Industrial gear oil additive composition and preparation method thereof

Abstract

The invention discloses an industrial gear oil additive composition and a preparation method thereof. The industrial gear oil additive composition comprises: A, at least one sulfur-containing extreme pressure anti-wear agent; the content of the component A is 25-87 wt%; b, at least one antioxidant; 1-15 wt% of a component B; c, at least one phosphorus-containing anti-wear agent; 5-30 wt% of a component C; d, at least one metal deactivator; 1-10 wt% of a component D; e, at least one antirust agent; 1-5 wt% of a component E; f, at least one ester base oil; and 5-15 wt% of an F-containing component. The L-CKD heavy-load industrial gear oil prepared from the lubricating oil additive composition has excellent extreme pressure anti-wear performance, oxidation resistance, anti-foaming performance, anti-rust and anti-corrosion performance and the like, and the Timken test load reaches 311.4 N. Under the working conditions of high load and overload, effective lubrication protection is provided for the gear and the bearing, and the service life of the gear box is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oil additives, and in particular relates to an industrial gear oil additive composition, and also relates to a preparation method of the industrial gear oil additive composition. Background Art

[0002] Industrial gear oil is widely used in closed gear devices in metallurgy, mining, metal processing and other industries. Industrial gear oil compound is a compound used to prepare medium and heavy-duty industrial gear oils of various viscosity grades. 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. For this reason, the requirements for the oil used in gears are becoming more and more stringent, and its main development trend is to improve the performance of the product. Conventional industrial gear oil is widely used in closed gear devices in steel, cement, mining and other industries, and can meet the lubrication needs of most industrial gearboxes. However, in metallurgy, mining and other industries, the use environment and conditions of the gear transmission system are relatively harsh, and some gearboxes operate under high load and overload for a long time, so high requirements are placed on the extreme pressure bearing capacity of industrial gear oil. Some gearboxes in steel enterprises that bear extremely heavy loads 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 anti-wear performance and cannot meet the lubrication needs of gears and bearings that bear extremely heavy loads. Summary of the invention

[0003] The purpose of the present invention is to provide an industrial gear oil additive composition, the industrial gear oil prepared by the additive composition has excellent extreme pressure anti-wear performance, antioxidant performance, anti-foaming performance and anti-rust and anti-corrosion performance.

[0004] Another object of the present invention is to provide a method for preparing the industrial gear oil additive composition.

[0005] The technical solution adopted by the present invention is that the industrial gear oil additive composition contains:

[0006] A, at least one sulfur-containing extreme pressure anti-wear agent; containing 25-87wt% of component A;

[0007] B, at least one antioxidant; containing 1 to 15 wt% of component B;

[0008] C, at least one phosphorus-containing antiwear agent; containing 5 to 30 wt% of component C;

[0009] D, at least one metal deactivator; containing 1 to 10 wt% of component D;

[0010] E, at least one rust inhibitor; containing 1 to 5 wt% of component E;

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

[0012] The present invention is also characterized in that:

[0013] The A component is sulfided isobutylene, or alkyl polysulfide, or any combination thereof.

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

[0015] Component C is alkylated phosphite, or alkylated acidic phosphate, or tricresyl phosphate, or alkylated thiophosphate and its derivatives, or any combination thereof.

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

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

[0018] The F component is a diester, or trimethylolpropane oleate, or monopentaerythritol ester, or dipentaerythritol ester, or a mixture of any combination thereof.

[0019] Another technical solution adopted by the present invention is a method for preparing an industrial gear oil additive composition, which specifically comprises: firstly adding a sulfur-containing extreme pressure anti-wear agent component A into an enamel blending kettle with a stirrer, and then adding an antioxidant component B, a phosphorus-containing anti-wear agent component C, a metal deactivator component D, a rust inhibitor component E and an ester oil component F into the blending kettle, and stirring at 60-70° C. for 4 hours until the mixture is completely dissolved and becomes uniform and transparent, thereby obtaining the industrial gear oil additive composition.

[0020] The beneficial effects of the present invention are as follows: the present invention carefully selects various additive components in the additive composition, and in addition to considering the performance and advantages of each component functional additive itself, takes the improvement of extreme pressure and anti-wear performance as the main goal, examines the interaction relationship of various additives in the additive composition mainly based on extreme pressure and anti-wear performance, and seeks the synergistic effect between the additives to avoid the antagonistic effect, and has reached an overall balance and unity. Under the premise of not affecting other properties such as anti-rust, anti-corrosion, and anti-oxidation, the extreme pressure and anti-wear performance are effectively improved. Effective lubrication protection is provided for gears and bearings that bear extremely heavy loads. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with specific implementation modes.

