial gear oil is widely used in closed gear devices in the metallurgical, mining, metal processing and other industries. Industrial gear oil complex agent is a complex agent for preparing various viscosity grades of medium and heavy load industrial gear oil. With the development of science and technology and industrial production, gear transmission is developing towards small size, light weight, high speed, heavy load and high power. Therefore, the requirements for the oil used for gears are becoming more and more demanding, and the main development trend is to improve the performance of the product. Conventional industrial gear oil is widely used in closed gear devices in the steel, cement, mining and other industries, and can meet the lubrication requirements of most industrial gearboxes. However, in the metallurgical, mining and other industries, the use environment and conditions of the gear transmission system are relatively harsh, and some gearboxes are operated under high load and overload for a long time, so higher requirements are put forward for the extreme pressure carrying capacity of industrial gear oil. Some gearboxes of steel enterprises that bear extreme heavy load have problems such as tooth surface damage after using conventional L-CKD industrial gear oil. Conventional industrial gear oil has deficiencies in extreme pressure and wear resistance, and cannot meet the lubrication requirements of gears and bearings that bear extreme heavy load. SUMMARY

[0003] The purpose of the present application is to provide an industrial gear oil additive composition, which can prepare industrial gear oil with excellent extreme pressure and wear resistance, oxidation resistance, anti-foaming performance and rust and corrosion prevention performance.

[0004] Another purpose of the present application is to provide a preparation method of the industrial gear oil additive composition.

[0005] The technical solution adopted by the present application is an industrial gear oil additive composition, which contains:

[0006] A, at least one sulfur-containing extreme pressure and wear resistant agent; the content of component A is 25-87wt%;

[0007] B, at least one antioxidant; the content of component B is 1-15wt%;

[0008] C, at least one phosphorus-containing wear resistant agent; the content of component C is 5-30wt%;

[0009] D, at least one metal deactivator; the content of component D is 1-10wt%;

[0010] E, at least one rust inhibitor; the content of component E is 1-5wt%;

[0011] F, at least one ester base oil; F component 5-15wt%.

[0012] The present application is also characterized in that,

[0013] A component is sulfurized isobutylene, or alkyl polysulfide, or a mixture of any combination thereof.

[0014] B component is dialkyldiphenylamine, or alkylated diphenylamine, or dialkyldithiocarbamate, or sulfurized alkylphenol, or a mixture of any combination thereof.

[0015] C component is alkylated phosphite, or alkylated acid phosphate, or tricresyl phosphate, or alkylated thiophosphate and its derivatives, or a mixture of any combination thereof.

[0016] D component is alkylated benzotriazole and its derivatives, or heterocyclic sulfur-nitrogen compounds, or a mixture of any combination thereof.

[0017] E component is alkenyl succinic acid, or alkenyl succinic acid half ester, or alkyl orthophosphate, or alkyl phosphate and its ammonium salt, or a mixture of any combination thereof.

[0018] F component is a double ester, or trimethylolpropane oleate, or mono pentaerythritol ester, or dipentaerythritol ester, or a mixture of any combination thereof.

[0019] Another technical solution adopted by the present application is a preparation method of an industrial gear oil additive composition, specifically: first, add sulfur-containing extreme pressure anti-wear agent component A into a porcelain blending kettle with a stirrer, then add antioxidant component B, phosphorus-containing anti-wear agent component C, metal deactivator component D, rust inhibitor component E and ester oil component F into the blending kettle, stir for 4 hours at 60-70°C, until the mixture is completely dissolved and uniformly transparent, and the industrial gear oil additive composition is obtained.

[0020] The present application has the beneficial effects that: the present application carefully selects various additive components in the additive composition, in addition to considering the performance and advantages of each component functional additive, the main target is to improve the extreme pressure anti-wear performance, the main examination of the additive composition is the interaction relationship of various additives, to find the synergistic effect between the additives, to avoid the antagonistic effect, to achieve the balance and unity of the whole. Without affecting the rust and corrosion prevention, antioxidant and other properties, the extreme pressure anti-wear performance is effectively improved. To provide effective lubrication protection for gears and bearings under extreme heavy load. DETAILED DESCRIPTION

[0021] The present application will be described in detail below in combination with specific embodiments.

