RU2315783C1 - Method of production of the rubber compositions - Google Patents

Abstract

FIELD: mechanical rubber industry; other industries; methods of production of the non-shrinking rubber compositions.

SUBSTANCE: the invention may be used in tires production and other works of the mechanical rubber industry for production of the non-shrinking rubber compositions. The method of production of the rubber composition provides for pretreatment of the rubber component of the rubber composition with the subsequent introduction in it by means of the mixing equipment of the remaining ingredients. The caoutchouc is previously crumbled in the chips with the dimension of 0.1-50 mm. Then the chips of the caoutchouc is multiply is worked by the protrusions of the disk (discs) rotating inside the apparatus of the percussively- activating type. The rate of rotation is 3000-20000 rpm. The technical result of the invention consists in the decreased rigidity, the reduced elastic recovery and the increased plasticity of the rubber compositions, that allows to produce the semi-finished products with the heightened dimensional accuracy, and also in the reduction of the power inputs at manufacture and molding of these semi-finished products and in improvement of the complex of the physical-mechanical parameters of the rubbers.

EFFECT: the invention ensures: the decreased rubber compositions rigidity, the increased plasticity, production of the semi-finished products with the heightened dimensional accuracy, the reduced power inputs at manufacture and molding of these semi-finished products, the improved complex of their physical-mechanical parameters.

3 tbl, 24 ex

Description

The invention can be used in the tire and rubber industry to obtain non-shrinking rubber compounds.

Known mixing methods are batch mixing in closed rubber mixers [F.F.Koshelev, A.E. Kornev, A.M. Bukanov. General technology of rubber. - M .: Chemistry, 1978, pp. 325-340] or in continuous operation machines [F.F.Koshelev, A.E. Kornev, A.M. Bukanov. General technology of rubber. - M .: Chemistry, 1978, pp. 340-342].

The closest is the method of preparation of rubber compounds on rollers [F.F.Koshelev, A.E. Kornev, A.M. Bukanov. General technology of rubber. - M .: Chemistry, 1978, p. 321-325]. To do this, rubber and other ingredients are loaded onto rolls that rotate towards the gap between them. Layers of rubber in contact with the surface of the rolls, due to the forces of adhesion and friction, are drawn into the gap between the rolls at a speed corresponding to the peripheral speed of the rolls. Of great importance when mixing on rollers is the order of introduction of the components. First, rubber is loaded onto the rollers and processed until it stops slipping on the rollers. Then dispersing agents (fatty acids), vulcanization accelerators and activators are sequentially introduced into the mixture. Of great importance is the loading order of carbon black and plasticizers. For better dispersion, fillers are typically loaded in separate portions. Since plasticizers reduce the viscosity of the rubber compound and shear stress during its deformation, they are usually introduced after fillers. Sometimes, to prevent an excessive increase in the stiffness of the mixture, energy consumption, and the spacer forces between the rollers, plasticizers are added to the mixture after some part of the fillers are introduced into them. To avoid scorching, vulcanizing agents are usually added to the rubber composition at the end of the mixing process. If the vulcanizing agent is poorly dispersed in the mixture (for example, sulfur in nitrile butadiene rubber), then it is introduced at the beginning of the mixing process, and vulcanization accelerators at the end.

After the introduction of the ingredients, the mixture is always subjected to thorough homogenization (cut, rolled up and fed into the gap between the rollers in another place). The best results are achieved if the roll of mixture is directed into the gap perpendicular to the rolls, i.e. the end of the roll into the gap.

The disadvantage of these methods is that the rubber mixtures prepared by their use have the so-called highly elastic shrinkage of semi-finished products after shaping them using mold-forming equipment [D.L. Fedyukin, F.A. Makhlis. Technical and technological properties of rubbers. - M .: Chemistry, 1985, p.36]. Highly elastic shrinkage is manifested, as a rule, in the reduction of the size of the semi-finished product in the direction of exit from the forming channel and the increase in size in the transverse direction (swelling). All this leads to a distortion of the shape of the resulting semi-finished product, which often leads to marriage.

