Anti-corrosion wear-resistant rubber material and preparation method thereof

Abstract

The invention discloses an anti-corrosion and wear-resistant rubber material and a preparation method thereof, relates to the technical field of rubber material preparation, and aims to solve the problem that when the carbon black proportion is increased, carbon black agglomeration easily occurs, which greatly affects the quality and performance of the rubber material, and when a traditional internal mixer mixes rubber raw materials, the treatment effect on high-proportion carbon black is often poor. Carbon black agglomeration may cause non-uniformity of a rubber material and reduce key performance indexes such as corrosion resistance, wear resistance, elasticity and flexibility of the rubber material, and the wear resistance of the rubber material is remarkably improved by optimizing a raw material formula, increasing the ratio of the carbon black and reasonably matching other components; by adding the hydroxyl-terminated polybutadiene liquid rubber, the elasticity and the flexibility are balanced; in the mixing stage, nitrogen is continuously introduced, and a special internal mixer design is adopted, so that rubber oxidation is effectively prevented, carbon black agglomeration is avoided, the uniformity and performance stability of the material are improved, and the rubber material has longer service life and better stability in a high-abrasion and corrosive environment.

Description

Technical Field

[0001] The invention relates to the technical field of rubber material preparation, in particular to an anti-corrosion and wear-resistant rubber material and a preparation method thereof. Background Art

[0002] As an important industrial material, rubber materials are widely used in many fields. However, in many practical use environments, rubber materials face severe challenges. For example, in some specific working environments, such as chemical and marine fields, rubber materials will be exposed to various corrosive media, which puts high demands on the corrosion resistance of rubber.

[0003] In this regard, patent CN109438788A discloses an anti-corrosion and wear-resistant rubber material and a preparation method thereof. The rubber material is made of the following raw materials in parts by weight: 20-30 parts of chloroprene rubber, 50-60 parts of butadiene rubber, 15-20 parts of ammonium polyphosphate, 35-50 parts of phenolic resin, 7-15 parts of white carbon black, 1-5 parts of silane coupling agent, 8-16 parts of bamboo fiber, 1-2 parts of polypropylene fiber, 2-5 parts of magnesium oxide powder, 1-4 parts of zinc oxide powder, 3-8 parts of stearic acid, 1-6 parts of cyclohexane oil, 1-4 parts of antioxidant, 2-7 parts of accelerator, 2-6 parts of vulcanizing agent, 1-5 parts of diphenylsilanediol, and 2-8 parts of resol phenolic resin; the raw materials for preparing the rubber material provided by the above patent cooperate with each other, play a good anti-corrosion and wear-resistant role, enhance the durability of the rubber material, and improve the service life.

[0004] With the continuous development of the rubber industry, the performance requirements for rubber materials are getting higher and higher, especially in terms of corrosion resistance and wear resistance. In the preparation process of rubber materials, carbon black is an important reinforcing agent, and the increase in its proportion can significantly enhance the wear resistance and other properties of rubber. However, when the proportion of carbon black increases, the problem of carbon black agglomeration is prone to occur, which greatly affects the quality and performance of rubber materials. When mixing rubber raw materials, traditional internal mixers often have poor effects on the treatment of high-proportion carbon black. Carbon black agglomeration may lead to unevenness of rubber materials, reducing their corrosion resistance, wear resistance, elasticity and flexibility and other key performance indicators.

[0005] In view of the above problems, a corrosion-resistant and wear-resistant rubber material and a preparation method thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an anti-corrosion and wear-resistant rubber material and a preparation method thereof, which solves the problem of carbon black agglomeration in the preparation of anti-corrosion and wear-resistant rubber in the background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an anti-corrosion and wear-resistant rubber material, comprising 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 55 parts of carbon black N3345-5, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 10 parts of hydroxyl-terminated polybutadiene (HTPB) liquid rubber;

[0008] Nitrogen is continuously introduced into the rubber material mixing stage. The rubber material mixing process includes sequentially putting nitrile rubber and chloroprene rubber into the internal mixer, mixing for 2-3 minutes at a temperature of 120°C in the mixing drum and 135°C in the circulating drum and a speed of 40-55r / min, then adding 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of antioxidant 4010NA, 1-2 parts of antioxidant RD, and 10-15 parts of cyclohexane oil and continuing to mix for 2-3 minutes, and then adding carbon black N330 and white carbon black in batches, with the total amount of carbon black and white carbon black added each time being 10% of the total amount of carbon black and white carbon black added each time. After each addition, mix for 2-3 minutes, then add 8-12 parts of hydroxyl-terminated polybutadiene liquid rubber and mix for 3-4 minutes, and nitrogen is introduced during the mixing process. The vulcanization stage includes adding 1.5-2.5 parts of sulfur, 1-2 parts of accelerator DM, and 0.5-1 part of accelerator TMTD to the mixed rubber after processing on an open mill.

