RU2381260C1 - Viscous lubrication - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: usage for friction assemblies of machines and mechanisms. Lubrication contains in wt %: copper complex 0.2-8, lithol-24 up to 100. Complex corresponds to 2,4,6,8-tetrakis(tert-butyl)-9- hydroxyphenoxazine copper complex (II) of formula:

.

EFFECT: increasing of wear-preventive properties.

1 tbl

Description

The invention relates to lubricants and can be used to lubricate the friction units of industrial equipment, vehicles and household appliances.

Known grease Litol-24 (GOST 21150-87) based on mineral oils thickened with lithium soap 12-hydroxystearic acid, and containing a package of functional additives. The grease has good rheological, conservation and other operational characteristics, however, its anti-wear properties are not high enough, especially during the running-in period of the bearings.

The technical result of the invention is to increase the anti-wear characteristics of grease at moderate and high loads, which leads to an increase in the service life of friction units of machines and mechanisms.

The technical result is achieved by the fact that Litol-24 lubricant additionally contains 2,4,6,8-tetrakis (tert-butyl) -9-hydroxyphenoxazinyl complex of copper (II) of the formula:

The ratio of components in the lubricant is the following, wt.%:

2,4,6,8-tetrakis (tert.butyl) -9-hydroxyphenoxazinyl complex of copper (II) 0.2-8 Litol-24 up to 100

The preparation and properties of the 2,4,6,8-tetrakis (tert-butyl) -9-hydroxyphenoxazinyl complex of copper (II) are described in [V.G. Zaletov, A.I. Shif, E.P. Ivakhnenko, A.I. .Prokofiev. Spatially shielded chelate complexes of copper (II) with phenoxazinyl ligands: EPR study, Izv. AN, Chemical Series, 1995, No. 3, pp. 894-899]. The complex is not known as an additive in lubricating compositions.

According to the test results, 2,4,6,8-tetrakis (tert-butyl) -9-hydroxyphenoxazinyl complex of copper (II) improves the antiwear properties of the lubricant.

To obtain the inventive lubricant, a powdered 2,4,6,8-tetrakis (tert-butyl) -9-hydroxyphenoxazinyl complex of copper (II) is added to Litol-24 grease with stirring.

Anti-wear properties were determined on a four-ball friction machine according to GOST 9490-75.

The dropping point was determined according to GOST 6793-53.

The test results are shown in the table.

Table Sample No. The amount of Litol-24,% wt. The amount of additive,% wt. The diameter of the wear spot, mm at load, kG Drop point, ° С twenty thirty 40 fifty 60 one one hundred - 0.8 0.86 0.90 1.10 1.20 190 2 99.9 0.1 0.72 0.80 0.85 1.00 1.10 190 3 99.8 0.2 0.53 0.65 0.68 0.8 0.90 192 four 99.5 0.5 0.42 0.60 0.70 0.75 0.85 193 5 99.0 1,0 0.35 0.55 0.65 0.70 0.82 192 6 98.0 2.0 0.32 0.35 0.55 0.60 0.68 190 7 96.0 4.0 0.45 0.42 0.57 0.68 0.77 188 8 94.0 6.0 0.52 0.55 0.60 0.72 0.85 185 9 92.0 8.0 0.55 0.60 0.70 0.80 0.90 175 10 90.0 10.0 0.70 0.75 0.85 0.95 1.10 160

As can be seen from the above data, the diameter of the wear spot of the claimed composition is reduced by 1.25 ÷ 2.5 times.

Claims (1)

Grease based on Litol-24 and additives, characterized in that the additives used are 2,4,6,8-tetrakis (tert.butyl) -9-hydroxyphenoxazinyl complex of copper (II) of the formula:

in the following ratio of components, wt.%:
copper complex 0.2-8 Litol-24 up to 100