In the rubber industry, there are several ways to reduce the highly elastic shrinkage of rubber compounds. The first and most common method is the aging of rubber semi-finished products after their manufacture for a certain time. So, in the manufacture of automobile cameras, their blanks from rubber compound must be aged on shelves for at least two hours [A.A. Mukhutdinov, V.P. Dorozhkin, Yu.O. Averko-Antonovich, M.A. Polyak. An album of technological schemes of the main productions of the rubber industry. - M.: Chemistry, 1980, p.30]. The disadvantage of this method is that for an acceptable aging time for industry, highly elastic shrinkage does not have time to complete, and it continues even after the vulcanization of the product obtained from the rubber semi-finished product. This leads to internal stresses in the product and often to warpage. Another disadvantage is the need to have additional production space for the shelving, where rubber semi-finished products are matched.

The next way to reduce highly elastic shrinkage is to reduce the speed of obtaining a semi-finished rubber product (for example, reducing the speed of extrusion on the tread assembly of a car tire blank). This method has not found application in the rubber industry for the following reasons: firstly, a decrease in the speed of production of rubber semi-finished products reduces the productivity of molding equipment; secondly, as in the first method, highly elastic shrinkage does not completely disappear.

The third way is to create elevated temperatures in the rubber compound at the time of giving it a certain shape. In this case, the rate of highly elastic shrinkage will increase, and it partially proceeds during the manufacture of the semi-finished product. This method has not found application due to the fact that increasing the temperature of the rubber compound often leads to its premature vulcanization, which is why it loses its technological properties.

The fourth way to reduce highly elastic shrinkage can be called prescription. An ingredient is introduced into the rubber composition, which leads to a decrease in the value of highly elastic shrinkage. Most often, the role of such an ingredient is carbon black (soot). The effect of the introduction of soot primarily depends on its quantity and structure [D.L. Fedyukin, F.A. Makhlis. Technical and technological properties of rubbers. - M .: Chemistry, 1985, p.38]. A noticeable decrease in shrinkage of the rubber semi-finished product can be achieved with the introduction of soot in the amount of 50 or more mass parts per 100 wt. parts of rubber. For example, the introduction of carbon black in an amount of 50 wt. parts per 100 wt. parts of natural rubber reduces high elastic shrinkage from 2 times, that is, 100%, for styrene butadiene rubber by 1.5 times, that is, 66.7%. Among the disadvantages of this method, the following can be distinguished. To significantly reduce high elastic shrinkage, a large amount of an ingredient with a given action effect must be introduced into the rubber compound. So that highly elastic shrinkage is reduced by 50-60% per 100 wt. parts of rubber, you must enter at least 50 wt. parts of carbon black, rubrax or bitumen, or other ingredient that causes a decrease in shrinkage. Such an actual dilution of a highly elastic rubber material with a large amount of inelastic material in parallel with solving the problem of reducing shrinkage leads to an undesirable deterioration, first of all, of the strength properties of rubbers, and in some cases (for example, when carbon black is introduced), an increase in stiffness and a decrease in ductility of the rubber compound.

The objective of the invention is to reduce the highly elastic shrinkage of rubber compounds without compromising their technological properties and reducing the physico-mechanical and operational properties of rubbers based on them, which were noted when considering known methods.

The proposed method for producing a rubber mixture consists in pretreating the rubber component of the rubber mixture with the subsequent introduction of the remaining ingredients into it using mixing equipment.

The processing of rubber consists in the creation of repeated impact by the protrusions of the disk (s) rotating (rotating) inside the apparatus of the shock-activating type at a speed of 3000-20000 revolutions per minute for 1-120 minutes (table 1).

Processing is carried out using shock-activating apparatuses, for example, using a double-disc apparatus with various shapes of protrusions. In this case, the rubber is subjected to rapidly alternating counter-impacts by the protrusions of the disks rapidly rotating in the opposite direction, and its particles are repeatedly accelerated and braked for thousandths of a second. The total flow of rubber particles moves from the center of the disks where loading is performed to the periphery where the unloading is carried out [I. Khint. UDA technology: problems and prospects. - Tallinn: Valgus, 1981 - p. 26]. The processing of rubber leads to a decrease in their stiffness, a decrease in elastic recovery and an increase in ductility (table 2). The use of treated rubber as the rubber component of the rubber mixture allows them to give increased ductility, reduced stiffness and makes them virtually non-shrinking due to the very small amount of elastic recovery (table 2).

