UA148557U - METHOD OF MAKING A RUBBER MIXTURE - Google Patents

Abstract

A method of manufacturing a rubber mixture includes mixing the ingredients of the rubber mixture in a rubber mixer, sheeting the rubber mixture on the sheet rollers and curing the rubber mixture. Mixing the ingredients of the rubber mixture in the rubber mixer is carried out for 6-8 minutes at a temperature of 135 ° C and a rotor speed of 23-35 rpm, then carry out the correspondence of the rubber mixture on the sheet rollers with a gap of 4-6 mm for 1.5-2, 5 minutes, after which the rubber mixture is removed from the sheet rollers in packages of 10 kg, then the mixed rubber mixture is aged in bags for 24 hours. After that, the mixed rubber mixture, accelerators and ground sulfur are loaded into the chamber of the rubber mixer and mixed for 4-6 minutes at a temperature of up to 110 ° C and a rotor speed of 17 revolutions per minute, after which the rubber mixture is processed on sheet rollers with a gap of 2-4 mm for 1-1.5 minutes.

Description

The useful model belongs to the rubber industry, namely to the method of manufacturing a rubber mixture based on butadiene-nitrile rubber, and can be used, for example, in the light industry in the manufacture of soles and insoles for shoes with improved indicators of oil-gasoline resistance, wear resistance and elasticity.

There is a known method of manufacturing rubber mixture (ША 29875 О, СО8И 17/00, СО8И. 83/00, publ. 25.01.2008), in which the rubber mixture is prepared on rollers Pd 320 160/160 for 15:22 minutes.

The prepared rubber mixture is removed in the form of sheets, vulcanization is carried out in an electric press under a pressure of 200 kg/cm2 for 20 minutes. After vulcanization, the products are cooled, quality is assessed (physical and mechanical parameters) according to GOST 270-75. The method for manufacturing a rubber mixture uses such components as butadiene-nitrile rubber, SKN-18/PVC-30 rubber, sulfur, zinc oxide, mercaptobenzthiazole, carbon black, dibutyl phthalate and stearic acid.

The disadvantage of the known method of manufacturing rubber mixture is that the rubber mixture obtained by this method has low strength, hardness and wear resistance compared to the rubber mixture produced by the claimed method.

The closest to the claimed method is the method of manufacturing rubber mixture (OA 61739 02, СО081 9/02, СО8К 13/02, publ. 15.11.2006), in which the rubber mixture was produced on rollers CM 630 315/315, with the production time varies from 25 to 35 minutes, depending on the dosage of carbon black and dibutyl phthalate. Next, the rubber mixture is laid out for at least 8 hours, after which it is vulcanized at a temperature of (15023) "C for (30:11) minutes.

In this method, such components as hard butadiene-nitrile rubber BNKSO-40A (or 40AN), dithiodimorpholine, thiuram D, sulfenamide C, sulfur, stearic acid, zinc bleach, acetonanil P, technical carbon M 220 and dibutyl phthalate.

The disadvantage of the closest analogue is that the rubber mixture obtained by this method has insufficient physical and mechanical indicators during its operation, namely: too high coefficient of abrasion, low resistance of rubber to aging: ozone and heat.

The basis of a useful model is the task of improving the method of production of rubber mixture, in which, thanks to a new sequence of actions and the use of specially selected components, the improvement of the physical and mechanical properties of the rubber mixture and final products from it, endowment with oil and gasoline-resistant properties and a low rate of volume loss is achieved from abrasion, resistance to aging, ensuring the optimal rheological curve of rubber vulcanization. The specified improvement of the rubber mixture production method is applicable to the production of both black and colored rubber.