[0022] Example 1

[0023] The present invention relates to an industrial gear oil additive composition comprising:

[0024] (A) at least one sulphur containing extreme pressure anti-wear agent; the component (A) is sulphurised isobutylene, or alkyl polysulphide, or a mixture of any of them; the lubricating oil composition contains component (A) in an amount of 25 to 87% by weight;

[0025] (B) at least one antioxidant; the component (B) is dialkyldiphenylamine, or alkylated diphenylamine, or dialkyldithiocarbamic acid salt, or sulphurised alkyl phenol, or a mixture of any of them; the lubricating oil composition contains component (B) in an amount of 1 to 15% by weight;

[0026] (C) at least one phosphorus containing anti-wear agent; the component (C) is alkylated phosphite, or alkylated acid phosphate, or phosphoric acid trimethylphenyl ester, or alkylated thiophosphate and its derivatives, or a mixture of any of them; the lubricating oil composition contains component (C) in an amount of 5 to 30% by weight.

[0027] (D) at least one metal deactivator; the component (D) is alkylated benzotriazole and its derivatives, or heterocyclic sulphur nitrogen compound, or a mixture of any of them; the lubricating oil composition contains component (D) in an amount of 1 to 10% by weight.

[0028] (E) at least one rust preventive; the component (E) is alkenyl succinic acid, or alkenyl succinic acid half ester, or alkyl orthophosphate, or alkyl phosphate ester and its ammonium salt, or a mixture of any of them; the lubricating oil composition contains component (E) in an amount of 1 to 5% by weight.

[0029] (F) at least one ester base oil; the component (F) is diester, or trimethylolpropane oleic acid ester, or mono pentaerythritol ester, or di pentaerythritol ester, or a mixture of any of them; the lubricating oil composition contains component (F) in an amount of 5 to 15% by weight.

[0030] The present invention relates to an industrial gear oil additive composition comprising:

[0031] The industrial gear lubricating oil additive composition of the present application, the prepared L-CKD heavy load industrial gear oil has excellent extreme pressure anti-wear performance, oxidation resistance, anti-foaming performance and rust and corrosion prevention performance, etc., the Timken test load reaches 311.4N (70lb). In the high load, overload state working condition, effective lubrication protection is provided for gears and bearings, and the service life of the gear box is prolonged.

[0032] In order to screen additive components and additive compositions, various test methods are used in the laboratory for simulation evaluation. Among them, there are inhibitor mineral oil anti-rust test method in the presence of water (GB / T 11143 or ASTM D665B), extreme pressure performance determination method of lubricating oil (Timken test).

[0033] In order to evaluate whether the additive composition added to the base oil meets the national standard GB / T 5903-2011, petroleum product copper strip corrosion test method (GB / T 5096 or ASTM D130), determination method of anti-emulsification performance of lubricating oil (GB / T 8022 or ASTM D2711), determination method of load carrying capacity of lubricant (four-ball method) (GB / T 3142), determination method of anti-wear performance of lubricating oil (four-ball machine method) (NB / SH / T 0189) are carried out.

[0034] Example 2

[0035] The industrial gear lubricating oil additive composition (I) of the present application comprises: 46.5wt% of sulfided isobutylene (component A); 13.5wt% of dibutyl dithiocarbamate (component B); 5wt% of dialkyl dithiophosphate derivative, 5wt% of dodecyl phosphite, 5wt% of trimethylphenyl phosphate, 10wt% of tri-n-butyl phosphorothioate (component C); 2.5% of dialkyl aminomethylene benzotriazole (component D); 12.5wt% of pentaerythritol carboxylate (component F);

[0036] The industrial gear lubricating oil additive composition (II) comprises: 46.5wt% of sulfided isobutylene (component A); 13.5wt% of dibutyl dithiocarbamate (component B); 5wt% of dialkyl dithiophosphate derivative, 5wt% of dodecyl phosphite, 5wt% of trimethylphenyl phosphate, 10wt% of tri-n-butyl phosphorothioate (component C); 2.5% of dialkyl aminomethylene benzotriazole (component D); 2.5wt% of alkenyl succinic acid half ester (component E); 10wt% of pentaerythritol carboxylate (component F); composition (I) (II) is added to 320 base oil at 1.85wt%, and the evaluation results are shown in table 1 and table 2.