[0009] The internal mixer for preparing rubber materials comprises a supporting base, a mixing drum is installed at the top of the supporting base, a circulating drum is arranged at the top of the mixing drum, the mixing drum is divided into upper and lower sections, the upper section is wrapped by the circulating drum, and the outer surface of the lower section is fixedly connected to a fixing frame, a separation assembly is also arranged on the fixing frame, the separation assembly comprises a U-shaped tube, the U-shaped tube is embedded in the lower section of the mixing drum, a circulating tube is embedded in the interior of the U-shaped tube, a driving motor is also embedded in the interior of the supporting base, a driving rod is connected to the output end of the driving motor, the driving rod passes through the bottom end of the mixing drum and extends to the interior of the mixing drum, and a stirring paddle for stirring is installed on the driving rod;

[0010] An agitation assembly is arranged inside the mixing cylinder, and the agitation assembly includes a separation disk, and the separation disk divides the internal space of the mixing cylinder into two spaces. Grinding balls are placed on the upper surface of the separation disk. A filter cover is arranged at the top of the mixing cylinder, which is located directly above the separation disk. The top of the filter cover is connected to the filter disk. A ventilation pipe is also embedded in the mixing cylinder, and the ventilation pipe is between the filter cover and the grinding balls. The ventilation pipe introduces nitrogen into the interior of the mixing cylinder.

[0011] Preferably, the driving rod is passed through two groups of U-shaped tubes and circulation tubes, and the ends of the two groups of circulation tubes are connected to circulation pumps. The circulation pump allows the raw materials and the mixed liquid to enter the interior of the U-shaped tube from one group of circulation tubes, and then be transported to the interior of the mixing barrel. The raw materials and the mixed liquid in the mixing barrel are then transported to the interior of the circulation tube from the other group of U-shaped tubes, and circulated in sequence.

[0012] Preferably, the mixing cylinder is provided with an infiltration groove, the mixing cylinder and the circulation cylinder are connected through the infiltration groove, and an obstruction plate is also provided inside the circulation cylinder, the obstruction plate surrounds the inner wall of the circulation cylinder, and both side surfaces of the obstruction plate are arc-shaped.

[0013] Preferably, the bottom end of the filter cover is covered with a rear separation net, and the separation net is used to filter particulate matter. The filter cover is provided with four layers inside and outside, and the specifications increase from the inside to the outside, and gaps are left between each layer for the mixed liquid to pass through.

[0014] Preferably, the filter cover is configured as a truncated cone structure with a small diameter at the top and a large diameter at the bottom, and the mixed liquid penetrates through the separation net to the bottom of the filter cover until it overflows from the interior of the mixing cylinder through the filter cover and the filter disc.

[0015] Preferably, the top of the filter cover covers the rear filter disc, the filter disc is provided with a through hole for supplying the mixed liquid, and the outer edge of the filter disc covers the top of the mixing cylinder to cover the top of the mixing cylinder.

[0016] Preferably, a suspension removal component is embedded in the center of the filter disc, and the suspension removal component includes a floating block, and a suction tube is connected to the bottom end of the floating block, and the suction tube is embedded in the interior of the filter cover.

[0017] Preferably, a circulation groove is provided at the top end of the driving rod, and a water outlet hole is also provided on the driving rod, and the water outlet hole is communicated with the interior of the circulation groove.

[0018] Preferably, a suction groove is provided at the top of the floating block, a suspension groove is provided at the bottom of the floating block, the driving rod is embedded in the interior of the mixing cylinder until it passes through the separation net and is embedded in the interior of the filter cover, and is connected to the suction tube, and the suction tube is placed inside the circulation groove.

