CN1403551A - A kind of gear lubricating oil additive composition - Google Patents

Abstract

The present invention provides a gear lubricating oil additive composition, which comprises (A) a certain amount of mineral oil and (B) at least one sulfur-containing extreme pressure additive; (C) at least one phosphorus-containing anti-wear additive; (D) at least one antirust additive; (E) at least one friction modifier; (F) at least one antioxidant or metal deactivator. The above-mentioned additive composition is added to the base oil in an amount of 4.5-4.8% (mass), and the vehicle gear oil meeting the specification index of GB13895-92 (API GL-5) can be prepared. The additive composition is added to the base oil in an amount of 1.2-2.0% (mass), and the industrial gear oil meeting the specification index of GB5903-95 can be prepared.

Description

A kind of gear lubricating oil additive composition

The invention relates to a lubricating oil additive composition, in particular to an additive composition for lubricating oil used in a gear transmission system, and belongs to the technical field of lubricating oil additives.

The main research direction of the gear lubricating oil compound is to improve the economy, adopt the ashless type, and improve the thermal stability. Improving the economy of the gear lubricant compound is mainly to reduce the dosage of the compound in the gear oil and reduce the production cost of the compound; the ashless gear oil compound has light color, good storage stability, and can be compounded with other types. The advantages of good compatibility with lubricants and good compatibility with base oil are the research directions of gear oil lubricant compound agents in the future; improving the thermal stability of gear lubricant compound agents is the need for the development of gear oil. Through domestic and foreign patent inquiries, no published patents with relevant content were found. At present, the most representative compound additives for gear lubricants in the international market are Anglamol 6085 from Lubrizol, G252 from Mobil, etc., but there are no public reports on the specific composition of the additives. The highest level of compound additives for gear lubricants in China is The additive is LAN4202 produced by Lanzhou Refining and Chemical Company, and the LAN4202 composite agent has applied for a Chinese patent (the application number is 97112343·8). Compared with the LAN4202 compound, the gear lubricating additive composition provided by the present invention has the following characteristics: 1. the technical economy is better; 2. the gear oil compound provided by the present invention is an ashless gear oil compound additive; 3. the present invention provides The gear oil compound has better thermal stability than LAN 4202.

The purpose of the present invention is: provide a kind of ashless gear lubricating oil composition, can be applicable to various base oils, the heavy-duty vehicle gear oil (API GL-5) that modulates with it meets GB 13895-92 specification requirement; The medium and heavy-duty industrial gear oil prepared with it meets the requirements of GB 5903-95.

In order to achieve the above purpose, the present invention carefully selects the additive components in the additive composition. In addition to considering the performance and outstanding advantages of the functional additives of each component, the compatibility of the additive with the base oil, the thermal oxidation Stability, rust resistance and wear resistance are one of the priority conditions. Therefore, it is far from being able to achieve the above-mentioned purpose only by the performance of each component of the additive, and it is necessary to conduct a comprehensive investigation on the compound effect among the various additives in the composition to achieve a comprehensive balance of the overall performance of the gear oil additive composition.

The gear oil composite agent prepared by the present invention has a sulfur content of 28.0-34.0% (mass), a phosphorus content of 1.5-2.5% (mass), a nitrogen content of 0.5-1.0% (mass), and has excellent thermal oxidation stability properties, anti-rust properties, extreme pressure anti-wear properties, anti-emulsification properties and compatibility with base oils. The heavy-duty vehicle gear oil of 80W/90, 85W/90, 80W/140, 85W/140, 90, 140 and other viscosity brands prepared with 4.5-4.8% (mass) dosage meets the requirements of GB 13895-92. Medium and heavy-duty industrial gear oils of 100, 150, 220, 320, 460, 680 and other viscosity grades prepared with 1.2-2.0% (mass) dosage meet the requirements of GB 5903-95 specifications. The product has low dosage, low production cost, wide application range and good economic and social benefits. The composite agent composition is convenient to prepare, has excellent performance, and has broad prospects for popularization and application.

The gear lubricant additive composition of the present invention contains: (A) a certain amount of mineral oil as diluent oil; and (B) at least one sulfur-containing extreme pressure additive; (C) at least one phosphorus-containing anti-wear Additives; (D) at least one antirust additive; (E) at least one friction modifier; (F) at least one antioxidant or metal deactivator. Said diluent oil (A) is highly refined medium viscosity index (MVI) or high viscosity index (HVI) mineral oil, and said additive composition contains 1-20% (mass) diluent oil (A); Said (B) is sulfurized isobutylene, said additive composition contains (B) component 30-90% (mass); said (C) is phosphorothioate and its amine salt derivatives, or phosphoric acid Esters and their amine salt derivatives, or thiophosphoryl esters and their amine salt derivatives, or phosphonate esters and their amine salt derivatives, or mixtures of any combination thereof, said additive composition, containing (C) component 10-50% (mass); said (D) is preferably fatty acid amide, or succinimide and its boride, or alkenyl succinate, or their arbitrary mixture, said additive Composition, containing (D) component 3～20% (mass); said (E) is preferably borated fatty acid ester, or benzotriazole fatty amine salt, or long-chain acidic phosphite, Or the mixture of any combination thereof, said additive composition, containing (E) component 1～10% (mass); Said (F) is preferably organic borate, or dinonyl diphenylamine, Or thiadiazole derivatives, or a mixture of any combination thereof, the additive composition contains 0.1-8% (by mass) of component (F).

