RU2573829C1 - Transmission oil - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to transmission oil, which as basic oil contains mixture of dibasic acid ester Syntolux L with viscosity from 2.0 to 6.0 mm²/s at 100°C and mineral oil with viscosity from 2.0 to 10 mm²/s at 100°C, and, in addition, pack of additives additionally contains thickening additive Syntolux V, which represents vinylalkyl polymer with viscosity from 200 to 5000 mm²/s at 100°C and molecular weight from 3000 to 20000, with the following component ratio, wt %: phenyl-α-napthylamine 0.2-0.6; 4-methyl-2,6-di-tert-butylphenol 0.75-1.25; anglamol-99 7.0-9.0; liquid chlorinated paraffins CP-470 6.5-7.5; benzotriazole 0.1-0.2; antifoaming agent "PENTA-4604" 0.01-0.05; thickening additive Syntolux V 5-30; basic oil to 100, including: ester Syntolux L with viscosity from 2.0 to 6.0 mm²/s at 100°C 5-50; mineral oil with viscosity from 2.0 to 10 mm²/s at 100°C 50-95.

EFFECT: increase of corrosion resistance, improvement of low-temperature and tribological characteristics of transmission oil.

4 ex, 1 tbl

Description

The invention relates to the field of gear oils used in various types of automotive transmissions, including hypoid gears, in a wide temperature range from -50 to + 120 ° C.

Known gear oil for gears based on mineral, synthetic oil or a mixture thereof with the addition of 0.1-5.0% dithiocarbamate and 0.1-10.0% pentaerythritol ester and C ₁₂ -C ₂₀ fatty acids having a hydroxyl number from 20 to 100 mg KOH / g (Application US 20100113314, 2010).

Known lubricating oil for mechanical, automatic and continuously variable transmissions of automobiles or industrial gear systems, containing an incomplete ester of polyhydric alcohol and carboxylic acid in an amount of from 5 to 75% and having a kinematic viscosity at a temperature of 100 ° C from 1.0 to 15 mm ² / s, and the composition has a kinematic viscosity at a temperature of 100 ° C from 1.0 to 20 mm ² / s, polyhydric alcohol is an alcohol from diatomic to hexatomic, and carboxylic acid is selected from the group including monobasic acids, polybasic acids and mixtures thereof (Patent RU 2501846, 2012).

Known lubricant composition for gearboxes containing at least one methyl ester of a fatty acid and either at least one compound selected from the group of heavy poly-α-olefins with a kinematic viscosity at 100 ° C from 300 to 1200 mm ² / s, or not less than one compound selected from the group of light poly-α-olefins with kinematic viscosity at 100 ° C from 1.5 to 3.0 mm ² / s in combination with one or more compounds such as polymethacrylates (Patent RU 2509145, 2014) .

Known oil for lubricating transmission units of passenger front-wheel drive vehicles, containing, by weight. %: sulfur-containing additive, which is the product of the interaction of the fraction of α-olefins with sulfur monochloride when heated, 3.8; zinc dialkyl dithiophosphate - 0.5; polymethacrylate - 1.5; organosilicon additive - 0.003; and petroleum oil (Patent RU 2533422, 2014). The disadvantage of this gear oil is a pour point of minus 33 ° C.

The objective of the invention is to develop a gear oil composition having improved low temperature and extreme pressure properties that meets the requirements of TU 38.1011238-89 amended. 1-4.

The technical result of the present invention is to increase corrosion resistance, improve low-temperature and tribological characteristics, which helps to increase fuel economy. To achieve the technical result, lubricating oil contains an optimal additive package, including antiwear, anti-seize, dispersant, anti-corrosion, anti-oxidizing, anti-rust and anti-foam additives, Syntolux V thickening additive, which is a vinyl vinyl polymer with a viscosity of 200 to 5000 mm ² / s at 100 ° c and a molecular weight of from 3,000 to 20,000, in an amount to provide a viscosity of the finished gear oil not less than 9.0 mm ² / s at 100 ° c, and the base oil is a mixture of a two ester primary acid Syntolux L having a viscosity of 2.0 to 6.0 mm ² / s at 100 ° C in an amount of 5-50 wt. % and mineral oil with a viscosity of from 2.0 to 10 mm ² / s at 100 ° C in an amount of 50-95 wt. %

To illustrate the essence of the proposed technical solution, 4 oil samples were prepared, which should not be construed as limiting the scope of the invention.