The task is solved by the fact that the proposed method of manufacturing rubber mixture, which includes mixing the ingredients of the rubber mixture in a rubber mixer, sheeting the rubber mixture on the sheeting rollers and laying out the rubber mixture, according to the claimed utility model, is carried out as follows: mixing the ingredients of the rubber mixture in a rubber mixer carried out for 6-8 minutes at a temperature of up to 135 "C and a rotor speed of 23-35 revolutions per minute, then the rubber mixture is rolled on rolling rollers with a gap of 4-6 mm for 1.5-2.5 minutes, after which the rubber the mixture is removed from the sheet rollers in bags of 10 kg, then the mixed rubber mixture is laid out in the bags for 24 hours, after which the mixed rubber mixture, accelerators and ground sulfur are loaded into the chamber of the rubber mixer and mixed for 4-6 minutes at a temperature of up to 110 "C and a frequency of rotor revolutions of 17 revolutions per minute, after which the rubber mixture is processed on correspondence rollers with a gap of 2 -4 mm for 1-1.5 minutes, while the following ingredients are used for the production of the rubber mixture in the ratio per 1000 kg, kg:

Base 580.00-620.00 tallow rosin 15.00-20.00 stearin 5.75-6.00 action isononyl phthalate (DINF) 70.00-90.00 active filler 236.00-240.00 zinc bleaches (BCOM) 25-30 00 tiuram 2.35-3.50.

In addition, according to the claimed utility model, technical carbon Mo 339 can be used as an active filler.

In addition, in order to obtain rubber with increased indicators of wear resistance, in accordance with the claimed useful model, silicon dioxide OSTKABIS UM Z - 118.00-120.00 kg and silanized silicon dioxide SOIORBIA can be used as an active filler. - 118.00-120.00 kg.

In addition, to obtain wear-resistant rubber of other colors, except black, to the active filler, namely silicon dioxide OYI TKAZIA. UM Z and silanized silicon dioxide

SOISHRBIA, can add a dye 1.0 95-2.0 95 from the total mass of the mixture due to the corresponding reduction in equal parts of the amount of silicon dioxide SHI TKABIIA MM Z and silanized silicon dioxide SOSHRFZIA..

In addition, butadiene-nitrile rubber can be used as a basis.

In addition, butadiene-nitrile rubber - 491.0-520.0 kg, kaolin P-2 - 70.0-80.0 kg, industrial oil I-40A - 19.0-20.0 kg can be used as a basis .

In addition, synthetic nitrile rubber SKN-18 or SKN-26 or MVK KEK M-18 or MVE KEK M-29 can be used as butadiene-nitrile rubber.

The process of producing a rubber mixture according to the claimed method ensures the production of a rubber mixture with oil-gasoline-resistant properties with a low rate of volume loss due to abrasion.

At the first stage of mixing, the base (580.00-620.00 kg), tallow rosin (15.00-20.00 kg), stearin (5.75-6.00 kg), dizononyl phthalate (DINF) (70 ,00-90,00 kg), active filler (236,00-240,00 kg), zinc bleaches (BCOM) (25,00-30,00 kg), diaphene FP (1,45-1,50 kg) and Naftam-2 (1.45-1.50 kg) and mixed for 6-8 minutes at a temperature of up to 135 "C and a rotor speed of 23-35 revolutions per minute.

The mixing time is 6-8 minutes at the first stage of mixing in the rubber mixer, due to the possibility of using the most common sizes of rubber mixer chambers, namely from 71 dm to 270 dm", and depends on the frequency of revolutions of the rubber mixer rotor.

To prevent the destruction of the polymer and the loss of plasto-rheological properties of rubber

From the mixture, the temperature of the mixture at this stage should not exceed 140 °C.

After the first stage of mixing, the rubber mixture is sheeted in the rubber mixer for 1.5-2.5 minutes on sheeting rollers 1530x550 mm with a gap of 4-6 mm.

After that, the rubber mixture is removed from the letter rollers in 10 kg bags and left for 24 hours. Laying out packages of rubber mixture for 24 hours is necessary to cool the produced rubber mixture to the temperature of the air in the production room.

At the second stage, packets of rubber mixture are loaded into the chamber of the rubber mixer, accelerators - thiazole 2MBS (12.00-14.00 kg), thiuram (2.35-3.50 kg), melena sulfur (11.80-13.50 kg) and mix them for 4-6 minutes at a temperature of up to 110 "C and a rotor speed of 17 rpm.