Furthermore, the gear lubricating oil additive composition of the present invention contains: (A) a certain amount of mineral oil as diluent oil; and (B) at least one sulfur-containing extreme pressure additive; (C) at least one phosphorus-containing (D) at least one antirust additive; (E) at least one friction modifier; (F) at least one antioxidant or metal deactivator.

Wherein said (A) is highly refined MVI or HVI mineral oil, said additive composition, the suitable content containing (A) component is 3～10% (mass);

(B) component is preferably sulfurized isobutylene, and the suitable content of component (B) in the additive composition is 50-75% (mass);

(C) component is preferably phosphorothioate amine salt, or phosphate amine salt, or neutral phosphorothioate, or phosphonate amine salt, or the mixture of their random combination, and component (C) is in The suitable content in the additive composition is 14～40% (mass);

(D) component is preferably fatty acid amide, or boronated succinimide, or alkenyl succinate, or a mixture of any combination thereof, and the suitable content of component (D) in the additive composition is 5-15% (mass);

(E) component is preferably borated fatty acid ester, or benzotriazole fatty amine salt, or long-chain acidic phosphite, or the mixture of their random combination, component (E) in additive composition The suitable content is 2-8% (mass);

The (F) component is preferably organic borate ester, or dinonyl diphenylamine, or thiadiazole derivatives, or a mixture of any combination thereof, and the suitable content of component (F) in the additive composition is 1- 7% (by mass).

Preparation method: the preparation method of the above-mentioned gear oil additive composition is: first add the required diluent oil (A) in proportion to the enamel blending kettle with agitator, and then add the required proportion of sulfur-containing extreme pressure additive (B), phosphorus-containing anti-wear additive (C), and friction modifier (E) are added to the blending kettle, heated to 60-70°C and stirred for 2 hours, then cooled to 50-60°C and added with anti-rust additive ( D), antioxidant/or metal deactivator (F), and continue to stir for 2 hours at 50-60° C. until the mixture is uniform and transparent.

In order to screen the additive components and the additive composition, the present invention adopts various test methods in the laboratory for simulation evaluation. Among them are oven oxidation test, simulated L-33 test, simulated L-37 test, simulated L-42 test.

In order to evaluate whether the additive composition meets the national standard of GB 13895-92 after being added to the base oil, the copper sheet corrosion test method for petroleum products (GB/T5096 or ASTM D130), the foam property determination method for petroleum products (GB/T12579), and the anti-corrosion method are carried out. Scratch test (CRC L-42 or SH/T0519), bearing capacity test (CRC L-37 or SH/T0518), rust test (ASTM-STP-512A L-33 or SH/T0517), thermal oxidation stability test (ASTM D5704 or CRC L-60-1) thermal oxidation stability test (CRC L-60 or SH/T0520).

Effects of the present invention are further illustrated by the following examples. However, it should be understood that the following examples do not limit the scope of the present invention, and any modifications that do not exceed the concept and scope of the present invention are within the scope of the present invention.

Example 1:

Additive composition (I) comprising: 65.0% sulfurized isobutylene (component B); 8% trialkyl dithiophosphate (component C); 8% acid phosphate amine salt (component C) 10% borated succinimide (component D); 3% borated fatty acid ester (component E); 3% dinonyl diphenylamine (component F); 3% HVI500 diluent oil (component A). Additive composition (II) except component (C) 8% trialkyl phosphorodithioate is replaced by 8% trialkyl phosphoric acid ester, all the other are the same as composition (I), composition (I), composition (I), (II) Add 4.8% to 80W/90 base oil (the properties of 80W/90 base oil are listed in Table 1), and the evaluation results are listed in Table 2.

Table 1 80W/90 base oil properties project nature Kinematic Viscosity (100°C) mm ² /s-26°C Apparent Viscosity mPa·s Flash Point (Kelvin) Moisture % Machine Impurity % 19.26146400204 traces 0.008

Table 2 composition (I), (II) performance evaluation result project Composition (I) Composition (II) index Simulated L-42, simulated L-37 by load N, composite score points 53.385.21 <44.480.61 Not less than 53.38 and not more than 15

Experimental results show that trialkyl dithiophosphate can significantly increase the passing load of simulated L-42.

Example 2:

Additive composition (III) comprising: 50% sulfurized isobutylene (component B); 30% phosphonate amine salt (component C); 7% fatty acid amide (component D); 5% long-chain acidic phosphorous acid Esters (component E); 5% thiadiazole derivatives (component F); balance HVI500 diluent oil (component A). Additive composition (IV) is the same as composition (III) except that it does not contain 7% fatty acid amide (component D). Compositions (III) and (IV) were both added to No. 320 base oil at 1.4%, and their evaluation results are listed in Table 4.