The technology for preparing oil samples includes the following steps:

- preparation of base oil;

- thickening base oil;

- dosage of additives in the base oil;

- mixing until complete dissolution of the additives for at least 0.5 hours at a temperature of 70-80 ° C;

- cooling and filtering the resulting oil.

For the preparation of oil samples used an additive package consisting of: phenyl-α-naphthylamine (Neozone "A") - 0.2-0.6; 4-methyl-2,6-di-tert-butylphenol (agidol-1) 0.75-1.25; Anglamol-99 - 7.0-9.0; chlorinated liquid paraffins HP-470 - 6.5-7.5; benzotriazole - 0.1-0.2; antifoam "PENTA-4604" - 0.01-0.05 wt. %

In addition, a sample of gear oil contains, by weight. %:

Example 1

Thickener additive Syntolux V 20 having a viscosity of at least 2000 mm ² / s at 100 ° C - 13;

Base oil up to 100.

As the base oil used a mixture containing, by weight. %:

Syntolux L 124 ester with a viscosity at 100 ° C 2.4 mm ² / s - 10;

Mineral oil with a viscosity at 100 ° C 3.6 mm ² / s - 90.

Example 2

Thickener additive Syntolux V 15 having a viscosity of at least 1000 mm ² / s at 100 ° C - 15;

Base oil up to 100.

As the base oil used a mixture containing, by weight. %:

Ester Syntolux L 132 having a viscosity at 100 ° C 3,2 mm ² / s - 10;

Mineral oil with a viscosity at 100 ° C 3.6 mm ² / s - 90.

Example 3

Thickening additive Syntolux V 10 with a viscosity of at least 500 mm ² / s at 100 ° C - 17;

Base oil up to 100.

As the base oil used a mixture containing, by weight. %:

Syntolux L 140 ester with a viscosity at 100 ° C 4.0 mm ² / s - 15;

Mineral oil having a viscosity at 100 ° C 3,6 mm ² / s - 85.

Example 4

Syntolux V 7 thickening additive with a viscosity of at least 200 mm ² / s at 100 ° C - 24;

Base oil up to 100.

As the base oil used a mixture containing, by weight. %:

Syntolux L 147 ester with viscosity at 100 ° C 4.7 mm ² / s - 15;

Mineral oil with a viscosity at 100 ° C 3.6 mm ² / s - 85.

The data shown in table 1, confirm the high efficiency of the proposed structure. So, the use of a combination of components in the proposed oil can significantly improve the viscosity and tribological characteristics, as well as the corrosion stability of the oil compared to the prototype. As a prototype taken oil TS ₃ -9 gip production of LLC PKF Rusma.

From the data given in table 1, it follows that the proposed transmission oil surpasses commercial oil TC ₃ -9 gip in low temperature and tribological characteristics, as well as in corrosion resistance and mechanical degradation.

Claims (1)

Gear oil, characterized in that, as a base oil, it contains a mixture of dibasic ester Syntolux L with a viscosity of from 2.0 to 6.0 mm ² / s at 100 ° C and mineral oil with a viscosity of from 2.0 to 10 mm ² / s at 100 ° C, and in addition, the additive package additionally contains a thickening additive Syntolux V, which is a vinyl alkyl polymer with a viscosity of 200 to 5000 mm ² / s at 100 ° C and a molecular weight of 3000 to 20,000, in the following ratio components, wt.%:
phenyl-α-naphthylamine 0.2-0.6 4-methyl-2,6-di-tert-butylphenol 0.75-1.25 anglamol-99 7.0-9.0 chlorinated liquid paraffins HP-470 6.5-7.5 benzotriazole 0.1-0.2 antifoam "PENTA-4604" 0.01-0.05 Syntolux V thickening additive 5-30 base oil up to 100, including: ester Syntolux L with a viscosity of 2.0 to 6.0 mm ² / s at 100 ° C 5-50 mineral oil with a viscosity of 2.0 to 10 mm ² / s at 100 ° C 50-95