[0037] Table 1 320 base oil data

[0038]

[0039] Table 2 Evaluation results of composition (I) (II)

[0040] Item Composition (I) Composition (II) Liquid rust test Heavy rust No rust

[0041] The test results show that the alkenyl succinic acid half ester can effectively improve the rust prevention performance of the oil product.

[0042] Example 3

[0043] An industrial gear lubricating oil additive composition (III) comprising: 46.5 wt% of sulfurized isobutylene (component A); 13.5 wt% of dibutyl dithiocarbamate (component B); 5 wt% of a dialkyl dithiophosphate derivative, 5 wt% of dodecyl phosphite, 5 wt% of trimethylphenyl phosphate, 5 wt% of tri-n-butyl phosphorothioate, 5 wt% of acid phosphate dodecyl ammonium salt (component C); 2.5% of a dialkyl aminomethylene benzotriazole (component D); 2.5 wt% of an alkenyl succinic acid half ester (component E); 10 wt% of pentaerythritol carboxylate (component F); the composition (III) is added to 320 base oil at 1.85 wt%, and the analysis results are shown in Tables 3 and 4.

[0044] Reference oil: commercially available L-CKD320 gear oil of a certain brand.

[0045] Table 3 Evaluation results of composition (II) (III) and reference oil

[0046] Item Composition (II) Composition (III) Reference oil Timken test load / N 244.6 311.4 267

[0047] The test results show that the introduction of a certain amount of acid phosphate dodecyl ammonium salt in the formula can effectively improve the extreme pressure and wear resistance of the oil product. Compared with the reference oil, the Timken test load of the composition (III) reaches 311.4 N, which is 16.6% higher than that of the reference oil, and has more excellent extreme pressure and wear resistance.

[0048] Table 4 Evaluation results of composition (III)

[0049]

[0050]

[0051] The test results show that the 320 heavy-duty industrial gear oil prepared by adding the additive composition (III) at 1.85 wt% to the 320 base oil can meet the requirements of GB 5903-2011, and has excellent extreme pressure and wear resistance, oxidation resistance, anti-foaming performance, rust and corrosion prevention performance, etc. The Timken test load reaches 311.4 N, which is much higher than the requirement of not less than 267 N in GB 5903-2011.

[0052] The industrial gear oil prepared by the application has excellent extreme pressure and wear resistance, oxidation resistance, anti-foaming property and rust and corrosion resistance. The product can be used to prepare heavy-duty industrial gear oils of various viscosity grades such as 100, 220, 320, 460 and 680, which meet the GB 5903-2011 specification indexes with a 1.45-1.85 wt% additive dosage. The composition is convenient to prepare and has excellent performance, and has a wide application prospect.

Claims

1. The application of an industrial gear oil additive composition in L-CKD heavy-duty industrial gear oil, characterized in that, Industrial gear oil additive composition, which contains: 46.5 wt% isobutylene sulfide, component A; 13.5 wt% dibutyl dithiocarbamate, component B; 5 wt% dialkyl dithiophosphate derivative, 5 wt% dodecyl phosphite, 5 wt% tricresyl phosphate, 5 wt% tri-n-butyl trithiophosphate, 5 wt% dodecammonium acid phosphate, component C; 2.5 wt% dialkylaminomethylenetriazole, component D; 2.5 wt% alkenyl succinate half ester, component E; 10 wt% pentaerythritol carboxylic acid ester, component F.

2. The application as described in claim 1, characterized in that, The specific preparation method of the industrial gear oil additive composition is as follows: First, add sulfur-containing extreme pressure anti-wear agent component A to an enamel mixing kettle equipped with a stirrer. Then, add antioxidant component B, phosphorus-containing anti-wear agent component C, metal deactivator component D, rust inhibitor component E, and ester oil component F to the mixing kettle. Stir at 60-70℃ for 4 hours until the mixture is completely dissolved and becomes uniformly transparent to obtain the industrial gear oil additive composition.

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