RU2627766C1 - High-temperature multi-purpose universal lubricant - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to a multi-purpose universal high-temperature lubricant intended for use in friction units of loaded industrial equipment, modern vehicles, industrial, construction and marine equipment operating at a temperature of -35°C to +160°C, under conditions of high humidity and acidity. Multi-purpose universal high-temperature lubricant includes mineral oil, thickener and antioxidant, anti-scuffing, adhesion and anticorrosive additives. It additionally contains High-tech 343, Anglamol-99 or Anglamol 33 as an antifriction additive including phosphorus, sulfur and nitrogen, 1,2,3 benzotriazole as a corrosion inhibitor, and a dye-pigment, blue phthalocyanine. Isobutylene polymer is used as a thickener, zinc dialkyl dithiophosphate is used as an anticorrosive and antiwear additive, Akor-1 in the form of a nitrated oil of M-8 type with 10-11% of technical stearin is used as an anticorrosive additive, Agidol-1(4-methyl-2,6-di-tert-butylphenol), Naftam-2 or Diphenylamine is used as an antioxidant additive of phenolic type, and the following is used as a mineral oil: a mixture of three highly purified mineral base oils consisting of a residual oil component, a distillate III vacuum residue oil component and a low-hardening oil component, taken in the ratio of 3:1:2, with the following ratio of components, wt %: complex lithium soap of 12-hydroxystearic acid 18-26; 1,2,3 benzotriazole 0.3-0.8; Akor-1 0.4-0.8; isobutylene polymer 1.0-2.0; zinc dialkyl dithiophosphate 0.3-0.7; High-tech 343, Anglamol-99 or Anglamol-33 1.5-2.5; Agidol-1(4-methyl-2,6-di-t-butylphenol), Naftam-2 or Diphenylamine 0.3-1.0; blue phthalocyanine pigment 0.7-1.2; mixture of mineral base oils - the rest.

EFFECT: creation of a universal multi-purpose high-temperature antifriction lubricant, capable of operating in a wide temperature range with a high upper limit of use, which has a low cost.

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Description

The present invention relates to a multi-purpose universal high-temperature grease intended for use in friction units of loaded industrial equipment, modern vehicles, industrial, construction and ship equipment operating at temperatures from -35 ° C to + 160 ° C, in conditions of high humidity and acidity .

Imported lubricants Mobilgrease ХНР 222 of the Exxonmobil company and Shell Gadus S3 V220C 2 of the Shell oil company are known, obtained on the basis of a lithium complex and high-quality paraffin base oils with the addition of additives. Currently, in the current economic situation, the use of these lubricants is difficult due to their high cost. Their replacement is required with domestic lubricants, not inferior in technical characteristics, but less expensive.

Known domestic lubricants with lower cost. For example, Konstalin-1 grease is known, including oil and an additive (see VV Sinitsyn, Handbook, “Greases in the USSR,” Moscow, “Chemistry”, 1984, p. 80).

In the composition of the mixture, a mixture of mineral oils of high and medium viscosity, for example, industrial or aviation, transformer AC, instrument MVP, is used as the basis. As a thickener in a known lubricant, Na-Sami of castor oil is used in an amount of 21% and as an additive water up to 0.75%. Lubrication 1-13 is intended for lubrication of rolling friction and sliding friction units of mechanisms and machines operating at temperatures from -20 ° С to + 110 ° С.

The disadvantages of this lubricant are the low dropping point, as well as low extreme pressure properties, which limits its use in the field of high temperatures. The grease is made on sodium soap, which makes it impossible to use it in high humidity conditions.

The closest in composition and technical characteristics to the proposed lubricant, adopted as a prototype, is Litin-2 lubricant, which includes mineral oil, a thickener and additives antioxidant, anti-seize, adhesive and anticorrosive (see V. A. Likhanov, PP Devetyarov, “Plastic lubricants ”, Textbook, Kirov, Vyatka State Agricultural Academy, 2006, p. 48). In addition, it contains aerosil and antiwear additives.

The main operational characteristics of the known lubricant are high tribological and adhesive properties, however, this lubricant has a low upper limit of application + 120 ° C. It is operable at temperatures from -40 to + 120 ° C (see TU 0254-311-00148820-96).

