DE2923579A1 - Cold-setting lubricant pastes based on epoxy! resin - contg. molybdenum di:sulphide, graphite, aluminium, copper, aluminosilicate and poly-amine - Google Patents

Abstract

Lubricant paste compsns. comprise 40-80 pts.wt. epoxy resin, 15-30 pts.wt. MoS2, 10-15 pts.wt. graphite, 5-10 pts.wt. Al, 5-10 pts.wt. Cu, 8-15 pts.wt. aluminosilicate and 5-10 pts.wt. polyethylene polyamine. The compsns. can be used to lubricate large or small areas (e.g. in precision machine tools). They can be applied in thick (1-2 mm) layers and harden at room temp. to form films with good antifriction and antiwear properties and high mechanical strength.

Description

description

ANTIFRICTION PASTE The invention relates to mechanical engineering, In particular on anti-friction pastes, which are used to produce a lubricating film Friction surfaces of assemblies are used.

Antifriction pastes based on phenol-formaldehyde, Epoxy, butyraldehyde and other film images whose sliding properties are based on a filler such as molybdenum disulfide, titanium diselenide or a mixture of these (see for Example L.N. Sentjurichina, E.M. Oparina. "Solid Molybdenum Disulfide Lubricants", Publishing house "Chimija" ("Tverdye disolfidmolibdenoye smaskilt), Moscow, 1966, p.24-99) judge. These pastes are hardened in ovens at a temperature of 100 up to 2000C, which means that the above-mentioned anti-friction pastes are used for the lubrication of large friction units how 3 m and more long machine guides cannot be used. These pastes serve to produce a solid lubricating film only with small friction units.

Antifriction buttons for the production of the solid are also known Lubricating film on friction units, which are hardened at room temperature. So shows For example, one of the well-known anti-friction pastes with the following composition (in Parts by weight): epoxy resin 80 to 150 dibutyl phthalate 15 to 30 molybdenum disulfii 50 to 100 polyethylene polyamine 15 to 30 solvent for sposid resin, consisting from 50 parts by weight of toluene, 15 parts by weight of butanol, 10 parts by weight of ethanol, 10 parts by weight of butyl or amyl acetate, 8 parts by weight of ethylene glycol and 7 parts by weight Acetone 80 to 150 (see e.g. SU-PS 228 231) The known paste described has a liquid consistency and is on the friction surfaces of the parts in friction units to be applied with a brush or by atomization (for example with the aid of an atomizer). The thickness of the resulting solid lubricating film is in a range of 0.05 to 0.1 mm. The specified thickness restriction sets the work capacity R des solid lubricating film (i.e. the working capacity of friction units).

The sliding property values (coefficient of sliding friction f friction > Intensity of linear wear Ih and working capacity R) of the solid lubricating film, which the paste of the above-mentioned composition forms are sufficient in use the paste in friction units, for example in machine guides, especially in Case of precision machine tools, not fail. At a sliding speed V = 0.06 m / s and load P = 10 kp / cm2 the coefficient of sliding friction f friction is 0.5, the intensity of the linear wear 1h l, O.lO 7 and the work capacity R 8.5 km.

The purpose of the present invention is to address the disadvantages mentioned to avoid.

The invention is based on the object of such a composition of the anti-friction paste and such a relationship between the components of the paste to choose that the paste in both small and large rubbing units can be used and that the solid lubricating film based on the paste mentioned has high sliding property values.

This object is achieved in that an anti-friction paste the basis of spoxy resin, molybdenum disulfide and polyethylene polyamine, proposed is, the paste according to the invention also graphite, aluminum, copper and aluminosilicate with the following ratio between the components (in weight points) contains: Epoxy resin 40 to 80 molybdenum disulfide 15 to 30 Graphite 10 to 15 Aluminum 5 to 10 copper 5 to 10 aluminosilicate 8 to 15 polyethylene polyamine 5 to 10 If a solid lubricating film with extremely high hardness is required, a Anti-friction paste with a high filler content (molybdenum disulphide, graphite, Aluminum, copper, aluminosilicate) are preferred. In this case it is recommended to of the anti-friction paste, a solvent for epoxy resin in an amount of 5 to Add 30 parts by weight. The addition of the solvent secures the paste required consistency.

The anti-friction paste according to the invention is referred to as ÄDMA (#DMA), The presence of molybdenum disulfide and graphite in the paste according to the invention #DMA enables the significant reduction in the coefficient of sliding friction at sliding speed For example, V = 0.06 m / s and load P = 10 kp / cm2 is the coefficient of sliding friction 0.2.