The mixing time of 4-6 minutes is determined taking into account the fact that the temperature of the rubber mixture during mixing should not exceed 110 "C to ensure the physical and mechanical properties of the rubber mixture.

After the second stage, the rubber mixture is processed on 1530x550 mm sheet rollers with a gap of 2-4 mm for 1-1.5 minutes.

A comparative analysis with the closest analogue allows us to conclude that the claimed method of manufacturing rubber mixture differs from the known one by the introduction of new actions and the use of new components: tallow rosin, dizononyl phthalate (DINF), thiazole 2MBS, diaphene FP, naphtham-2, use as an active filler technical carbon grade Mo 339 or a composition of silicon dioxide SHI TKABIII MM Z and silanized silicon dioxide

SOISHRBIA in a volume ratio of 1:11. Analysis of known methods of manufacturing rubber mixtures, including those based on butadiene-nitrile rubbers, showed that new substances introduced by the claimed method are known. However, their use in combination with other components does not provide rubber compounds produced by known methods with such properties as they show in the claimed utility model. This method of production ensures such a sequence of actions and the use of the necessary components in the required proportions, which add new properties to the manufactured rubber mixture, which allows us to conclude that the declared useful model meets the "novelty" criterion.

In addition, the use of such a component as diisononyl phthalate (DINF) has advantages from the point of view of environmental friendliness of the products that will be made from the rubber mixture produced by the claimed method. Diisononyl phthalate (DINF) is a phthalate plasticizer that is safe for the environment and human health, and due to its low toxicity, it is suitable for the production of absolutely all products that are created according to the standards of DSTU

IBO 9001. The advantages of DINF can also include stability, ensuring high wear resistance of finished products, frost resistance, the presence of electrical insulating properties, resistance to hydrolysis processes and exposure to oxygen, low toxicity and reduced volatility. In general, DINF plasticizer is considered completely harmless and can even be used for the manufacture of products for children and care items.

To obtain rubber with increased indicators of wear resistance, silicon dioxide ОЙ ТКАБИЯ MM 3 and silanized silicon dioxide SOSHRBIA can be used as an active filler according to the claimed method. in a volume ratio of 1:1, the combination of which gives the rubber mixtures produced by the claimed method high abrasion resistance, high tear resistance and good transparency. Such silane-modified materials are used as reinforcing fillers in rubber compounds and can be used in all types of polymers such as ME, IR, ZVE, VC, MVE, EROM, ERM and their mixtures.

To obtain rubber of other colors, except black, to silicon dioxide OI TABIA. UM Z and silanized silicon dioxide SOSHRZIA, which are added in a volume ratio of 171, dyes can be added. As dyes, iron oxide pigments of different colors can be used, depending on the colors of the rubber to be obtained. Such dyes are characterized by high heat resistance, light resistance and atmospheric resistance, are thermally stable relative to the processing temperatures of most polymers and have high coloring ability (color saturation and intensity). The content of pigments in the total mass of the rubber mixture can be approximately 1.0-2.0 9.

By conducting the test, the results of which are shown in Table 1, it was established that the rubber mixture produced according to the stated method allows obtaining the following physical and mechanical indicators of rubber, ensuring the achievement of the stated technical result.

Table 1

Comparative table of the physical and mechanical indicators of the declared rubber with the indicators of the norm ши С о А СН ВЕ--И

Name of the indicator Test norm

Bonding strength of fabric, kKN/m | at least 5o | 60

Loss of rubbing volume, mmU 0 no more than 25.0 | 90

Change in mass of the sample, 9o: in industrial I-20A oil no more than 3.0 0.2 in nefras no more than 10.0 415

З The oil- and gasoline-resistant properties of the rubber, characterized by low rates of change in the mass of the sample in industrial and non-frass oil, are due to the use of synthetic rubbers of the nitrile group with the corresponding mass fraction of the bound nitrile of acrylic acid. Reducing the amount of rubber in the mixture will lead to an increase in the percentage of change of the sample in an aggressive environment, which will lead to a deterioration of its physical and mechanical indicators.

In addition, it will increase the density of the rubber (make it heavier) and worsen the resistance to repeated bending.