All this allows you to reduce energy consumption in the manufacture of rubber compounds on mixing equipment and in the molding of rubber compounds of semi-finished products by calendering and extrusion. In addition, the practical absence of elastic recovery (shrinkage) in rubber compounds leads to semi-finished products with increased dimensional accuracy, which in turn allows to reduce the tolerances on the geometric dimensions and, ultimately, to reduce their weight, and hence the consumption of the rubber mixture .

This method of manufacturing rubber compounds allows to obtain rubber with an improved set of physical and mechanical properties (table 3).

The problem is solved in that the rubber before making the rubber mixture from it is first crushed into crumbs of size 0.1-50 mm, and then the crumb is subjected to multiple impacts by the protrusions of the disc (s) (rotors with fingers) rotating (them) inside the apparatus shock-activator type with a speed of 3000-20000 rpm for 1-120 minutes. Subsequently, the rubber mixture is prepared from the treated rubber in the mixing equipment in the traditional way.

Processing objects may be saturated or unsaturated rubbers.

The technical problem can be solved using devices shock-activator type.

The technical problem can be solved by using any equipment for mixing: rubber mixers, roll machines, worm machines.

The technical solution is illustrated by the following examples of specific performance.

Example 1

SKI-3 brand isoprene rubber was crushed into crumbs 1-3 mm in size. Further, the crumb was poured into the neck of the apparatus, inside of which it is subjected to mechanical impacts of the protrusions of the disk, rotating at a speed of 6300 per minute. The processing time was 1.0 minute. Plastoelastic properties of the processed rubber SKI-3 are shown in table 2.

From the SKI-3 treated rubber on the rollers, a standard rubber compound was made [Handbook of the rubber worker. Rubber production materials. - M: Chemistry, 1971, p. 36] according to the following recipe:

Rubber SKI-3 100 parts by weight Sulfur 1.0 parts by weight Altax 0.6 parts by weight DFG (diphenylguanidine) 3.0 parts by weight Stearic acid 1.0 parts by weight Zno 5.0 parts by weight Neozone D 0.6 parts by weight Diphenyl-p-phenylenediamine 0.5 parts by weight Carbon black 50 parts by weight

The plastoelastic properties of the rubber compound made of SKI-3 treated rubber are shown in Table 2.

The prepared rubber mixture was then vulcanized in a press at a temperature of 133 ° C for 30 minutes.

Physico-mechanical properties of rubber are shown in table 3.

Example 2. SKI-3 rubber was processed analogously to example 1 with the exception of: processing time 6.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 3. SKI-3 rubber was processed analogously to example 1 with the exception of: disk speed of 14000 per minute. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 4. Rubber SKI-3 was processed analogously to example 1 with the exception of: the number of revolutions of the disk 17500 per minute. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 5. Rubber SKI-3 was processed analogously to example 1 with the exception of: rubber was crushed to a size of 20-40 mm; processing time 6.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 6. SKI-3 rubber was processed analogously to example 1 with the exception of: the rubber was crushed to a size of 3-6 mm; the number of revolutions of the disk 3000 per minute; processing time 10.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 7. SKI-3 rubber was not pretreated. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 8

SMR-5 natural rubber was crushed into crumbs with a size of 1-5 mm. Then, the resulting crumb was poured into the neck of the apparatus, where it was subjected to mechanical impacts of the protrusions of the disk, rotating with a speed of 5800 per minute. Processing time was 2 minutes.

The plastoelastic properties of the treated natural rubber SMR-5 are shown in table 2.

From the processed natural rubber SMR-5 on the rollers, a standard rubber compound was made [Directory of the rubber worker. Rubber production materials. - M .: Chemistry, 1971, p. 32] according to the following recipe:

Rubber SMR-5 100 parts by weight Sulfur 1.0 parts by weight Altax 0.6 parts by weight Diphenylguanidine 3.0 parts by weight Zno 5.0 parts by weight Stearic acid 1.0 parts by weight Carbon black K-234 50.0 parts by weight

The plastoelastic properties of the obtained rubber mixture from processed natural rubber SMR-5 are shown in table 2.

The resulting rubber mixture was then vulcanized in a press at a temperature of 133 ° C for 30 minutes.

Physico-mechanical properties of the obtained rubber are shown in table 3.

Example 9. Rubber SMR-5 was processed analogously to example 8 except: the rubber was crushed to sizes 5-10 mm; processing time 4.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 8.