[0019] A method for preparing an anti-corrosion and wear-resistant rubber material, wherein the raw material and the mixed liquid thereof are connected through a pipeline and a circulation pump, and are introduced into a U-shaped tube from the circulation pipe, and then transported into a mixing drum, and when a driving motor drives a driving rod to rotate, a stirring paddle is driven to stir the mixed liquid, and as the mixed liquid is continuously added into the mixing drum, the liquid level of the mixed liquid in the mixing drum continuously rises until it overflows;

[0020] During the mixing process, when the liquid level of the mixed liquid rises, the mixed liquid permeates through the separation disk for a second separation, and the grinding balls roll with the liquid and hit the carbon black particles to accelerate the mixing of the carbon black and the liquid; part of the mixed liquid permeates into the circulation cylinder through the permeation groove, hits the barrier plate, and then flows into the mixing cylinder again through the permeation groove to realize the exchange of the mixed liquid between the mixing cylinder and the circulation cylinder, and nitrogen is continuously introduced through the ventilation pipe during the mixing process, and the nitrogen disperses the carbon black and other fillers in the rubber matrix, while preventing the rubber from being oxidized;

[0021] According to the raw material ratio, add 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of antioxidant 4010NA, 1-2 parts of antioxidant RD, and 10-15 parts of naphthenic oil and continue mixing for 2-3 minutes under stirring with a stirring paddle;

[0022] Add carbon black N330 and white carbon black in batches, one third of the total amount of carbon black and white carbon black each time, and mix for 2-3 minutes after each addition;

[0023] Add 8-12 parts of hydroxyl-terminated polybutadiene liquid rubber and mix for 3-4 minutes;

[0024] Vulcanization: After the mixed rubber is processed in an open mill, 1.5-2.5 parts of sulfur, 1-2 parts of accelerator DM, and 0.5-1 part of accelerator TMTD are added, and vulcanization is carried out in a flat vulcanizer at a temperature of 150℃-165℃, a pressure of 10-15MPa, and a time of 10-20 minutes.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention provides an anti-corrosion and wear-resistant rubber material and a preparation method thereof, which significantly improves the wear resistance by optimizing the raw material formula, increasing the proportion of carbon black and reasonably matching other ingredients; the addition of terminal hydroxyl polybutadiene liquid rubber balances the elasticity and flexibility; the continuous introduction of nitrogen during the mixing stage and the special internal mixer design effectively prevent rubber oxidation and avoid carbon black agglomeration, thereby improving the uniformity and performance stability of the material, so that the rubber material has a longer service life and better stability in high wear and corrosive environments, can adapt to the needs of different scenarios, and overcomes the shortcomings of traditional materials that sacrifice elasticity and flexibility when increasing wear resistance. In addition, impurities can be effectively separated through structures such as filter covers, and the reasonable position setting of the ventilation pipe ensures uniform nitrogen introduction, which overcomes the shortcomings of traditional materials that sacrifice elasticity and flexibility when increasing wear resistance, while reducing equipment maintenance costs and replacement frequency, and has high cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2It is a schematic diagram of the cross-sectional structure of the circulation drum of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the driving motor and the circulation pipe of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the driving rod and the stirring paddle of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the filter cover and the filter plate of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the filter cover and the separation net of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the floating block and the suction tank of the present invention;

[0034] Figure 8 It is a schematic diagram of the cross-sectional structure of the mixing barrel of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the suction tube and the filter cover of the present invention;

[0036] Fig.10 It is a schematic diagram of the structure of the circulation groove and the water outlet hole of the present invention.

[0037] In the figure: 11, support base; 12, mixing cylinder; 13, circulation cylinder; 14, fixed frame; 2, separation component; 21, drive motor; 22, drive rod; 23, stirring paddle; 24, U-shaped tube; 25, circulation tube; 3, agitation component; 31, separation plate; 32, grinding ball; 33, filter cover; 34, filter plate; 35, penetration groove; 36, obstruction plate; 37, ventilation pipe; 38, separation net; 4, suspension removal component; 41, floating block; 42, suction groove; 43, suspension groove; 44, suction tube; 45, circulation groove; 46, water outlet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0040] Embodiment 1:

[0041] A corrosion-resistant and wear-resistant rubber material, comprising 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 45 parts of carbon black N33, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil mixing cylinder, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 8 parts of hydroxyl-terminated polybutadiene (HTPB) liquid rubber;

[0042] Nitrogen is continuously introduced during the mixing stage of the rubber materials. The mixing process of the rubber materials includes sequentially putting nitrile rubber and chloroprene rubber into an internal mixer with a mixing barrel temperature of 125°C and a rotation speed of 50 r / min for mixing for 2.5 minutes. Carbon black and white carbon black are added in three times, one third of the total amount each time, and mixed for 2.5 minutes after addition. hydroxy-terminated polybutadiene liquid rubber is added and mixed for 3.5 minutes, with nitrogen introduced throughout the process.