The low rate of volume loss from rubber abrasion is due to the combination of the specified amount of rubber and active filler in the mixture in combination with the two-stage rubber manufacturing process, as a result of which a much better distribution ("crosslinking") of the active filler and rubber is achieved. Reducing the polymer group (rubber) or the active filler will lead to increased rubber abrasion.

Reducing the amount of active iononyl phthalate (DINF) will lead to a decrease in the elasticity and plasticity of the rubber, which will worsen the relative elongation at break. Changing the amount of vulcanization agents and accelerators used in this method will lead to a change in the slope and shape of the rheological curve that characterizes the rubber vulcanization process. As a result, the rubber will vulcanize either very quickly ("pick up") or very slowly ("undervulcanization"). Bleach, zinc and stearin also ensure the course of the vulcanization process over time and are, respectively, an activator (bleach) and a retarder (stearin) of vulcanization.

The discrepancy between the number of components and the above-mentioned composition of the rubber mixture used in the claimed method will lead to the deterioration of the physical and mechanical indicators of the rubber, one of the most fundamental of which is the index of abrasion and the change in mass of the sample.

Below is a comparative table of the optimal and non-optimal selection of components for the production of a rubber mixture according to the claimed method (see Table 2).

Table 2

Optimal and suboptimal selection of components

Butadiene-nitrile rubbers (one of the specified)

SKN-18, SKN-26, MVV KEV M-18, MBA KEV M-29 600.00 660.00

Stvaryn////////77711111111111111111111111111111111111601111111111125 SS

Diisononyl phthalate (DINF) 80.00 105.00

Thiazol 2MBS 13.00

Technical carbon Mo 339 (or silicon dioxide

OY TKABIYA. UM Z and silanized silicon dioxide 238.00 174.65

SOISHRFBIA. in a volume ratio of 1:1)

Zinc bleaches (BCOM) 27.50

Ground sulfur p.9990 12.25

Diafen FP 1.475 1.475

Components that affect the creation of rubber with oil and gasoline-resistant properties and a low rate of loss of volume from abrasion, and their optimal quantitative composition, which is used in the manufacture of a rubber mixture according to the claimed method: butadiene-nitrile rubber - 50-60 95, technical carbon Mo 339 (or silicon dioxide ОЙ ТКАБИИ. УМ З and silanized silicon dioxide SOSHRBZIA in a volume ratio of 1:1) - 23.6-24 95, dizononyl phthalate (DINF) - 7.0-9.0 95, bleach zinc (BCOM) - 2.5-3.0 95, diaphene FP and naphtha - 0.145-0.150 95.

Table C lists the functions of the components used in the claimed method, as well as their purpose.

Table C

Functions and purpose of rubber compound components

Synthetic rubbers, polymer group. drink rubber - plasticity, strength, etc. acts as a filler

Industrial oil I-40A

Dizononyl phthalate (DINF) plasticizer Provides increased elasticity and plasticity of the rubber mixture

Thiazol 2MBS accelerator of medium accelerates rubber vulcanization activity

Highly active thiuram accelerates vulcanization of rubber ur accelerator and and In this gu

Table C

Functions and purpose of rubber compound components zenith PI

Technical carbon Mo 339, an active filler with a polymer group ensures the strength of the rubber axis pinnnnenny Pn

MM Z and the silanized active filler with a polymer group provides silicon dioxide SOSHRZBII. strength of rubber vulcanization over time

Sulfur ground p.9990 vulcanization agent n to and :. carries out vulcanization of rubber mixture (ozone and thermal) (ozone and thermal)

Table 4 shows possible examples of the composition of rubber mixtures per 1000 kg of input components

Table 4

Possible compositions of rubber mixtures per 1000 kg

Synthetic rubber MBA KEN M-29.//////// | 50 BO | 77777771 171115

Synthetic rubber MBA SKNATV.DL SG 5eBOYU | 77777772

KaolnP? 77777111 Ї1111750Ї11111111111Ї11

Industrial oil 40A. 77/71 200 HER

Animals.///////77777171717171717171717111111111111111111|111171588.. |... 60 | Yuyuy66e 2

Technical carbon Me 339.../гИгсгсссс1|1200 11111111

OSTKAUBIA silicon dioxide. UM Z and SBS SH in a volume ratio of 1:1) (Dye.//////7777771111111111111111111111111Ї11111111111111Ї1111111111111111111loo1

The useful model is explained by the following implementation examples.

