The rubber mixture

 

The invention relates to rubber industry and can be used in aggressive environments, in particular in the communication system for the manufacture of bushings for the suspension of the self-supporting fiber optic cables. The rubber mixture comprises, by weight.h: synthetic rubber, SKEPT 100; stearic acid technical - 1; zinc white - 5; active carbon technical type ISAF - 50; organic peroxide is 2,5-6,0; stabilizer modifier is 1.0 to 2.5. The technical result consists in increasing the health outdoors with temperate and cold climate in the range from -60°C to +55°C for a longer period of operation while maintaining the basic performance properties. 6 C.p. f-crystals, 1 Il., 1 PL.

The invention relates to the rubber industry, in particular to the development of the formulation of the rubber mixtures based on synthetic rubber, which can be used in constructions and devices in which the working conditions of the rubber shall be carried out either in a hostile environment, or when severe adverse external effects of the environment. For example, in communication systems for the manufacture of liners for pendants splatterhouse when exposed to atmospheric air, steam and hot water, are widely used rubber mixtures based on ethylene-propylene rubber, such as rubber compound (RF patent 2036941 from 19.07.1989, publ. 09.06.1995) in the following ratio, wt.h.:

Qualified electronic signature certificate-40 100

Sulfur 0,3-0,4

Zinc oxide 3-6

Magnesium oxide 7-15

Proximo F-40 5-7

Carbon black P-803 60-90

Oligomeric condensation product

melamine with odnoklasniki grey 0,8-1,5

However, the characteristics of the rubber compound does not remain stable during long-term external exposure to weather conditions.

Closest to the technical essence is a rubber mixture based on ethylene-propylene rubber stamps 51-1481 (see THE 005216-75) having the following composition, wt.h.:

Qualified electronic signature certificate grade 40 and 50 100,00

Sulfur 0,30

Proximo F-40 6,25

Zinc white 5,00

Magnesium oxide burned 10,00

Carbon black P-803 80,00

As carbon black taken active carbon, namely furnace soot marks P-803, with specific geometric surface 803 μm and an oxygen content, %: 0,2-0,7 Specified rubber mixture has insufficient resistance to thermal-oxidative aging on the air for the manufacture of products, for a long time when exposed to air and high temperatures. Kralikova mixture, for example the CLAIM-1098, used for the manufacture of liners for the suspension of the self-supporting fiber optic cables must be working outdoors in areas with temperate and cold climate in the temperature range from -60°C to +55°C for long term operation. Technical properties of the rubber compound must ensure its work in the open air, when the mixture is exposed to external factors, such as humidity, solar radiation, ozone radiation. Properties of rubbers on the basis of each specific rubber can be improved prescription tricks only to a certain extent, because the ingredients of the rubber compound only contributes to a more complete realization of the properties of rubber, i.e., in the preparation of the recipe chosen primarily those ingredients, which are more sensitive to the technical properties of the rubber compound.

To achieve the objectives of the proposed rubber mixture, for example, which contains synthetic rubber, zinc white, carbon black, and differs from all the previously known fact that the mixture contains as synthetic rubber ethylenepropylene rubber (Sept), as carbon technical - active the technical (stearin), organic peroxide, stabilizer modifier in the following ratio, wt.h.:

Ethylenepropylene rubber, Sept 100,00

Stearic acid technical (stearin)

(GOST 6484-64) 1,00 (within

technological tolerances)

Zinc white (GOST 202-84) 5,00 (within

technological tolerances)

Active carbon technical type ISAF 50,00 (within

technological tolerances)

Organic peroxide 2,5 (within

technological tolerances)

The stabilizer modifier of 1.00 (within

technological tolerances)

As the ethylene-propylene-diene rubber, SKEPT, THE 38.103252-92 can be used, for example, ethylenepropylene rubber, Sept 30 or Sept 40, or Sept 50, or SKEPT 60, with the content of propylene units 31-35 mol.%, ash 0,14-0,20%. As carbon technical use active carbon technical, which is the speed Sagami, for example, furnace, obtained on the liquid raw material, the specific geometric surface 100 microns with an average particle diameter in microns: 25-32 and content, %: hydrogen 0,20-0,5; oxygen - 0,7-1,5.

As carbon technical can be taken, for example, active carbon technical type ISAF, mark on classific and USA-ISAF, No. 220, according to the classification of the USSR - PM-100.

As the organic peroxide can be used, for example, Proximo F-40 in the following ratio, wt.h.:

Ethylenepropylene rubber, Sept 100,00

Stearic acid technical (stearin) 1,00

Zinc white 5,00

Active carbon technical type ISAF 50,00

Proximo F-40 6,00

The stabilizer modifier 2,5

Proximo F-40 can be replaced, for example, peroxide has been studied in the following ratio, wt.h.:

Ethylenepropylene rubber, Sept 100,00

Stearic acid technical (stearin) 1,00

Zinc white 5,00

Active carbon technical type ISAF 50,00

Peroxide has been studied 2,5

The stabilizer modifier 2,5

As stabilizers can act as condensation products of diafine NN with odnoklasnoyi gray, or condensation products of n-oxyneocon or oligomeric condensation products of melamine and other amine stabilizers. The modification can be performed in the environment of benzene or toluene in the presence of an acceptor of hydrogen chloride. As a stabilizer modifier rubber mixture may also contain, for example, captax (mercaptobenzothiazole, GOST 739-74), if the organic peroxide is I in the following ratio of components, wt.h.:

Ethylenepropylene rubber, Sept 100,00

Stearic acid technical (stearin) 1,00

Zinc white 5,00

Active carbon technical type ISAF 50,00

Proximo F-40 6,00

Captax 1,00

As the organic peroxides can be used peroxide has been studied, the product of THE MPC 38.40255-83 changes 1-5, Proximo brand F-40 or carbon detonation synthesis (UDS), such as DCP, manufactured by THE 2169-001-11165112-93.