[0043] Embodiment 2:

[0044] A corrosion-resistant and wear-resistant rubber material, comprising 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 50 parts of carbon black N330, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 10 parts of hydroxyl-terminated polybutadiene (HTPB) liquid rubber;

[0045] Nitrogen is continuously introduced during the mixing stage of the rubber materials. The mixing process of the rubber materials includes sequentially putting nitrile rubber and chloroprene rubber into an internal mixer with a temperature cycle of 130°C and a rotation speed of 50 r / min for mixing for 2.5 minutes. Carbon black and white carbon black are added in three times, one third of the total amount each time, and mixing is carried out for 2.5 minutes after addition. hydroxy-terminated polybutadiene liquid rubber is added and mixed for 3.5 minutes, with nitrogen introduced throughout the process.

[0046] Embodiment 3:

[0047] A corrosion-resistant and wear-resistant rubber material, comprising 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 55 parts of carbon black N330, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 12 parts of hydroxyl-terminated polybutadiene (HTPB) liquid rubber mixing cylinder;

[0048] Nitrogen is continuously introduced during the mixing stage of the rubber materials. The mixing process of the rubber materials includes sequentially putting nitrile rubber and chloroprene rubber into an internal mixer with a temperature cycle of 135°C and a rotation speed of 55 r / min for mixing for 3 minutes. Carbon black and white carbon black are added in three times, one third of the total amount each time, and mixing for 3 minutes after adding. hydroxy-terminated polybutadiene liquid rubber is added and mixed for 4 minutes, with nitrogen introduced throughout the process.

[0049] Embodiment 4:

[0050] A corrosion-resistant and wear-resistant rubber material comprises 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 50 parts of carbon black N330, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil, 4 parts of zinc oxide and 1.5 parts of stearic acid.

[0051] Put nitrile rubber and chloroprene rubber into an internal mixer with a temperature of 130°C and a rotation speed of 50r / min. After mixing for 2.5 minutes, add zinc oxide, stearic acid, antioxidant 4010NA, antioxidant RD, and cyclohexane oil and mix for 2.5 minutes. Then add carbon black N330 and white carbon black in batches, adding one third of the total amount of carbon black and white carbon black each time, and mix for 2.5 minutes after each addition.

[0052] The following is a table of experimental data and property change analysis of four examples: Experiment 1 corresponds to Example 1, Experiment 2 corresponds to Example 2, Experiment 3 corresponds to Example 3, and Experiment 4 corresponds to Example 4:

[0053]

[0054]

[0055] The rubber material of the present invention comprises nitrile rubber, chloroprene rubber, carbon black N330 in a specific proportion, white carbon black, sulfur, accelerator, antioxidant, cyclohexane oil, zinc oxide, stearic acid and hydroxy-terminated polybutadiene (HTPB) liquid rubber. By optimizing the proportion of each component, especially increasing the proportion of carbon black, the wear resistance of the rubber material is significantly improved. The addition of hydroxy-terminated polybutadiene liquid rubber balances the elasticity and flexibility of the rubber material, so that it maintains good performance while improving the corrosion resistance and wear resistance. Nitrogen is continuously introduced during the mixing stage of the rubber material to effectively prevent oxidation of the rubber material and ensure stable performance. The special design of the internal mixer first stirs the carbon black to put it in a suspended state, and then introduces nitrogen to blow bubbles to accelerate mixing, promote the full mixing of carbon black and liquid, avoid the problem of carbon black agglomeration, and improve the uniformity of the material;

[0056] Compared with traditional rubber materials, it has a longer service life and better stability in high wear and corrosion environments, can adapt to different usage scenarios and needs, overcomes the shortcomings of traditional materials that sacrifice elasticity and flexibility when increasing wear resistance, and due to its excellent performance, reduces the maintenance cost and replacement frequency of equipment, and has high cost-effectiveness. The rubber material of the present invention was tested through four embodiments, including variable conditions such as different contents of terminal hydroxyl polybutadiene liquid rubber and whether nitrogen is introduced. The experimental results show that the rubber material of the present invention shows obvious advantages in hardness, tensile strength, elongation at break, wear resistance, corrosion resistance, elasticity and flexibility.

[0057] Embodiment 5:

[0058] Combination Figure 1-Figure 10 :

[0059] With the development of technology and the continuous improvement of the performance requirements for rubber materials, in certain specific application scenarios, it is necessary to increase the proportion of carbon black in rubber materials to enhance their corrosion resistance and wear resistance. However, when the proportion of carbon black increases, the phenomenon of carbon black agglomeration becomes more obvious during the mixing of raw materials and mixed liquid. Traditional mixing equipment and processes are often difficult to effectively avoid the problem of carbon black agglomeration when dealing with rubber materials with a high proportion of carbon black. Carbon black agglomeration not only causes the inhomogeneity of rubber materials, reduces the stability and consistency of their performance, but also affects the processing performance of rubber materials, increasing production difficulty and cost.