Due to the presence of aluminosilicate, copper and aluminum in the Paste according to the invention is the mechanical strength and wear resistance of the solid lubricating film based on the paste mentioned is significantly increased and thus The intensity of the linear wear Ih of the specified lubricating film can be significant be reduced. At smooth speed speed V = 0.06 in / s and Load P = 10 kp / cm2 is, for example, the intensity of the linear wear 1.0.10 9.

The paste according to the invention has a thick consistency and leaves expediently 1 to 2 mm thick in a layer of any thickness Apply a layer to the friction surfaces of the parts of the friction units. It takes the working capacity R of the solid lubricating film based on the paste mentioned is significant to. At sliding speed V = 0.06 m / s and load P = 10 kp / cm2 reached on Example the work capacity 250 to 500 km (depending on the thickness of the fixed Lubricating film).

The anti-friction paste of the composition according to the invention is cured at room temperature; therefore you can use them both in small and in use large friction units.

The parts of the friction units can be made of metal, wood and Run plastics.

The antifriction paste according to the invention is prepared by mixing of the epoxy resin with a filler in the proportions given above. Some Minutes before applying the anti-friction paste to the friction surfaces of the parts of friction units, a cold curing agent, polyethylene polyamine, is added to the prepared mixture, with thorough mechanical stirring.

The prepared paste is applied to the friction surfaces with a spatula, for example of the parts of friction units.

The applied paste is at a temperature of 18 to 2200 set in the course of 1.5 to 2 hours. The resulting solid lubricating film wins maximum hardness at the specified temperature in the course of 36 to 48 hours after the Applying the paste. The hardening time of the anti-friction paste is reduced to 15 to 20 hours when curing is carried out at a temperature of 35 to 4000 will.

If the anti-friction paste has a high content of filler material it is recommended to use a solvent ur epoxy resin in the paste above add the specified amounts. Acetone, toluene, ethanol, butanol or a mixture consisting of 50 parts by weight of toluene, 15 parts by weight of butanol, 10 parts by weight of ethanol, 10 parts by weight of butyl or Use amyl acetate, 8 parts by weight ethylene glycol and 7 parts by weight acetone The coefficient of sliding friction given above X friction intensity of the linear wear Ih and the working capacity R of the solid lubricating film given above based on the Paste according to the invention are determined according to the following methodology, according to which A machine working with the face friction method is used.

According to this method, the anti-friction paste is applied to the face a cylindrical metal sleeve.

After hardening the paste at a temperature of 18-2200 and To polish the resulting solid lubricating film, the body (the Socket with the one on it Lubricating film) in alignment with the similar bushing without a lubricating film (counter body), then brings the test body in contact with the end face of the counter body under the action of a certain Load, after which the counter body is set in rotary motion. The frictional force F im Friction area of the contacting surfaces of the test body and the counter body is fixed with the help of a strain gauge and a registration device.

The coefficient of sliding friction fReibung is calculated according to the formula fReibung = @ / P determined, where F frictional force, kp P normal force, kp / cm2.

The intensity of the linear wear Ih is calculated according to the formula - = h. 10-9 L determines where h wear (reduction in thickness) of the solid lubricating film, measured by means of a micrometer L sliding friction value in km, on which the wear h was created.

The sliding friction path L results from the formula L = V..t, v rin V sliding speed of the opposing body, in / s t sliding time, s.

The work capacity R of the solid lubricating film is determined according to the following formula; R = # / Ih, where # initial thickness of the solid lubricating film, mm, is To better understand the present invention, the following examples are given cited for its concrete execution. In all examples one determines the Sliding coefficient of friction 'the intensity of the linear wear Ih and that Working capacity R of the solid lubricating film according to the methodology described above.

Example 1.

Prepare the anti-friction paste of the following composition (in (: r'ewichtsteiien) to: epoxy resin 60 molybdenum disulfide 24 graphite 12 aluminum 8 Copper 5 aluminosilicate 10 polyethylene polyamine acetone 15 This is used as an epoxy resin mixed with acetone. A filler is added to the solution obtained: molybdenum disulphide, Graphite, aluminum, copper and aluminosilicate with thorough mechanical stirring while 5 to 10 me £ a. 8 to 10 min before applying the paste on the friction surfaces of the metal dowels of the friction unit the prepared Mixture of a clay hardener, polyethylene polyamine, with thorough mechanical stirring added.