Example 1

At the first stage, synthetic rubber MVK KEK M-29 505.00 kg, kaolin P-2 75.0 kg, industrial oil 20.0 kg, tallow rosin 17.5 kg, stearin 5.88 kg, diisononyl phthalate (DINF ) 80.0 kg, technical carbon Mo 339 240.0 kg, zinc bleaches (BCOM) 27.18 kg, daafen FP 1.47 kg and naphtham-2 1.47 kg and mix the indicated ingredients for 6-8 minutes at a temperature up to 135 "C and a rotor speed of 23-35 revolutions per minute.

After that, the resulting rubber mixture is sheeted for 1.5-2.5 minutes on sheeting rollers 1530x550 mm with a gap of 4-6 mm.

Next, the rubber mixture is removed from the letter rollers in 10 kg bags and left for 24 hours.

At the second stage of mixing, packets of rubber mixture are loaded into the chamber of the rubber mixer,

accelerators - thiazole 2MBS 12.5 kg and thiuram 2.5 kg, melena sulfur p.9990 11.5 kg and are mixed for 4-6 minutes at a temperature of up to 110 "C and a rotor speed of 17 revolutions per minute.

After the second stage of mixing, the rubber mixture is processed in the rubber mixer on the 1530x550 mm sheeting rollers with a gap of 2-4 mm for 1-1.5 minutes.

Thanks to the above-mentioned actions, a black rubber mixture with oil-gasoline-resistant properties and a low index of volume loss due to abrasion is obtained.

Example 2

At the first stage of mixing, synthetic rubber MVK SKN-18 595.00 kg, tallow rosin 17.5 kg, stearin 6.0 kg, dizononyl phthalate (DINF) 85.0 kg, silicon dioxide SHI TKABII MM Z 120.0 kg are added to the rubber mixer , silanized silicon dioxide SOSHRBIA. 118.0 kg, zinc bleaches (BCOM) 27.5 kg, diaphene FP 1.475 kg and Naftam-2 1.475 kg and mix the specified ingredients for 6-8 minutes at a temperature of up to 135 "C and a rotor speed of 23-35 revolutions per minute .

After that, the resulting rubber mixture is sheeted for 1.5-2.5 minutes on sheeting rollers 1530x550 mm with a gap of 4-6 mm.

Next, the rubber mixture is removed from the letter rollers in 10 kg bags and left for 24 hours.

At the second stage of mixing, packets of rubber mixture, accelerators - thiazole 2MBS 13.0 kg and thiuram 2.8 kg, and ground sulfur p.9990 12.25 kg are loaded into the chamber of the rubber mixer and mixed for 4-6 minutes at a temperature of up to 105 "С and the frequency of rotation of the rotor is 17 revolutions per minute.

After the second stage of mixing, the rubber mixture is processed in the rubber mixer on the 1530x550 mm sheeting rollers with a gap of 2-4 mm for 1-1.5 minutes.

Thanks to the above actions, a gray-white rubber mixture with increased wear resistance is obtained.

Example C

At the first stage of mixing, synthetic rubber MVK KEK-29 597.5 kg, tallow rosin 20.0 kg, stearin 5.88 kg, disononyl phthalate (DINF) 80.0 kg, silicon dioxide are added to the rubber mixer

OGTAABII MM 3 115.0 kg, SOSHRBII silanized silicon dioxide 115.0 kg, iron oxide red pigment 10.00 kg, zinc bleaches (BCOM) 27.18 kg, diaphene FP 1.47 kg and Naftam-2 1.47

From kg and mix the specified ingredients for 6-8 minutes at a temperature of up to 135 "C and a rotor speed of 23-35 revolutions per minute.