[0060] In order to solve this problem, a new type of device is urgently needed to improve the agglomeration phenomenon when mixing high-proportion carbon black rubber materials, so as to improve the performance and quality of rubber materials and meet the market demand for high-performance rubber materials. The specific operation is as follows:

[0061] The internal mixer for preparing rubber materials includes a support base 11, a mixing drum 12 is installed on the top of the support base 11, a circulation drum 13 is arranged on the top of the mixing drum 12, the mixing drum 12 is divided into an upper and lower section, the upper section is wrapped by the circulation drum 13, and the outer surface of the lower section is fixedly connected to a fixing frame 14, and a separation component 2 is also arranged on the fixing frame 14, and the separation component 2 includes a U-shaped tube 24, the U-shaped tube 24 is embedded in the lower section of the mixing drum 12, and a circulation tube 25 is embedded in the interior of the U-shaped tube 24, and a driving motor 21 is also embedded in the interior of the support base 11, and the output of the driving motor 21 The driving rod 22 is connected to the end, and the driving rod 22 passes through the bottom end of the mixing drum 12 and extends to the inside of the mixing drum 12. A stirring paddle 23 for stirring is installed on the driving rod 22. The driving rod 22 passes through two groups of U-shaped tubes 24 and circulation tubes 25. The ends of the two groups of circulation tubes 25 are connected to circulation pumps. The raw materials and the mixed liquid thereof enter the inside of the U-shaped tube 24 from one group of circulation tubes 25 through the circulation pump, and then are transported to the inside of the mixing drum 12. Then, the raw materials and the mixed liquid inside the mixing drum 12 are transported to the inside of the circulation tube 25 from the other group of U-shaped tubes 24, and circulate in sequence.

[0062] When the raw material and the mixed liquid are mixed, they are first connected through a pipeline and a circulation pump, and the pipeline transports the mixed liquid to the inside of the circulation pump, and then the mixed liquid is transported to the inside of the mixing drum 12 through the circulation pipe 25 and the U-shaped pipe 24. Since the mixing drum 12 is provided with a stirring paddle 23, the driving motor 21 drives the driving rod 22 to rotate, and then drives the stirring paddle 23 to rotate. When the stirring paddle 23 rotates, it drives the mixed liquid inside to stir. As the mixed liquid is continuously added to the inside of the mixing drum 12, the liquid level of the mixed liquid inside the mixing drum 12 continues to rise, and then the liquid level overflows until it overflows from the top of the mixing drum 12;

[0063] In order to improve the internal mixing degree, an agitation component 3 is provided to work in conjunction with the separation component 2 to provide a good mixing effect. The specific operation is as follows:

[0064] The interior of the mixing barrel 12 is provided with an agitation assembly 3, and the agitation assembly 3 includes a separation disk 31. The separation disk 31 divides the internal space of the mixing barrel 12 into two spaces. Grinding balls 32 are placed on the upper surface of the separation disk 31. The top of the mixing barrel 12 is located directly above the separation disk 31 and is provided with a filter cover 33. The bottom end of the filter cover 33 covers a rear separation net 38. The separation net 38 is used to filter particulate matter. The filter cover 33 is provided with four layers inside and outside. The specifications increase from the inside to the outside. A gap is left between each layer for the mixed liquid to pass through. The filter cover 33 is set to a truncated cone structure with a small diameter at the top and a large diameter at the bottom. A felt for filtering is provided at the gap to absorb impurities. The mixed liquid penetrates to the bottom end of the filter cover 33 through the separation net 38 until it passes through the filter cover 33 and filter disc 34 overflow the interior of the mixing barrel 12, the top of the filter cover 33 covers the rear filter disc 34, the filter disc 34 is provided with a through hole for supplying the mixed liquid, the outer edge of the filter disc 34 covers the top of the mixing barrel 12, and is used to cover the top of the mixing barrel 12, the top of the filter cover 33 is connected to the filter disc 34, and a vent pipe 37 is also embedded in the interior of the mixing barrel 12, the vent pipe 37 is between the filter cover 33 and the grinding ball 32, and the vent pipe 37 introduces nitrogen into the interior of the mixing barrel 12, an infiltration groove 35 is provided on the mixing barrel 12, the mixing barrel 12 and the circulation barrel 13 are connected through the infiltration groove 35, and an obstruction plate 36 is also provided inside the circulation barrel 13, the obstruction plate 36 surrounds the inner wall of the circulation barrel 13, and both sides of the obstruction plate 36 are arc-shaped.