Example 10. The rubber SMR-5 was processed analogously to example 8 except: the rubber was crushed to sizes 1-3 mm; the number of revolutions of the disk 14000 per minute. The preparation of the rubber compound and its vulcanization were carried out analogously to example 8.

Example 11. Rubber SMR-5 was processed analogously to example 8 except: the rubber was crushed to sizes 5-15 mm; the number of revolutions of the disk 6300 per minute; processing time 10.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 8.

Example 12. The rubber SMR-5 was processed analogously to example 8 except: the rubber was crushed to a size of 5-10 mm; the number of revolutions of the disk 6300 per minute; processing time 110.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 8.

Example 13. Rubber SMR-5 was not pre-processed. The preparation of the rubber compound and its vulcanization were carried out analogously to example 8.

Example 14

SKD II butadiene rubber was crushed into 0.5–2.0 mm crumbs. Further, the crumb is poured into the neck of the apparatus, inside of which it was subjected to mechanical impacts of the protrusions of the disk, rotating at a speed of 6300 per minute. The mechanical exposure time was 1.0 minute. Plastoelastic properties of the treated rubber SKD II are shown in table 2.

From the treated rubber SKD II on the rollers a standard rubber mixture was made [Directory of the rubber worker. Rubber production materials. - M .: Chemistry, 1971, p. 44] according to the following recipe:

Rubber SKD II 100 parts by weight Sulfur 2.0 parts by weight Santokyur 0.7 parts by weight Stearic acid 2.0 parts by weight Zno 5.0 parts by weight Rubrax 5.0 parts by weight Carbon black 50 parts by weight

Plastoelastic properties of the rubber mixture of treated rubber SKD II are shown in table 2.

The prepared rubber mixture was then vulcanized in the press at a temperature of 143 ° C for 40 minutes.

Physico-mechanical properties of the obtained rubber are shown in table 3.

Example 15. Rubber SKD II was processed analogously to example 14 with the exception of: the rubber was crushed to a size of 1-5 mm; 5800 revolutions per minute; processing time 3.0 minutes. The preparation of the rubber compound and its vulcanization were carried out analogously to example 14.

Example 16. Rubber SKD II was not previously processed. The preparation of the rubber compound and its vulcanization was carried out analogously to example 14.

Example 17. A mixture of rubbers SKI-3 and SMR-5 in a ratio of 1: 1 by weight was processed analogously to example 1.

From the treated mixture of rubbers SKI-3 and SMR-5 on the rollers, a rubber mixture was made according to the following recipe:

Rubber SKI-3 50 parts by weight Rubber SMR-5 50 parts by weight Sulfur 1.0 parts by weight Altax 0.6 parts by weight DFG (diphenylguanidine) 3.0 parts by weight Stearic acid 1.0 parts by weight Zno 5.0 parts by weight Neozone D 0.6 parts by weight Diphenyl-p-phenylenediamine 0.5 parts by weight Carbon black 50 parts by weight

The plastoelastic properties of the rubber mixture from the treated rubber mixture SKI-3 and SMR-5 are shown in table 2.

The prepared rubber mixture was then vulcanized in a press at a temperature of 133 ° C for 30 minutes.

Example 18. It was performed as example 17, except that the mixture of rubbers SKI-3 and SMR-5 was not pre-processed. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 19

The ethylene-propylene rubber SKEP was crushed into crumbs with a size of 0.5-2.0 mm Further, the crumb is poured into the neck of the apparatus, inside of which it was subjected to mechanical impacts of the protrusions of the disk, rotating at a speed of 6300 per minute. The mechanical exposure time was 1.0 minute. Plastoelastic properties of the treated rubber SKEP are shown in table 2.

A standard rubber compound was made from SKEP rubber on rollers [Rubber Handbook. Rubber production materials. - M .: Chemistry, 1971, p. 110] according to the following recipe:

SKEP rubber 100 parts by weight Dicumyl Peroxide 3.0 parts by weight Sulfur 0.4 parts by weight Zno 3.0 parts by weight Carbon black 50 parts by weight

The plastoelastic properties of the rubber mixture of the processed rubber SKEP are shown in table 2.

The prepared rubber mixture was then vulcanized in the press at a temperature of 151 ° C for 40 minutes.

Physico-mechanical properties of the obtained rubber are shown in table 3.

The conditions for carrying out examples 1-20 are summarized in table 1.

Example 20. Rubber SKD II was not pre-processed. The preparation of the rubber compound and its vulcanization were carried out analogously to example 19.