The technical task of the invention is the creation of a universal multi-purpose high-temperature antifriction grease, operable in a wide temperature range with a high upper limit of application, replacing imported analogues and having a lower cost.

The technical problem is solved in that the multi-purpose universal high-temperature lubricant includes mineral oil, a thickener and antioxidant, anti-seize, adhesive and anticorrosive additives, while it additionally contains High Tech 343, Anglamol-99 or Anglamol 33 as an antifriction additive that includes phosphorus, sulfur and nitrogen , 1,2,3 Benzotriazole as a corrosion inhibitor and dye - a blue phthalocyanine pigment, while as a thickener - isobutylene polymer, as an anti-corrosion and anti-corrosion agent a significant additive is zinc dialkyldithiophosphate; as an anticorrosion additive, Akor-1 in the form of nitrated oil of type M-8 with 10-11% technical stearin; as an antioxidant additive of the phenolic type Agidol-1 (4-methyl-2,6-di tert-butylphenol), Naphtham-2 or Diphenylamine, and as a mineral oil it contains a mixture of three highly refined mineral base oils, consisting of a component of residual oils, a component of distillate III vacuum oils, and a component of low-setting oils, taken respectively in a ratio of 3 : 1: 2, in the following ratio of components in wt. %:

complex lithium soap 12-hydroxystearic acid 18-26 1,2,3 Benzotriazole 0.3-0.8 Acor-1 0.4-0.8 isobutylene polymer 1.0-2.0 zinc dialkyldithiophosphate 0.3-0.7 HiTech 343, Anglamol-99 or Anglamol-33 1.5-2.5 Agidol-1 (4-methyl-2,6-di-tert-butylphenol), Naphtham-2 or diphenylamine 0.3-1.0 blue phthalocyanine pigment 0.7-1.2 a mixture of mineral base oils rest

Use for the preparation of the proposed lubrication of a mixture of oils consisting of a highly refined residual component obtained according to the traditional scheme from oil tar (deasphalting, selective cleaning and dewaxing), which has high kinematic viscosity at 100 ° C (18-25 cSt) and good lubricating properties, low-setting component of low viscosity (2.5-3.7 cSt) and low pour point obtained by the hydrocatalytic method from a distillate raffinate and a component of distillate oil oils III vacuum A single overhead obtained according to the traditional purification scheme from distillate raw materials with kinematic viscosity at 100 ° C in the range of 6.5-7.5 cSt ensures optimal pumpability in the lubricant and effective viscosity at -30 ° C in the range of 1500-1900 Pa⋅s that allows you to achieve the optimal result on the viscosity-temperature and friction characteristics of the lubricant.

The proposed lubricant is operational in the claimed temperature range from -35 ° C to + 160 ° C, the protective properties (power and speed loading) are improved, the lubricant pumpability and resistance to aggressive environments are improved.

The use of complex lithium soap in the composition of the lubricant leads to an increase in the dropping point and a decrease in oil separation, and an improvement in the mechanical and thermal properties. Complex lithium greases are durable, stable, they often fill bearings and friction units for the entire period of operation.

An additive composition is selected in the lubricant, which provides excellent protection of the lubricated parts from corrosion at high humidity, high resistance to oxidative degradation during operation at elevated temperatures.

The proposed lubricant provides excellent corrosion protection, is resistant to water leaching, which allows it to be used in rolling mills, marine equipment, mechanisms for the construction of tunnels and mining, machines and mechanisms operating underground, ore crushing and concentration plants, where water and moisture is present in excess.

The basis of the proposed lubricant is a mixture of three highly refined mineral base oils: a component of residual oils, a component of distillate III vacuum oils and a component of low-setting oils taken in a ratio of 3: 1: 2 (see STO 00148599-029-2013).