[0065] When the driving motor 21 drives the stirring paddle 23 to rotate, the mixed liquid is mixed to ensure that the carbon black and the liquid are fully mixed. As the liquid level continues to rise, the mixed liquid penetrates through the separation disk 31. At this time, the separation is performed for the second time through the separation disk 31. The particles in the liquid can be separated through the separation disk 31. Along with the mixed liquid, some small carbon black particles are also included. In order to better dissolve the carbon black particles into the liquid, when the stirring paddle 23 rotates, the liquid inside the mixing barrel 12 is driven to rotate. At this time, the grinding balls 32 also roll with the liquid, and will hit the carbon black particles during the rolling, thereby accelerating the mixing of the carbon black and the liquid.

[0066] When the mixed liquid is stirred and mixed, part of the liquid in the mixing cylinder 12 will penetrate into the inside of the circulation cylinder 13 through the penetration groove 35. The circulation cylinder 13 is provided with an obstruction plate 36. When the mixed liquid circulates in the circulation cylinder 13, it will hit the obstruction plate 36. After the mixed liquid enters the circulation cylinder 13, during the circulation process, the liquid in the circulation cylinder 13 will flow into the mixing cylinder 12 again through the penetration groove 35. In this way, the mixed liquid realizes the exchange between the mixing cylinder 12 and the circulation cylinder 13. During the exchange process, some particulate impurities can also be retained in the circulation cylinder 13, so that the circulation cylinder 13 also plays a role in isolating impurities.

[0067] In addition, during the mixing and preparation of rubber materials, oxygen is one of the main factors that cause rubber aging. For this reason, nitrogen is introduced into the interior of the mixing barrel 12 through the vent pipe 37. The introduction of nitrogen can effectively remove oxygen from the mixing system and prevent the rubber from being oxidized, thereby maintaining the stability of the performance of the rubber material, especially for rubber materials containing a high proportion of carbon black. The carbon black itself easily absorbs oxygen and aggravates the oxidation process of the rubber. The introduction of nitrogen can reduce the risk of such oxidation and extend the service life of the rubber material;

[0068] Secondly, the introduction of nitrogen can generate a certain amount of airflow and stirring in the mixing system, which helps to disperse fillers such as carbon black in the rubber matrix. For rubber materials with a high proportion of carbon black, the dispersion of carbon black can improve the uniformity of the rubber material and thus improve its performance. Finally, during the mixing process, the presence of nitrogen can allow the rubber material and various additives to be mixed in a relatively stable atmosphere, reducing interference from external factors. This helps to improve the mixing effect and uniformity, and ensure the performance consistency of the rubber material.

[0069] A suspension removal assembly 4 is embedded in the center of the filter disc 34. The suspension removal assembly 4 includes a floating block 41. The bottom end of the floating block 41 is connected to a suction pipe 44. The suction pipe 44 is embedded in the interior of the filter cover 33. A circulation groove 45 is provided at the top of the driving rod 22. A water outlet hole 46 is also provided on the driving rod 22. The water outlet hole 46 is connected to the interior of the circulation groove 45. A suction groove 42 is provided at the top of the floating block 41. A suspension groove 43 is provided at the bottom end of the floating block 41. The driving rod 22 is embedded in the interior of the mixing barrel 12 until it passes through the separation net 38 and is embedded in the interior of the filter cover 33, and is connected to the suction pipe 44. The suction pipe 44 Placed inside the circulation groove 45, when the liquid inside the mixing cylinder 12 is in the process of circulation, the floating block 41 will be suspended in the liquid. The bottom end of the floating block 41 is light and floats on the water surface. When the surface of the liquid contains some floating objects, these floating objects flow through the suspension groove 43 on the floating block 41 to the inside of the suction pipe 44, and finally flow through the suction pipe 44 to the inside of the circulation groove 45. Then, as the driving rod 22 rotates, the liquid is discharged from the water outlet 46, thereby realizing the circulation of the liquid. In this way, the liquid entering the mixing cylinder 12 can be circulated again until it overflows and is discharged from the inside of the mixing cylinder 12.