If the organic peroxide is used peroxide has been studied, the mixture is in the following ratio, wt.h.:

Ethylenepropylene rubber, Sept 100,00

Stearic acid technical (stearin) 1,00

Zinc white 5,00

Active carbon technical type ISAF 50,00

Peroxide has been studied 2,5

Captax 1,00

Thus, the technical result is achieved, namely the increase in the service life of the rubber while maintaining the basic performance properties.

The drawing shows the comparative characteristics on the basic properties of rubbers.

Prescription part of the brand 51-2110, wt.h.:

Sept-50 100,0

Sulfur 2,00

Thiuram 0,75

Alopias 0,50

N N’-dithiodimorpholine 1,50

Zinc white 5,00

Stearin 1,00

Resin indeno-nicator 5,00

Total 160,75

Prescription composition trademark LAWSUIT-1098, wt.h.:

Ethylenepropylene rubber, SKEPT-40 100,0

Stearic acid technical (stearin) 1,0

Zinc white 5,0

Carbon technical PM-100 50,0

Proximo F-40 6,0

The stabilizer modifier 2,5

Carbon technical type ISAF - volcano 6 and carbon technical PM-100 interchangeable.

Proximo F-40 interchangeable peroxide has been studied in the amount of 2.5 wt.h.

In the description presented:

table - test results baseline sample of rubber stamps 51-2110 and sample of the rubber mixture of CLAIM 1098;

the drawing is a plot of the voltage drop by 50% (experimental points) from the inverse temperature according to the relaxation of compression. Schedule of calculation of forecasting performance.

The claimed technical result is achieved as follows.

Manufacture of rubber liners to be on rollers, for example, type PD 1500 660/660. Vulcanization of the rubber liners are made, for example, by molding under pressure at a temperature of vulcanization 183÷185°C for 15 minutes. The process of mixing in the mill for the preparation of rubber mixing (dissolving) and the introduction of the ingredients is carried out within VRAM sample in strict accordance with the techniques defined by the relevant Standards. For example, the definition of hardness is determined by the method of determining hardness shore a (GOST 263-75). The base sample was made of rubber stamps 51-2110 at the temperature of vulcanization 158°C for 60 minutes. The obtained test results are presented in the table. This significantly reduces the vulcanization cycle.

The obtained results indicate that the complex properties such as durability, young's modulus, hysteresis and the concentration of effective chains led to the performance of the underlying product at 23°C for 14,2 years, and rubber stamps LAWSUIT-1098 - 34,2 year.

The drawing shows a graphical calculations predict the performance of the baseline sample and the products created by compounding the rubber SUIT-1098. This graph shows the increase in the length of life.

In comparison with the prototype rubber stamps LAWSUIT-1098 has a high elasticity and resistance while maintaining the basic performance properties.

The rubber mixture of working outdoors in areas with temperate and cold climate in the temperature range from -60°C to +55°C. embrittlement Temperature rubbers on the basis of the couch is different rubber General purpose and therefore provides weather resistance, moisture resistance, ozone resistance, weather resistance, including resistance to solar radiation.

Tests to service life prediction of rubber liners for pendants self-supporting fiber optic cables were held in harsh conditions: temperature rise(70÷170°C) the action of aggressive media, the deformation of the tension-compression - 10÷400% and 10÷40% respectively. These tests allowed us to guarantee the lifetime of rubber compound at least 25 years.

Claims

1. Rubber mixture comprising synthetic rubber, zinc, organic peroxide, carbon black, characterized in that the mixture contains as synthetic rubber, ethylenepropylene rubber, SKEPT as carbon technical - active carbon technical type ISAF, as the organic peroxide peroxide has been studied or Proximo F-40, and optionally the acid stearic technical and stabilizer modifier in the following ratio, wt.h.:

Ethylenepropylene rubber, SKEPT 100

Stearic acid 1 technical

Zinc white 5

Active carbon is th mixture under item 1, characterized in that carbon technical type ISAF taken carbon technical Volcano 6.

3. Rubber mixture according to p. 1, characterized in that as carbon technical type ISAF taken the technical grade carbon PM-100.

4. Rubber mixture according to p. 1, characterized in. that rubber mixture as an organic peroxide contains Proximo F-40 and stabilizer modifier - captax in the following ratio, wt.h:

Ethylenepropylene rubber, SKEPT 100

Stearic acid 1 technical

Zinc white 5

Active carbon technical type ISAF 50

Proximo F-40 6

Stabilizer-modifier - captax 2,5

5. Rubber mixture according to p. 1, characterized in. that rubber mixture as the organic peroxide includes hydrogen peroxide has been studied, and stabilizer modifier - captax in the following ratio, wt.h.:

Ethylenepropylene rubber, SKEPT 100

Stearic acid 1 technical

Zinc white 5

Active carbon technical type

ISAF 50

Peroxide has been studied 2,5

Stabilizer-modifier - captax 2,5

6. Rubber mixture according to p. 4, characterized in that it contains components in the following ratio, wt.h:

Teleprot technical type ISAF 50

Proximo F-40 6

Stabilizer-modifier - captax 1



 

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