Example 21. SKI-3 rubber was processed analogously to example 1 with the exception of: a double-disk apparatus was used, the number of revolutions of the disks was 7000 per minute. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1.

Example 22. Rubber SKD II was processed analogously to example 14 with the exception of: a two-disk apparatus was used, the number of revolutions of the disks was 9600 per minute. The preparation of the rubber compound and its vulcanization were carried out analogously to example 14.

Example 23. Rubber SKI-3 was processed analogously to example 1. The preparation of the rubber compound and its vulcanization were carried out analogously to example 1 with the exception of: instead of 50 wt.h. carbon black used 30 wt.h. white soot.

Example 24. Rubber SKEP was processed analogously to example 19. The preparation of the rubber compound and its vulcanization were carried out analogously to example 19 with the exception of: instead of 50 wt.h. carbon black used 40 wt.h. white soot.

Table 2 shows the properties of the starting rubbers and standard rubber compounds based on them and the properties of the treated rubbers and standard rubber compounds based on the treated rubbers. Table 3 shows the main physical and mechanical properties of rubbers from standard rubber compounds based on raw and processed rubbers.

The analysis of tables 1-3 leads to the following conclusions.

Firstly, the preparation of rubber compounds according to the proposed method leads to a significant reduction in highly elastic shrinkage. For mixtures based on treated rubber SKI-3 (examples 1-6, 21, 23), the shrinkage is only 1% to 30% of the shrinkage of the rubber mixture based on untreated SKI-3 (example 7) (Table 2).

Secondly, rubber compounds in comparison with the prototype almost 2 times less rigid and 1.5-2 times more plastic, which reduces energy consumption during their further processing.

Similar results (table 2) are obtained in the manufacture of rubber compounds according to the proposed method from natural rubber (examples 8-13), butadiene rubber (examples 14-16, 22) and ethylene-propylene (examples 19-20, 24). Obtaining a rubber mixture according to the proposed method from two different rubbers (example 17) also leads to a sharp decrease in shrinkage and stiffness and an increase in ductility in comparison with the use of a mixture of untreated rubbers (example 18).

In addition, examples 21 and 22 show the possibility of using shock-activator type multi-disc machines to obtain similar results.

Examples 23 and 24 show the possibility of using white soot as a filler. In addition, any other suitable substances and materials can be used as filler: kaolin, chalk, dispersed powders of organic and inorganic nature, fibers.

Obtaining a rubber mixture according to the proposed method with subsequent vulcanization allows to obtain rubber with higher tear resistance and hardness. This is evidenced by the data in table 3. Increased tear resistance is necessary for rubber products subjected to cuts and punctures. It is especially important to have this indicator high for tire tread rubber, lining rubber for conveyor belts for transporting coal and various ores, etc.

Table 1
Plastoelastic properties of rubbers and rubber compounds Example No. Rubber Processing Conditions The compounding of rubber compounds Vulcanization mode Rubber grade The size of the crumb, mm The number of revolutions of the disk, rpm Crumb processing time, min Temperature ° C Time min one SKI-3 1-3 6300 1,0 Standard black for SKI-3 133 thirty 2 SKI-3 1-3 6300 6.0 According to example 1 133 thirty 3 SKI-3 1-3 14000 1,0 According to example 1 133 thirty four SKI-3 1-3 17500 1,0 According to example 1 133 thirty 5 SKI-3 20-40 6300 6.0 According to example 1 133 thirty 6 SKI-3 3-6 3000 10.0 According to example 1 133 thirty 7 SKI-3 - - - According to example 1 133 thirty 8 SMR-5 1-5 5800 2.0 Standard carbon black filled for natural rubber 133 thirty 9 SMR-5 5-10 5800 4.0 For example 8 133 thirty 10 SMR-5 1-3 14000 2.0 For example 8 133 thirty eleven SMR-5 5-10 6300 10.0 For example 8 133 thirty 12 SMR-5 5-10 6300 60 For example 8 133 thirty 13 SMR-5 - - - For example 8 133 thirty fourteen SKD II 0.5-2.0 6300 1,0 Standard Sazhenapolnenny for SKD II 143 40 fifteen SKD II 0.5-2.0 6300 3.0 For example 14 143 40 16 SKD II - - - For example 14 143 40 17 SKI-3 (50 parts by mass) + SMR-5 (50 parts by mass) 1-3 6300 1,0 Standard black for SKI-3 133 40 eighteen SKI-3 (50 parts by mass) + SMR-5 (50 parts by mass) For example 17 133 40 19 SKEP 1-2 6300 2.0 Standard Sazhenapolnenny for SKEP 151 40 twenty SKEP - - - For example 19 151 40 21 SKI-3 1-3 7000 * 1,0 According to example 1 133 thirty 22 SKDP 0.5-2.0 9600 * 1,0 For example 14 143 40 23 SKI-3 1-3 6300 1,0 According to example 1, with the replacement of 50 m.h. those. carbon per 30 m.h. white soot 133 thirty 24 SKEP 1-2 6300 2.0 According to example 19, with the replacement of 50 m.h. those. carbon per 40 m.h. white soot 151 40 * - experiments were carried out using a two-disk apparatus