[0070] A method for preparing an anti-corrosion and wear-resistant rubber material, wherein the raw material and the mixed liquid thereof are connected through a pipeline and a circulation pump, and enter the inside of a U-shaped tube 24 from a circulation tube 25, and then are transported to the inside of a mixing drum 12, and when a driving motor 21 drives a driving rod 22 to rotate, a stirring paddle 23 is driven to stir the mixed liquid, and as the mixed liquid is continuously added to the inside of the mixing drum 12, the liquid level of the mixed liquid in the mixing drum 12 continuously rises until it overflows;

[0071] During the mixing process, when the liquid level of the mixed liquid rises, the mixed liquid permeates through the separation disk 31 for a second separation, and the grinding balls 32 roll with the liquid and hit the carbon black particles to accelerate the mixing of the carbon black and the liquid; part of the mixed liquid permeates into the circulation cylinder 13 through the permeation groove 35, hits the obstruction plate 36, and then flows into the mixing cylinder 12 again through the permeation groove 35 to realize the exchange of the mixed liquid between the mixing cylinder 12 and the circulation cylinder 13, and nitrogen is continuously introduced through the ventilation pipe 37 during the mixing process, and the nitrogen disperses the fillers such as carbon black in the rubber matrix and prevents the rubber from being oxidized;

[0072] According to the raw material ratio, under stirring with a stirring paddle 23, add 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of antioxidant 4010NA, 1-2 parts of antioxidant RD, and 10-15 parts of naphthenic oil and continue mixing for 2-3 minutes;

[0073] Add carbon black N330 and white carbon black in batches, one third of the total amount of carbon black and white carbon black each time, and mix for 2-3 minutes after each addition;

[0074] Add 8-12 parts of hydroxyl-terminated polybutadiene liquid rubber and mix for 3-4 minutes;

[0075] Vulcanization: After the mixed rubber is processed in an open mill, 1.5-2.5 parts of sulfur, 1-2 parts of accelerator DM, and 0.5-1 part of accelerator TMTD are added, and vulcanization is carried out in a flat vulcanizer at a temperature of 150℃-165℃, a pressure of 10-15MPa, and a time of 10-20 minutes.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant and wear-resistant rubber material, characterized in that: Contains 40 parts of nitrile rubber, 25 parts of chloroprene rubber, 55 parts of carbon black N3345-5, 15 parts of white carbon black, 2 parts of sulfur, 1.5 parts of accelerator DM, 0.8 parts of accelerator TMTD, 1.5 parts of antioxidant 4010NA, 1.5 parts of antioxidant RD, 12 parts of cyclohexane oil, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 10 parts of hydroxyl-terminated polybutadiene (HTPB) liquid rubber; Nitrogen is continuously introduced into the rubber material mixing stage. The rubber material mixing process includes sequentially putting nitrile rubber and chloroprene rubber into the internal mixer, mixing for 2-3 minutes at a temperature of 120°C in the mixing drum and 135°C in the circulating drum and a speed of 40-55r / min, then adding 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of antioxidant 4010NA, 1-2 parts of antioxidant RD, and 10-15 parts of cyclohexane oil and continuing to mix for 2-3 minutes, and then adding carbon black N330 and white carbon black in batches, with the total amount of carbon black and white carbon black added each time being 10% of the total amount of carbon black and white carbon black added each time. After each addition, knead for 2-3 minutes, then add 8-12 parts of hydroxyl-terminated polybutadiene liquid rubber and knead for 3-4 minutes, and nitrogen is introduced during the whole kneading process; the vulcanization stage includes adding 1.5-2.5 parts of sulfur, 1-2 parts of accelerator DM, and 0.5-1 part of accelerator TMTD to the kneaded rubber after processing on an open mill; The internal mixer for preparing rubber materials comprises a support base (11), a mixing drum (12) is installed at the top of the support base (11), a circulation drum (13) is arranged at the top of the mixing drum (12), the mixing drum (12) is divided into two sections, the upper section is wrapped by the circulation drum (13), and the outer surface of the lower section is fixedly connected to a fixing frame (14), and a separation component (2) is also arranged on the fixing frame (14), and the separation component (2) comprises a U-shaped tube (24), the U-shaped tube (24) is embedded in the lower section of the mixing drum (12), and a circulation tube (25) is embedded in the interior of the U-shaped tube (24), and a driving motor (21) is also embedded in the interior of the support base (11), and a driving rod (22) is connected to the output end of the driving motor (21), and the driving rod (22) passes through the bottom end of the mixing drum (12) and extends to the interior of the mixing drum (12), and a stirring paddle (23) for stirring is installed on the driving rod (22); An agitation assembly (3) is arranged inside the mixing cylinder (12), and the agitation assembly (3) comprises a separation disk (31). The separation disk (31) divides the internal space of the mixing cylinder (12) into two spaces. Grinding balls (32) are placed on the upper surface of the separation disk (31). A filter cover (33) is arranged at the top of the mixing cylinder (12) directly above the separation disk (31). The top of the filter cover (33) is connected to the filter disk (34). A ventilation pipe (37) is also embedded inside the mixing cylinder (12). The ventilation pipe (37) is located between the filter cover (33) and the grinding balls (32). The ventilation pipe (37) introduces nitrogen into the interior of the mixing cylinder (12).