[0022] Example 1

[0023] The industrial gear oil additive composition of the present invention comprises:

[0024] (A) at least one sulfur-containing extreme pressure antiwear agent; (A) component is sulfurized isobutylene, or alkyl polysulfide, or a mixture of any combination thereof; the lubricating oil composition contains 25 to 87 wt% of component (A);

[0025] (B) at least one antioxidant; (B) component is dialkyl diphenylamine, or alkylated diphenylamine, or dialkyl dithiocarbamate, or sulfurized alkyl phenol, or a mixture of any combination thereof; the lubricating oil composition contains 1 to 15 wt% of component (B);

[0026] (C) at least one phosphorus-containing antiwear agent; component (C) is an alkylated phosphite, or an alkylated acidic phosphate, or tricresyl phosphate, or an alkylated thiophosphate and its derivatives, or a mixture of any combination thereof; the lubricating oil composition contains 5 to 30 wt% of component (C).

[0027] (D) at least one metal deactivator; (D) component is alkylated benzotriazole and its derivatives, or heterocyclic sulfur-nitrogen compounds, or a mixture of any combination thereof; the lubricating oil composition contains 1 to 10 wt% of component (D).

[0028] (E) at least one rust inhibitor; (E) component 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 combination thereof; the lubricating oil composition contains 1 to 5 wt% of component (E).

[0029] (F) at least one ester base oil; (F) component is diester, or trimethylolpropane oleate, or monopentaerythritol ester, or dipentaerythritol ester, or a mixture of any combination thereof; the lubricating oil composition contains 5 to 15 wt% of component (F).

[0030] The preparation method of the industrial gear oil additive composition of the present invention comprises the following steps: firstly, adding a required sulfur-containing extreme pressure anti-wear agent component (A) into an enamel blending kettle with a stirrer according to a proportion, and then adding a required antioxidant (B), a phosphorus-containing anti-wear agent (C), a metal deactivator (D), a rust inhibitor (E) and an ester oil (F) into the blending kettle according to a proportion, and stirring the blending kettle at 60-70° C. for 4 hours until the mixture is completely dissolved and becomes uniform and transparent, thereby obtaining the industrial gear oil additive composition;

[0031] The industrial gear lubricant additive composition of the present invention has excellent extreme pressure anti-wear performance, antioxidant performance, anti-foaming performance, anti-rust and anti-corrosion performance, etc., and the Timken test load reaches 311.4N (70lb). Under high load and overload conditions, it provides effective lubrication protection for gears and bearings and prolongs the service life of the gear box.

[0032] In order to screen additive components and additive compositions, the present invention uses various test methods in the laboratory for simulation evaluation, including the rust prevention test method of mineral oil with inhibitor in the presence of water (GB / T 11143 or ASTM D665B) and the extreme pressure performance test method of lubricating oil (Timken test).

[0033] In order to evaluate whether the additive composition meets the national standard GB / T 5903-2011 after being added to the base oil, the petroleum product copper strip corrosion test method (GB / T 5096 or ASTM D130), the lubricant anti-emulsification performance test method (GB / T8022 or ASTM D2711), the lubricant load-bearing capacity test method (four-ball method) (GB / T 3142), and the lubricant anti-wear performance test method (four-ball machine method) (NB / SH / T 0189) were carried out.

[0034] Example 2

[0035] The industrial gear lubricant additive composition (I) of the present invention comprises: 46.5 wt% of sulfurized isobutylene (component A); 13.5 wt% of dibutyl dithiocarbamate (component B); 5 wt% of dialkyl dithiophosphate derivatives, 5 wt% of dodecyl phosphite, 5 wt% of tricresyl phosphate, 10 wt% of tri-n-butyl trithiophosphate (component C); 2.5% of dialkylaminomethylenebenzotriazole (component D); 12.5 wt% of pentaerythritol carboxylate (component F);

[0036] An industrial gear lubricant additive composition (II) comprises: 46.5 wt% of sulfurized isobutylene (component A); 13.5 wt% of dibutyl dithiocarbamate (component B); 5 wt% of dialkyl dithiophosphate derivatives, 5 wt% of dodecyl phosphite, 5 wt% of tricresyl phosphate, 10 wt% of tri-n-butyl trithiophosphate (component C); 2.5 wt% of dialkylaminomethylenebenzotriazole (component D); 2.5 wt% of alkenyl succinic acid half ester (component E); 10 wt% of pentaerythritol carboxylate (component F); both compositions (I) and (II) are added to 320 base oil at 1.85 wt%, and the evaluation results are shown in Tables 1 and 2.