In addition, the grease contains:

- complex lithium soap of 12-hydroxystearic acid - 18-26 wt. %;

- corrosion inhibitor 1,2,3 Benzotriazole - 0.3-0.8 wt. %;

- anticorrosion additive Acor-1 (nitrated oil type M-8 with 10-11% technical stearin) - 0.4-0.8 wt. %;

- thickening additive - isobutylene polymer - 1.0-2.0 wt. %;

- anti-corrosion and anti-wear additive zinc dialkyl dithiophosphate - 0.3-0.7 wt. %;

- anti-friction additive - 1.5-2.5 wt. %, which is used as HiTech 343, Anglamol-99 or Anglamol-33 containing phosphorus, sulfur and nitrogen;

- antioxidant additive of phenolic type - 0.3-1.0 wt. %, which is used as Agidol-1 (4-methyl-2,6-di-tert-butylphenol), Naphtham-2 or Diphenylamine;

- dye - blue phthalocyanine pigment - 0.7-1.2 wt. %

The proposed lubricant is prepared by saponification of 12-hydroxystearic, sebacic and boric acids in the presence of water and a dispersion medium (a mixture of highly refined mineral base oils) with lithium hydroxide, water evaporation and heat treatment when heated to a temperature of 195-210 ° C, followed by dilution to the desired consistency with a mixture of highly refined mineral base oils, the addition of an additive package, a dye to identify the lubricant and homogenization of the resulting composition.

To identify the advantages of the proposed lubricant in relation to the prototype, samples were made, the composition of which is shown in table 1 and the corresponding tests were carried out to determine the characteristics given in table 2.

The tests were carried out on the basis of the methods approved in the prescribed manner for the following indicators:

The dropping point was determined according to GOST 6793 Petroleum products. The method of determining the dropping point, effective viscosity - according to GOST 7163-84 Petroleum products. The method for determining viscosity by an automatic capillary viscometer, the welding load is in accordance with GOST 9490-75 Liquid and plastic lubricants. Method for determining tribological characteristics on a four-ball machine.

The guaranteed operating temperature range was determined by three methods: tests on a CKF ROF + machine allow determining the upper limit of the operating temperatures of greases. Method DIN 51.805 Determination of the parameters of pressure flow for lubricants, method Kesternich. Method ASTM D 1478 Determination of Low Temperature Torque. The tensile strength was determined according to GOST 7143-73, method A. Plastic lubricants. Method for determination of tensile strength and heat strengthening.

The characteristics of the proposed lubricant, shown in table 2 show that the proposed lubricant with the stated ratio of the components has improved lubricating properties compared to the prototype, dropping point, tensile strength - minimum load, causing a transition from elastoplastic deformation to the flow of the lubricant and the upper limit of the guaranteed operating temperature range .

An increase in the content of lithium soap leads to an increase in viscosity (and, accordingly, a deterioration in pumpability), a decrease in the content of lithium soap leads to a decrease in the dropping point. In both cases, the lubricating properties deteriorate.

The proposed grease is characterized by high anti-wear, anti-corrosion and anti-seize performance, providing reliable protection of equipment even under high sliding loads and shock loads. Thanks to the use of a low-viscosity base oil with a high viscosity index and the presence of an additive package, the energy consumption of the equipment is reduced and also has a low cost.

Claims (2)

Multipurpose universal high-temperature grease, including mineral oil, a thickener and antioxidant, anti-seize, adhesive and anticorrosive additives, characterized in that it additionally contains HiTek 343, Anglamol-99 or Anglamol 33 as an antifriction additive, including phosphorus, sulfur and nitrogen, 1 2,3 Benzotriazole as a corrosion inhibitor and dye - a blue phthalocyanine pigment, while as a thickener - isobutylene polymer, as an anticorrosion and antiwear additive - di zinc alkyl dithiophosphate, as an anticorrosion additive - Acor-1 in the form of nitrated oil of type M-8 with 10-11% technical stearin, as an antioxidant additive of the phenolic type Agidol-1 (4-methyl-2,6-di-tert-butylphenol ), Naphtham-2 or Diphenylamine, and as a mineral oil it contains a mixture of three highly refined mineral base oils, consisting of a component of residual oils, a component of distillate III vacuum oils and a component of low-setting oils taken in a ratio of 3: 1: 2, in the following ratio of compone NTV, wt.%: complex lithium soap 12-hydroxystearic acid 18-26 1,2,3 Benzotriazole 0.3-0.8 Acor-1 0.4-0.8 isobutylene polymer 1.0-2.0 zinc dialkyldithiophosphate 0.3-0.7 HiTech 343, Anglamol-99 or Anglamol-33 -1.5-2.5 Agidol-1 (4-methyl-2,6-di-tert-butylphenol), Naphtham-2 or diphenylamine 0.3-1.0 blue phthalocyanine pigment 0.7-1.2 a mixture of mineral base oils rest