SU1031964A1 - Sele-lubricating composition - Google Patents

Abstract

A SUSMAILING COMPOSITION WITH OD --- T -: f: tf with the aim of improving and resisting and reducing gaos | frnica € stew on the other contains natural G1 afit, talc and furfurolacetone polymer in the following ratio, wt.% 1 Coke coal 15-30% of natural pitch Natural gra4-12 fit Talc 2-6 Polymer Z-furanCarbino C 5-10 FurFuroladeto1-3 new nomsMep E-Oxntricarval0, 4-0,8 lilova acid § Arts Wen graphite Else JV s

Description

About: l

: about a

The invention relates to chemical engineering in parts, to obtaining self-applied compositions used in the friction units of machines and units, where increased wear resistance and low permeability with respect to liquids and gases are required.

Izvesten antifriction carbon press material | Jl3, having satisfactory performance characteristics, including, wt.% ;. Fine Artificial Graphite

Coal tar pitch

Boron nitride. Polymer 2-furancarbinol Oleic acid

B-Oxytricarballyleic acid

Such material HMeet is not high enough gas tightness and

density..:.

The closest k to the proposed is a self-lubricated-La-S composition containing artificial graphite, coal tar pitch, 2-furancarbinol polymer and) -oxy tricarballic acid,

Such a self-lubricating c.-i composition has a sufficiently high density and gas impermeability, but its wear resistance is relatively low. .

The purpose of the invention is to increase the wear resistance and, gaeoyeprokipyaemost composition ,.

This goal is achieved by the fact that the known self-lubricating composition containing artificial graphite, KQKC coal tar pitch, 2-furancarbinol polymer and f-oxitriccarballic acid, also contains natural: adenite graphite, talc and furfurol-acetone polymer in the following ratio of components, wt. :

15-30

4-12 2-6

5-10

1-3

0.4-0.8 the rest.

In order to obtain the proposed composition, natural graphite (GSECT 7478-75) is mixed with talc (GOST 21234-75) for 15 minutes at room temperature. The mixture obtained is added to artificial graphite (TU 48-20-51-74) and coal tar (GOST 1038-75). UtaXTy mixed for 40 minutes, etc. The resulting mixture is cooled to room temperature, milled to a particle size of 120 μm and pressed at a specific pressure of 2000 kgf / cm. The blanks are burned in carbon bedding for 120 hours. At the same time, coking of coal tar pitch takes place. The material obtained after firing is loaded into an autoclave, maintained at a residual pressure of 10 mm Hg for 1 h, then impregnated at a pressure of 10 atm for 2 h with a mixture of 2-fur.ancarbinol (OST 59127-73), furfurol acetone oligomer (TU 6-05-211-822-78) and p-hydroxycarbonallylic acid (GOST 3652-69).

The composition impregnated with this composition is treated at a temperature rise rate of 5, whereby polycondensation of 2-furancarbinol and furfurol-acetone oligomer polycondensation occurs with the formation of corresponding polymers.

Example 1. Natural graphite (3.5% by weight) is mixed with talc (2.0% by weight) for 15 minutes at room temperature. The mixture obtained is added to artificial graphite (67.0 wt.%) And coal tar pitch (27.5 wt. |) And mixed for 40 minutes at. The resulting mixture is cooled to room temperature, ground to a particle size of 120 µm and pressed at a specific pressure of 2000 kgf / s. The billets are fired in carbon bedding at 1000 C for 120 hours. Coking of coal tar pitch takes place.