[0037] Table 1 320 base oil data

[0038]

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

[0040] project Composition (I) Composition (II) Liquid phase corrosion test Heavy Rust Rust-free

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

[0042] Example 3

[0043] An industrial gear lubricant additive composition (III) comprises: 46.5 wt% of sulfurized isobutylene (component A); 13.5 wt% of dibutyl dithiocarbamate (component B); 5 wt% of dialkyl dithiophosphate derivatives, 5 wt% of dodecyl phosphite, 5 wt% of tricresyl phosphate, 5 wt% of tri-n-butyl trithiophosphate, 5 wt% of acidic phosphate lauryl ammonium salt (component C); 2.5 wt% of dialkylaminomethylenebenzotriazole (component D); 2.5 wt% of alkenyl succinic acid half ester (component E); and 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: a certain brand of L-CKD320 gear oil on the market.

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

[0046] project 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 acidic phosphate ester dodecanum salt into the formula can effectively improve the extreme pressure and anti-wear properties of the oil. Compared with the reference oil, the Timken test load of the composition (III) reaches 311.4N, which is 16.6% higher than the reference oil, and has better extreme pressure and anti-wear properties.

[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 1.85wt% of the additive composition (III) to the 320 base oil can meet the requirements of GB5903-2011, and has excellent extreme pressure and anti-wear properties, antioxidant properties, anti-foaming properties, and anti-rust and anti-corrosion properties. The Timken test load reaches 311.4N, which is much higher than the requirement of not less than 267N in GB5903-2011.

[0052] The industrial gear oil prepared by the invention has excellent extreme pressure anti-wear performance, antioxidant performance, anti-foaming performance and anti-rust and anti-corrosion performance. The heavy-duty industrial gear oils of various viscosity grades such as 100, 220, 320, 460, 680 prepared with a dosage of 1.45-1.85wt% all meet the specification index of GB 5903-2011. The composition is easy to prepare, has excellent performance, and has broad prospects for promotion and application.

Claims

1. An industrial gear oil additive composition, characterized in that: It contains: A, at least one sulfur-containing extreme pressure anti-wear agent; containing 25-87wt% of component A; B, at least one antioxidant; containing 1 to 15 wt% of component B; C, at least one phosphorus-containing antiwear agent; containing 5 to 30 wt% of component C; D, at least one metal deactivator; containing 1 to 10 wt% of component D; E, at least one rust inhibitor; containing 1 to 5 wt% of component E; F, at least one ester base oil; containing 5 to 15 wt% of component F.

2. The industrial gear oil additive composition according to claim 1, characterized in that The component A is sulfurized isobutylene, or alkyl polysulfide, or a mixture of any combination thereof; a lubricating oil composition.

3. The industrial gear oil additive composition according to claim 1, characterized in that The B component is dialkyl diphenylamine, or alkylated diphenylamine, or dialkyl dithiocarbamate, or sulfurized alkylphenol, or any combination thereof.

4. The industrial gear oil additive composition according to claim 1, characterized in that The C component is an alkylated phosphite, or an alkylated acidic phosphate, or tricresyl phosphate, or an alkylated thiophosphate and its derivatives, or a mixture of any combination thereof.

5. The industrial gear oil additive composition according to claim 1, characterized in that The D component is alkylated benzotriazole and its derivatives, or heterocyclic sulfur-nitrogen compounds, or any combination thereof.

6. The industrial gear oil additive composition according to claim 1, characterized in that The E component is alkenyl succinic acid, or alkenyl succinic acid half ester, or alkyl orthophosphate, or alkyl phosphate ester and its ammonium salt, or any combination thereof.

7. The industrial gear oil additive composition according to claim 1, characterized in that The F component is a diester, or trimethylolpropane oleate, or monopentaerythritol ester, or dipentaerythritol ester, or a mixture of any combination thereof.

8. The method for preparing the industrial gear oil additive composition according to any one of claims 1 to 7, characterized in that: Specifically, the sulfur-containing extreme pressure anti-wear agent component A is first added into an enamel blending kettle with a stirrer, and then the antioxidant component B, the phosphorus-containing anti-wear agent component C, the metal deactivator component D, the rust inhibitor component E and the ester oil component F are added into the blending kettle, and stirred at 60-70°C for 4 hours until the mixture is completely dissolved and becomes uniform and transparent, thereby obtaining an industrial gear oil additive composition.

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