table 2
Plastoelastic properties of rubbers and rubber compounds Example Number Rubbers Rubber compounds Defoe stiffness, gf Carrera ductility Highly elastic shrinkage, mm Defoe stiffness, gf Carrera ductility Highly elastic shrinkage, mm one 1450 0.65 0.4 870 0.61 0.1 2 780 0.822 0.02 920 0.819 0.01 3 540 0.89 0.01 700 0.87 0.01 four 800 0.84 0,03 820 0.79 0.02 5 810 0.58 0.12 890 0.81 0.12 6 920 0.71 0.9 980 0.69 0.75 7 2260 0.36 3.3 1650 0.42 2,5 8 3000 0.47 3.0 820 0.72 0.2 9 2100 0.54 2,5 760 0.84 0.18 10 2300 0.52 2.7 820 0.79 0.21 eleven 1900 0.61 1,5 730 0.86 0.05 12 1910 0.68 1.4 710 0.87 0.05 13 3200 0.29 3,7 2700 0.56 3.3 fourteen 1390 0.57 1,0 1700 0.63 1,6 fifteen 1100 0.61 0.08 1650 0.7 1.4 16 1800 0.40 1,0 2030 0.29 2.2 17 1630 0.51 1.8 840 0.68 0.15 eighteen 1780 0.34 3.8 2200 0.51 2,8 19 340 0.54 0.35 530 0.67 0.05 twenty 650 0.38 4.1 830 0.42 3.6 21 1420 0.67 0.40 860 0.62 0.1 22 1350 0.56 0.9 1670 0.62 1.4 23 1410 0.68 0.38 850 0.62 0.11 24 320 0.56 0.34 510 0.69 0.05

Table 3
The main physical and mechanical properties of rubbers Example Number Conditional tensile strength, MPa Tear resistance, kN / m Elongation at break,% Conditional stress at 300% elongation, MPa Bounce Elasticity,% Hardness according to TM-2 one 37 128 600 8.6 40 57 2 25 114 610 8.3 40 42 3 25.6 85 650 3.2 39 45 four 33 120 680 7.3 37 52 5 23.8 81 640 4.3 39 48 6 30,4 81 620 6.3 42 45 7 31.8 78 620 6.4 44 45 8 35 86 570 11.6 48 54 9 34.1 82 570 11,4 48 53 10 35,2 93 590 12.1 49 51 eleven 32 81 590 10.5 46 fifty 12 thirty 76 600 10.1 48 fifty 13 35 74 580 10.3 46 49 fourteen 21 45 450 9.5 51 63 fifteen 20.3 43 470 9.1 51 62 16 twenty 40 470 8.0 fifty 62 17 35.1 94 630 10.1 48 55 eighteen 33 77 610 8.1 46 48 19 24.1 59 540 12.1 49 57 twenty 22.6 41 520 10,2 46 61 21 37 128 600 8.6 40 57 22 21 45 450 9.5 51 63 23 29.4 105 630 7.9 38 51 24 19.9 53 550 11,4 46 52

Claims (1)

A method of producing a rubber mixture comprising rubber, vulcanizing agents, activators, fillers, if necessary, vulcanization accelerators, antioxidants, plasticizers, characterized in that the rubber is preliminarily crushed into crumbs with a size of 0.1-50 mm, after which it is repeatedly processed with disc protrusions (s) rotating (them) inside the apparatus of shock-activating type at a speed of 3000-20000 rpm for 1-120 minutes