SU1061442A1 - Polymeric compound of friction purpose - Google Patents

Abstract

POLYMER FRICTION KOMPOZI1TS1R PURPOSE soderzhatda synthetic diene rubber, curatives, asbestos, graphite amorfnyy-, alumina, technological additive otlichayup1a in that, in order to reduce linear wear, it further comprises titanium porotok in combination with magnesium oxide or titanium dioxide with The following ratio of components, wt.%: Synthetic 15-25 diene rubber Vulcanizing 3-5 group 35-50 Asbestos 2-20 Graphite amorphous Alumina Titanium poro1-10 shock Magnesium oxide or S 1-10 titanium dioxide (L C Technological Else additive

Description

. The invention relates to industrial asbestos technical products, in particular, to polymer compositions intended for operation in coupling couplings of automobiles and other vehicles.

The polymer composition based on a combination of resins with rubbers, containing asbestos and other targeted additives, which include finely divided titanium, as well as friction material with titanium dioxide, is known.

However, these compositions do not have high mechanical strength.

Closest to the present invention is a composition of friction purpose, comprising, in wt.%:

Synthetic

dien rubber

9

(sodium butadiene) 17

Vulcanizing

Group:

sulfur3.55

2-mercaptobenzthiazole 0,4 tetramethylthiuram disulfide 0, 1

barite concentrate

(filler) 29.1 alumina4.0

amorphous graphite2

Polydienes (technological additive) 1 Asbestos 42.8 Polyethylsiloxane liquid 0.05 Friction clutch linings made from a known polymer composition do not satisfy consumers due to low mechanical strength, heat resistance and high linear wear.

The aim of the invention is to increase the mechanical strength, heat resistance and reduce linear wear.

This goal is achieved by the fact that the polymer composition of friction purpose, containing synthetic diene rubber, vulcanizing group, asbestos, graphite amorphous alumina, technological additive, additionally contains titanium powder in combination with magnesium oxide or titanium dioxide, in the following ratio of components, wt,%: Kauchuk15-25

Vulcanizing

group 3-5

Asbestos, 35-50 Amorphous Graphite2- .0 Alumina2- 15 Titanium Powder1-10 Magnesium Oxide or Dioxide

titanium1-10

Technological

additiveEverything else

The introduction of magnesia increases the mechanical strength and heat resistance of the material, and titanium dioxide reduces the distortion of the pressure metal discs.

Sodium-butadiene, cis-polybutadiene, polybutadiene with a high content of units (1-2J rubbers, styrene butadiene, styrene butadiene methyl rubbers, and their combinations are used as a binder.

For example, the polymer composition is prepared in mixers in the usual way without the use of a solvent.

The resulting mass is crushed, and then pressed under pressure, first at room temperature and then at high. The formulations of the compositions are given in table .1 (with magnesium oxide) and in table 2 (with titanium dioxide).

The wear properties of the polt-1er composition are estimated from the total wear of the two linings obtained by testing them in a real clutch assembly of a GAZ-53 car on the SIKS2 test bench using the CT-OOUS test procedure. Test conditions: Number of cycles 500 Coupling frequency 80 sec. Initial speed 2250 rev / mi

(37.5 rps

Moment of inertia 9.1 kg-m The clutch pads are subjected to testing - detail 53-1601138 (outer 300, inner 165, height 4 mm)

The mechanical strength of the clutch linings is estimated by the strength of the linings for an equal (rotational speed, which the liners hold up to destruction under the action of the centrifugal forces of the olrdehyde at a temperature of 20 s on the ICAR-1 test bench according to the CT-OOI3 method. The thermal stability of the linings is also evaluated by the strength of the overlays for the separation, but determined at three fixed temperatures of 50, .150 and 250С at the ICAR-1 stand according to the method ST-OOP C.

The distortion of the pressure discs is estimated by measuring the pressure discs with a probe on the glass after 500 inclusions according to the ST-0010 method,

Tests on the ICAR test bench, according to the ST-0013 C method, show that the adhesion pads of the proposed polymer composition exceed the mechanical strength of the pads of the known composition by an average of 700 rpm (at a temperature of 50 ° C by 900 rpm) at a temperature of I50 ° C 600 rpm, and at a temperature of 700 rpm, i)

Tests on the stand SIKS-2. The real clutch of the GAZ-53 shows that the linings of the proposed polymer composition have a linear wear an average of 2.2 times less than the wear of the linings of a known composition. Warping of the pressure discs is reduced by 4-5 times.

51061442 6 / Examples. recipes of well-known compositions of the proposed

 T a R and c a 1

Sodium butadiene rubber Cis polybutadiene rubber

Polybutadiene rubber. out

18.5 2, 5A A, 5

Oh, and

0.10.1O, 0.2 O, 1

Mechanical strength and heat resistance of adhesion pads of known, control and proposed compositions

Continuation of table 2

0.1

0.1

Table 3 Known properties of known, control and Linear iz nos, mm0,310.29 0.27 0.28 0.28 0.13

Test results Linear from 0, 090.12 0.13 nose, mm Distortion of pressure 0.020.04 0.05 disc, mm

Table 5 Table 4 offers a variety of options. 0.15 0.15 0, U 0.13 0.14 0, U 0.10.120.110.12 0.03 0.040.040.05

Claims (1)

<claim-text> POLYMERIC COMPOSITION OF FRICTIONAL PURPOSE, containing synthetic diene rubber, vulcanizing group, asbestos, amorphous graphite ·, alumina, technological additive, different </ claim-text> <claim-text> 2 </ claim-text> <claim-text> in order to reduce linear wear, it additionally contains titanium powder in combination with magnesium oxide or titanium dioxide in the following ratio of components - </ claim-text> <table border = "1"> <tr> <td colspan = "2"> com, wt.%: </ td> </ tr> <tr> <td> Synthetic diene rubber </ td> <td> I 5-25 </ td> </ tr> <tr> <td> Vulcanizing </ td> <td> </ td> </ tr> <tr> <td> group </ td> <td> 3-5 </ td> </ tr> <tr> <td> Asbestos </ td> <td> 35-50 </ td> </ tr> <tr> <td> Amorphous graphite </ td> <td> 2-20 </ td> </ tr> <tr> <td> Alumina </ td> <td> 2-15 </ td> </ tr> <tr> <td> Titanium Poro - </ td> <td> </ td> </ tr> <tr> <td> shock </ td> <td> 1-10 </ td> </ tr> <tr> <td> Magnesium oxide or </ td> <td> </ td> </ tr> <tr> <td> titanium dioxide </ td> <td> 1-10 </ td> </ tr> <tr> <td> Technological </ td> <td> </ td> </ tr> <tr> <td> additive </ td> <td> Ostal </ td> </ tr> </ table> <claim-text> Zi. ,,,, Y6I42 </ claim-text> <table border = "1"> <tr> <td> <claim-text>. </ claim-text>