RU2581463C1 - Grease - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to grease which contains calcium sulphonate, acetic acid, calcium oxide, residual petroleum oil with viscosity of 17-44 cSt at 100°C, with the following ratio of components, wt %: calcium sulphonate 59.2-69.9, acetic acid 7.0-12.2, calcium oxide 1.2-5.3, distilled water 2.0-4.8, residual petroleum oil with viscosity of 17-44 cSt at 100°C - the balance up to 100.

EFFECT: producing grease capable of operating high temperature, having low susceptibility to oil separation during storage, improved anti-wear and extreme pressure properties.

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Description

The invention relates to a composition of greases intended for heavily loaded friction units operating at high temperatures, in humid and aggressive environments, and can be used in the oil and gas, metallurgical, automotive industries.

Known high-temperature grease "TsIATIM-221" (RU 2339683, GOST 9433-80) containing polyorganosiloxane fluid 132-25, thickened with calcium soap stearic acid with the addition of ceresin-80 and an additive package.

The disadvantages of this lubricant are the low extreme temperature of use (up to 150 ° C), hygroscopicity and poor anti-wear properties.

Known multi-purpose grease Litol-24 (RU 2202601, 2003, GOST 21150-87). The composition of Litol-24 grease includes a thickener - lithium soap of 12-hydroxystearic acid - 13%, antioxidant additive diphenylamine - 0.5% or neozone-D - 0.7%, viscosity additive polyisobutylene P-20 (M. m. 15000 25000 ) - 4%, dispersion medium - a mixture of spindle oil AU and industrial I-50A (1: 3) or residual or distillate oils of West Siberian oils - up to 100.

The disadvantages of this lubricant are the low limit temperature of use (up to 130 ° C), as well as low anti-wear and extreme pressure properties at high specific loads.

Known grease containing suprabasic calcium sulfonate, dodecylbenzenesulfonic acid, petroleum oil, 12-hydroxy stearic acid, methanol, acetic acid, hydrated lime, boric acid, water (US 5308514, 1994).

The disadvantages of this lubricant are the complexity of the component composition, the use of compounds harmful and dangerous to humans.

Closest to the invention is a plastic lubricant “Uniol-1” (RU 2177982, 2001, TU 38-20181-70), which includes MC-20 oil in an amount of 80 ± 2%, synthetic fatty acids (FFA) 11 ± 1 %, synthetic acetic acid in an amount of 4 ± 1%, lime 4 ± 0.5% and diphenylamine 0.4-0.5%.

The disadvantages of the lubrication are the low limit temperature of use (up to 150 ° C), low anti-wear and extreme pressure properties, as well as low colloidal stability, a tendency to heat hardening.

Thus, the known lubricant is not effective enough.

The objective of the invention is to provide a grease with high efficiency.

The problem is achieved by the described lubricant containing calcium sulfonate, acetic acid, calcium oxide, residual oil with a viscosity of 17-44 cSt at 100 ° C in the following ratio of components, mass. %:

calcium sulfonate 59.2-69.9 acetic acid 7.0-12.2 calcium oxide 1.2-5.3 distilled water 2.0-4.8 residual oil with a viscosity of 17-44 cSt at 100 ° C                                 the rest is up to 100

The technical result achieved is the creation of a grease with a high limiting temperature of use, a reduced tendency to release oil during storage, and improved antiwear and extreme pressure properties.

The described lubricant is prepared as follows.

To obtain lubricant use:

- calcium sulfonate, in particular, according to TU 38.1011283-2004 - additive KND-150;

- glacial acetic acid or aqueous solution GOST 19814-74;

- calcium oxide GOST 8677-76;

- residual oil with a viscosity of 17-44 cSt at 100 ° C. It is possible to use various residual petroleum oils with a viscosity of 17-44 cSt at 100 ° C, for example, residual petroleum oil for rolling mills according to TU 38.101312-2001, base residual oil of selective cleaning according to TU 38.101760-82 rev. 1-6, OKP 0253961700.

The described lubricant is prepared by thickening the residual oil (dispersion medium) with calcium sulfonate and acetic acid at a temperature of 80 ° C-90 ° C for 3-4 hours. Then, calcium oxide diluted in water is added, after which water is evaporated at a temperature of 130 ° C-145 ° C. Then the resulting product is cooled to room temperature.

The following is an example illustrating, but not limiting, the described invention.

Example

According to the above technology, 5 samples of grease of various compositions are prepared (Table 1). At the same time, residual petroleum oil is used for rolling mills according to TU 38.101312-2001 manufactured by Gazpromneft-Omsk LLC.

Physico-chemical, lubricating and corrosion-protective properties of the prepared lubricant samples in comparison with the Uniol-1 lubricant are shown in Table 2.

As follows from the above data, the described lubricant (samples 1-5), in comparison with the known Uniol-1 lubricant, has a higher dropping point and, as a result, a higher limiting temperature of use, improved anti-wear and extreme pressure properties (reduction in the diameter of the wear spot and an increase in the critical load and the load of welding), a reduced tendency of the lubricant to release oil during storage (decrease in the value of colloidal stability). The use of components in the described lubricant in amounts that go beyond the above amounts does not lead to the desired results.

Claims (1)

Grease containing calcium sulfonate, acetic acid, calcium oxide, residual oil with a viscosity of 17-44 cSt at 100 ° C in the following ratio, wt%:
calcium sulfonate 59.2-69.9 acetic acid 7.0-12.2 calcium oxide 1.2-5.3 distilled water 2.0-4.8 residual oil with viscosity 17-44 cSt at 100 ° C the rest is up to 100