After that, the resulting rubber mixture is sheeted for 1.5-2.5 minutes on sheeting rollers 1530x550 mm with a gap of 4-6 mm.

Next, the rubber mixture is removed from the letter rollers in 10 kg bags and left for 24 hours.

At the second stage of mixing, packets of rubber mixture, accelerators - thiazol 2MBS 12.5 kg and thiuram 2.5 kg, and ground sulfur p.9990 11.5 kg are loaded into the chamber of the rubber mixer and mixed for 4-6 minutes at a temperature of up to 110 "С and the frequency of rotation of the rotor is 17 revolutions per minute.

After the second stage of mixing, the rubber mixture is processed in the rubber mixer on the 1530x550 mm sheeting rollers with a gap of 2-4 mm for 1-1.5 minutes.

Thanks to the above actions, a red rubber mixture with increased wear resistance is obtained.

Implementation of the declared utility model is possible on existing equipment.

The use of this useful model ensures the improvement of the physical and mechanical properties of the final products made from the rubber mixture, endows them with oil and gasoline resistant properties, a low index of volume loss from abrasion, resistance to aging, provides an optimal rheological curve of rubber vulcanization, which makes it possible (its use, for example, for the production of shoes used in particularly difficult operating conditions. (c;

Claims (7)

USEFUL MODEL FORMULA 1. The method of manufacturing rubber mixture, which includes mixing the ingredients of the rubber mixture in a rubber mixer, sheeting the rubber mixture on sheeting rollers and laying out the rubber mixture, which is characterized by the fact that the mixing of the ingredients of the rubber mixture in the rubber mixer is carried out for 6-8 minutes at a temperature of up to 135 "С and the frequency of rotation of the rotor is 23-35 revolutions per minute, then the rubber mixture is rolled on the rolling rollers with a gap of 4-6 mm for 1.5-2.5 minutes, after which the rubber mixture is removed from the rolling rolls in 10 kg bags, then mixed the rubber mixture is laid out in bags for 24 hours, after which the mixed rubber mixture, accelerators and ground sulfur are loaded into the chamber of the rubber mixer and mixed for 4-6 minutes at a temperature of up to 110 "C and a rotor speed of 17 revolutions per minute, after which the rubber mixture is processed on sheeting rollers with a gap of 2-4 mm for 1-1.5 minutes, while the following and ingredients, in the ratio per 1000 kg, kg: base 580.00-620.00 tallow rosin 15.00-20.00 stearin 5.75-6.00 action isononyl phthalate (DINF) 70.00-90.00 active filler 236, 00-240.00 zinc bleaches (BCOM) 25.00-30.00 ground sulfur p.9990 11.00-13.50 diaphene FP 1.45-1.50 naphtham-2 1.45-1.50 thiazole accelerators 2-X MBS 12.00-14.00 tiuram 2.35-3.50. 2. The method of manufacturing a rubber mixture according to claim 1, which differs in that technical carbon Mo 339 is used as an active filler. Q. The method of manufacturing a rubber mixture according to claim 1, which differs in that as an active filler, silicon dioxide OGTKABIA MM 3-118.00-120.00 kg and silanized silicon dioxide SOSHRBIA -118.00-120.00 kg are used. 4. The method of manufacturing a rubber mixture according to item C, which differs in that a dye of 1.0 95-2.0 95 of the total mass of the mixture is added to the active filler due to the corresponding reduction in equal parts of the amount of silicon dioxide OGTKAZBII MM Z and silanized dioxide silicon SOSHRBIA.. 5. The method of manufacturing a rubber mixture according to claim 1, which differs in that butadiene-nitrile rubber is used as a basis. b. The method of manufacturing a rubber mixture according to claim 1, which differs in that butadiene-nitrile rubber is used as a basis - 491.0-520.0 kg, kaolin P-2-70.0-80.0 kg, industrial oil I-40A 19 ,0-20.0 kg. 7. The method of manufacturing a rubber mixture according to claim 5 or 6, which differs in that synthetic rubber of the nitrile group SKN-18 or SKN-26 or MVA KEV M-18 or MBEK KER M-29 is used as butadiene-zo nitrile rubber.