Table 3 Properties of No. 320 base oil project nature Kinematic Viscosity (40°C) mm ² /s Pour Point°C Flash Point (Kelvin)°C Moisture % Machinery % 347.2-12218 traces 0.007

Table 4 composition (III), (IV) performance evaluation result project Composition (III) Composition (IV) D665B Rust Test (GB 11143) no rust heavy rust

The experimental results show that the fatty acid amide (component D) as an ashless antirust agent can significantly improve the antirust performance of the gear oil additive composition.

Example 3:

Additive composition (V) comprising: 75% sulfurized isobutylene (component B); 14% phosphorothioate amine salt (component C); 5% alkenyl succinate (component D); 2% Benzotriazole fatty amine salt (component E); 1% organic borate (component F); the balance is HVI500 diluent oil (component A). The additive composition (VI) is the same as the composition (V) except that it does not contain 1% organic borate (component F). Compositions (V) and (VI) were both added to 80W/90 base oil at 4.5%, and their evaluation results are listed in Table 5.

Table 5 composition (V), (VI) performance evaluation result project Composition (V) Composition (VI) Simulation of L-33 Oven Oxidation Test Cup Bottom Sludge no rust no light rust

The experimental results show that the organic borate (component F) can significantly improve the antirust performance and thermal stability of the gear oil additive composition.

Example 4:

Additive composition (VII) comprising: 70% sulfurized isobutylene (component B); 8% phosphorothioate (component C); 8% phosphate amine salt (component C); 6% fatty acid amide (component Part D); 3% benzotriazole fatty amine salt (component E); 2% organic borate (component F); 3% HVI500 diluent oil (component A). Composition (VII) was added at 4.8% to 80W/90 base oil and its bench results are listed in Table 6.

Table 6 composition (VII) bench evaluation result project 80W/90 GL-5 oil index Evaluation results Scratch Resistance Test (L-42) Load Capacity Test (L-37) through through through through Corrosion test (L-33) Corrosion score of cover plate Corrosion of gears, tooth surfaces, bearings and other parts Not less than 8.0 not more than no rust 9.32 Rust free Thermal Oxidation Stability (L-60-1) 100°C Kinematic Viscosity Growth % Pentane Insolubles % Toluene Insolubles % Big Gear Average Paint Film/Charcoal Score Average Sludge Score on Four Sides Not less than 100 not more than 3 not more than 2 not less than 7.5 not less than 9.4 95.50.4260.2788.749.71 Thermal Oxidation Stability (L-60) 100°C Kinematic Viscosity Growth % Pentane Insoluble % Toluene Insoluble % not less than 100 not more than 3 not more than 2 95.50.4260.278

The experimental results show that the additive composition (VII) is an ashless gear oil compound, and the heavy-duty vehicle gear oil prepared by adding 4.8% to the 80W/90 base oil not only passed the L-42, L-37, L -33, L-60 four gear stands, reached the GB 13895-92 (API GL-5) specification index, and also passed the L-60-1 stand, indicating that the thermal oxidation stability of the composition has reached New generation vehicle gear oil level (PG-2).

Claims (7)

1. A gear lubricant additive composition, characterized in that it contains: (A) a certain amount of diluent oil (mineral oil), which is deeply refined MVI or HVI mineral oil, and the composition contains 1-20% (mass) of component (A), (B) at least one sulfur-containing extreme pressure additive is sulfurized isobutylene, the composition contains components (B) 30-90% (mass), (C) At least one phosphorus-containing antiwear additive is phosphorothioate and its amine salt derivatives, or phosphoric acid ester and its amine salt derivatives, or phosphorothioate and its amine salt derivatives, or phosphonate and Its amine salt derivatives, or their mixture in any combination, the composition contains 10-50% (mass) of component (C), (D) at least one antirust additive, which is fatty acid amide, or succinimide and its boride, or alkenyl succinate, or a mixture of any combination thereof, the composition contains components (D) 3～ 20% (mass), (E) At least one friction modifier, which is borated fatty acid ester, or benzotriazole fatty amine salt, or long-chain acidic phosphite, or a mixture of any combination thereof, the composition contains component (E) 1 ~10% (mass), (F) at least one antioxidant or metal deactivator is an organic borate, or dinonyl diphenylamines, or thiadiazole derivatives, or a mixture of any combination thereof, and the composition contains the component (F ) 0.1 to 8% (mass). 2. The additive composition according to claim 1, characterized in that the suitable content of component (A) is 3-10% (by mass). 3. The additive composition according to claim 1, characterized in that the suitable content of component (B) is 50-75% (by mass). 4. The additive composition according to claim 1, characterized in that (C) component is phosphorothioate amine salt, or phosphate amine salt, or neutral phosphorothioate, or phosphonate amine salt, Or the mixture of any combination thereof, the content is 14-40% (mass). 5. The additive composition according to claim 1, characterized in that (D) component is fatty acid amide, or boronated succinimide, or alkenyl succinate, or the mixture of any combination thereof, the content 5 to 15% (mass). 6. The additive composition according to claim 1, characterized in that the suitable content of (E) component is 2-8% (by mass). 7. The additive composition according to claim 1, characterized in that the suitable content of component (F) is 1-7% by mass.