Lubricant for coating metal surfaces

 

(57) Abstract:

The inventive lubricant contains, by weight. percent : molybdenum disulfide 40 - 70; polyvinyl chloride or cellulose acetate 0.5 to 2.5 and three-3,5-xylinechart else. table 2.

The invention relates to lubricants, in particular for lubricants for coating metal surfaces.

Currently in the USSR and abroad there is a fairly wide range of lubricants with anti-friction properties due to the use of lubricating oils Mondialogo and synthetic origin and incorporating solid fillers, in particular molybdenum disulfide. As the dispersion medium in these lubricants are petroleum oils, synthetic fluids, or a mixture thereof. Having a high anti-friction properties, these greases have very limited resource of time, usually expressed by hundreds of hours. Prolonged exposure to high temperature, oxygen, water vapor causes the resinification of petroleum oils and greases based on synthetic fluids in the absence of thickeners lose their kolodney stability. While the solid phase particles are deposited, synthetic fluid, flowing down from powernoise the operating conditions of the associated components and does not preclude corrosion.

Known grease containing molybdenum disulphide and methylsiloxane liquid as the dispersion medium.

The disadvantage of this lubricant is that it is operable at temperatures up to 300aboutAnd prolonged use of it leads to increased friction and reduced several times the service life of the friction pairs. In addition, this grease has a tendency to stratification.

The closest in technical essence to the invention is a lubricant for coating nodes surfaces containing molybdenum disulfide and three-3,5-seleniumtest. The lubricant contains the Mac. % :

Three-3,5-Xylenol - phosphate 10 - 50

The disulphide of molybdenum 50 - 90.

A disadvantage of the known lubricant is a shorter lifetime due to the low stability due to stratification.

The aim of the invention is to increase lubricant life by improving colloidal stability.

To achieve this goal grease including molybdenum disulfide and three-3,5-celenistica, further comprises polyvinyl chloride or cellulose acetate in the following ratio, wt. % :

The disulphide of molybdenum 40 - 70

Polyvinyl chloride or acetylchol - lulose 0.5 to the three-3,5-celenistica polymeric thickener - Prineville (PVC) or cellulose acetate ("A") at the specified mixing ratio. In keeping PVC or "A" in the specified mass ratio prevents separation lubrication and leakage of oil, included in its composition, operation and increase the service life of the lubricant, which allows to conclude that the materiality of the alleged differences.

For the preparation of lubricants used:

Disalcid molybdenum TU 48-19-133-85

Three-3,5-xylinechart THE 34.70.11335-88

PVC GOST 14332-78

"A" GOST 20282-84

Grease was prepared as follows.

Three-3,5-xylinechart when heated was added PVC or "And" and stirred the mixture until complete dissolution of the polymer. Then introduced into the resulting mixture of molybdenum disulfide and the mixture was cooled. By the described method were obtained the following sample lubricants (see table. 1).

We received samples of the residue were determined colloidal stability according to GOST 7142-74 at room temperature, 50 and 120aboutAnd the coefficient of friction at room temperature 120aboutC.

Colloidal stability was determined by the number of pressed oil wt. % . The results of the test lubricants are shown in table. 2.

Thus, proves. (56) Sinitsyn centuries grease in the USSR, M. : Chemistry, 1984, S. 15.

USSR author's certificate N 883162, class C 10 M 137/04, 1981.

LUBRICANT FOR COATING METAL SURFACES, containing molybdenum disulphide and three-3,5-xylinechart, characterized in that it further comprises polyvinyl chloride or cellulose acetate in the following ratio, wt. % :

Molybdenum disulfide 40 - 70

Polyvinyl chloride or cellulose acetate 0,5 - 2,5

Three-3,5-xylinechart Else

 

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