The material obtained after firing is loaded into an autoclave, vacuumized at a residual pressure of 10 mm Hg for 1 hour. Then, it is impregnated at a pressure of 10 amperes for 2 hours with a mixture consisting of 84.5% by weight of 2-furancarbiol, 12.0% by weight of furfurol-acetone oligomer and 3.5% by weight (V-hydroxycarbonallylic acid. The impregnated material is treated with with an average rate of temperature rise. In this case, polycondensation of 2-furancarbinol and furfural acetone of the oligomer occurs with the formation of the corresponding polymers. The material consists of, in wt.%: Coal coke coke 15.0 Natural graphite Talc 2-furancarbinol polymer Polymer furfurol acetone oligomer p-Oxytricarballic acid Artificial graphite Example 2. Natural gr fit (7,, may.%) is mixed with talc (3.5 wt.%) for 15 minutes at room temperature. The resulting mixture is added to artificial graphite (48 , 5 wt.%) And coal tar pitch (41.0 wt.%) And mixed for 40 min at 220 s. The mixture obtained is cooled to room temperature, crushed to a particle size of 120 μm and pressed at a specific pressure of 2000 kgf / cm The billets are burned in a carbonaceous bed at 10 ° C for 120. At this time, coking of the pitch takes place at the coke. Obtained after burning: the material is loaded into an auto vacuum unit with a residual pressure of 10 m Hg, st. within 1h At that, it is impregnated at a pressure of 10 atm for 2 hours with a mixture of 2 82% by weight of 2-furancarbinol, 15.0% by weight of furfurol-acetone olitomer, 3.0% by weight of [L-oxitri carballyleic acid for 2 hours. The impregnated material is processed at an average rate of temperature rise. When this happens polycondene. qi of 2-furancarbinol and fu-furolacetone oligomer .. The material consists of, May,%: Kok8 coal tar pitch. 23.0 Natural graphite8, 0 Talc4.0 Polymer 2-furancarbinol8, 0 polymer of furfurolacetone oligomer2, 0 Oxy tricarbyl lilic acid 0.6 Artificial graphite 54.4 EXAMPLE 3 Natural graphite (10.4 wt. %) mixed with talc (5.2 wt.%) for 15 kshn at room temperature. The mixture obtained is added to artificial graphite (32.8 wt.%) And coal tar pitch (51.6 wt.%) And mixed for 40 minutes at. The resulting mixture is cooled to room temperature, milled to a particle size of 120 μm and pressed at a specific pressure of 2000 kgf / cm. The billets are fired in carbon bedding at 1000 ° C for 120 hours. At the same time, Ks1-coal pitch is coked. The material obtained after firing is loaded into an autoclave, vacuumized at a residual pressure of 10 mm Hg. for 1 h. Then, it is impregnated with a pressure of H 2 O for 2 h with a mixture consisting of 80.0% by weight of 2-furancarbinol,; 17.0% by weight of furfurolacone oligomer, 3, O May.% P-oxytricarbal lilic acid and o6pa6atiiimaK) T at 300c with an average rate of temperature rise 5-7 S / h. The material consists of ee, wt.%: Coke coal tar 30,0 Natural graphite. , $ 2.0 Talc. 6.0 Polymer 2-furan-. Carbinol O Polymer of Furfurol Acetone Oligomer 3 0 L-Oxytricarballic Acid O, .8 Artificial Graphite 38.2 Comparative properties of the proposed and initial self-emulsifying compositions can be found in this type of material. Thus, the application of the proposed composition allows to reduce the speed of it. , 5 piaaa, coefficient n1 of fdsonability, 3-5 times, and friction at elevated temperatures by 1.5 times. Properties

. Compressive strength, kgf / cm

Gas permeability coefficient cm / s

Wear rate at

mm / h

Friction coefficient at

Khozedeit friction

at

2020

1860

-6

.-

(3-5) 10

ten

3.5

3.0 2.4

0.12

0.11 0.10 0.13

0.15 Suggested as an example Known IZZI

Claims (2)

A SELF-LUBRICATING COMPOSITION containing artificial grape (fit, coke pitch, polymer of 2-furancarbinol and β-hydroxy <tricarballylic acid, so that in order to increase wear resistance and reduce gas permeability, it additionally contains natural graphite, talc and furfural-acetone polymer in the following ratio of components, wt.%: t Coal pitch coke Natural graphite Talc Polymer of 2-furancarbinol FurFurolacetone polymer | 5-OK citricarballylic acid Artificial graphite 15-30 4-12 2-6 5-10 1-3 0.4-0.8 Rest 8 cells>