The anti-friction paste is applied to the friction surfaces of the parts with a spatula a heating unit in a 2 mm thick layer. The applied paste is set after 2 hours at a temperature between 18 and 200G. Of the resulting solid lubricant gains hardness during 48 hours after application said paste on the friction surfaces of the parts of the friction unit. The hardening time of the anti-friction paste is reduced to 15 h if the aforementioned hardening occurs a temperature of 35 to 400C is carried out.

The sliding property values of the solid lubricating film based on the Paste of the specified composition, obtained when trying a rubbing unit, which works with a sliding speed 7 of 0.06 m / s at 2 kp / cm2 load P, are as follows: coefficient of sliding friction 0.25 intensity of linear wear 1h 1.0.10 Work capacity R, km 525 Example 2.

An anti-friction paste of the following composition is used analogously to Example 1 (in parts by weight) prepared: epoxy resin 40 molybdenum disulfide 15 graphite 10 aluminum 5 copper aluminosilicate 8 polyethylene polyamine 5 solvent for diana epoxy resin, consisting of 50 parts by weight of toluene, 15 parts by weight of butanol, 10 parts by weight Ethanol, 10 parts by weight of butyl acetate, 8 parts by weight of ethylene glycol and 7 parts by weight Acetone 30 The subsequent operations of applying the paste to the friction surfaces the parts of a friction unit and the hardening of the paste are analogous to example 1 carried out.

The sliding property values of the solid lubricating film based on the Paste of the composition mentioned, obtained when trying a rubbing unit that works with a sliding speed V of 0.06 m / s at 2 kp / cm2 load P, are as follows: Gleitre4bungsza Friction 0.28 Intensity of linear wear Ih 2.2.10-9 work capacity R, km 300 Example 3.

Analogously to example 1, an anti-frictional paste is made with the following composition (in parts by weight) prepared.

Epoxy resin 45 Molybdenum disulfide 20 graphite 10 aluminum 6 copper 5 aluminosilicate 9 polyethylene polyamine 6 toluene 5 the subsequent operations of applying the paste to the friction surfaces of the parts of a friction unit and the The paste is hardened in the same way as in Example 1.

The sliding property values of the solid lubricating film based on the Paste of the specified composition are similar to those in Example 1.

Example 4.

Prepare an anti-friction paste of the following composition (in Parts by weight) to: epoxy resin 80 molybdenum disulfide 30 graphite 15 aluminum 10 copper 10 Alumosilicate 15 Polyäthylenpolyamin 10 This is the epoxy resin with a filler (Molybdenum disulfide, graphite, aluminum, copper and aluminosilicate) in the mixed ratios given above. The subsequent operations ger preparation the anti-friction paste, which is applied to the friction surfaces of the parts of a friction unit and the hardening of the paste are carried out analogously to Example 1.

The sliding properties of the solid lubricating film based on the Paste of the specified composition are similar to those in Example 2.

In the following, the comparative data are touched upon, which the slip properties characterize the solid lubricating film on the basis of the known anti-friction pastes. These sliding property values were obtained when a friction unit was tested, which works under the conditions described in Example 1.

The sliding property values of the solid lubricating film based on the known anti-friction paste according to SU-PS 228 231 c-ind as follows: coefficient of sliding friction Friction 0.7 Intensity of linear wear Ih 0.9.10-8 work capacity k, km 111 The sliding property values of the solid lubricating film based on the known Antifriction paste "Möglice" (company "Diamant", BP) are as follows: coefficient of sliding friction Friction 0.47 Intensity of linear wear Ih 2.3.10 8 Work capacity R, km 40

Claims (2)

ANT IFRIKT I ON PASTE Patent claims 1. Containing anti-friction paste Epoxy resin, molybdenum disulfide and polyethylene polyamine, d a d u r c h g e -k e n n n notices that they also have graphite, aluminum, copper and aluminosilicate contains, the ratio between the ingredients (in parts by weight) as follows: epoxy resin 40 to 80 molybdenum disulphide 15 to 30 graphite 10 to 15 aluminum 5 to 10 copper 5 to 10 aluminosilicate 8 to 15 polyethylene polyamine 5 to 10. 2. Antifriction paste according to claim 1, d a d u r c h g e k e n n z e i n e t that they also add a solvent to the epoxy resin in an amount contains from 5 to 30 parts by weight.