2. The anti-corrosion and wear-resistant rubber material according to claim 1, characterized in that: The driving rod (22) passes through two groups of U-shaped tubes (24) and circulation tubes (25). The ends of the two groups of circulation tubes (25) are connected to circulation pumps. The raw materials and the mixed liquid thereof enter the interior of the U-shaped tube (24) from one group of circulation tubes (25) through the circulation pump, and are then transported to the interior of the mixing drum (12). The raw materials and the mixed liquid inside the mixing drum (12) are then transported to the interior of the circulation tubes (25) from the other group of U-shaped tubes (24), and the circulation is carried out in sequence.

3. The anti-corrosion and wear-resistant rubber material according to claim 1, characterized in that: The mixing cylinder (12) is provided with a permeation groove (35), and the mixing cylinder (12) and the circulation cylinder (13) are connected via the permeation groove (35). An obstruction plate (36) is also provided inside the circulation cylinder (13), and the obstruction plate (36) surrounds the inner wall of the circulation cylinder (13), and both side surfaces of the obstruction plate (36) are arc-shaped.

4. The anti-corrosion and wear-resistant rubber material according to claim 1, characterized in that: The bottom end of the filter cover (33) is covered with a rear separation net (38), and the separation net (38) is used to filter particulate matter. The filter cover (33) is provided with four layers inside and outside, and the specifications increase from the inside to the outside, and a gap is left between each layer for the mixed liquid to pass through.

5. The anti-corrosion and wear-resistant rubber material according to claim 4, characterized in that: The filter cover (33) is configured as a truncated cone structure with a small diameter at the top and a large diameter at the bottom. The mixed liquid penetrates through the separation net (38) to the bottom of the filter cover (33) until it overflows from the interior of the mixing cylinder (12) through the filter cover (33) and the filter disc (34).

6. The anti-corrosion and wear-resistant rubber material according to claim 5, characterized in that: The top end of the filter cover (33) covers the rear filter disc (34), and the filter disc (34) is provided with a through hole for supplying the mixed liquid. The outer edge of the filter disc (34) covers the top end of the mixing cylinder (12) for covering the top end of the mixing cylinder (12).

7. The anti-corrosion and wear-resistant rubber material according to claim 1, characterized in that: A suspension removal component (4) is embedded in the center of the filter disc (34), and the suspension removal component (4) comprises a floating block (41). The bottom end of the floating block (41) is connected to a suction pipe (44), and the suction pipe (44) is embedded in the interior of the filter cover (33).

8. The anti-corrosion and wear-resistant rubber material according to claim 7, characterized in that: A circulation groove (45) is provided at the top end of the driving rod (22), and a water outlet hole (46) is also provided on the driving rod (22), wherein the water outlet hole (46) is communicated with the inside of the circulation groove (45).

9. The anti-corrosion and wear-resistant rubber material according to claim 8, characterized in that: The top end of the floating block (41) is provided with a suction groove (42), the bottom end of the floating block (41) is provided with a suspension groove (43), the driving rod (22) is embedded in the interior of the mixing cylinder (12) until it passes through the separation net (38) and is embedded in the interior of the filter cover (33), and is connected to the suction pipe (44), and the suction pipe (44) is placed in the interior of the circulation groove (45).

10. A method for preparing an anticorrosive and wear-resistant rubber material, characterized in that: The raw materials and the mixed liquid are connected through the pipeline and the circulation pump, and enter the U-shaped tube (24) from the circulation tube (25), and then transported to the mixing drum (12). When the driving motor (21) drives the driving rod (22) to rotate, the stirring paddle (23) is driven to stir the mixed liquid. As the mixed liquid is continuously added to the mixing drum (12), the liquid level of the mixed liquid in the mixing drum (12) continuously rises until it overflows. During the mixing process, when the liquid level of the mixed liquid rises, the mixed liquid permeates through the separation disk (31) for a second separation, and the grinding balls (32) roll with the liquid and hit the carbon black particles to accelerate the mixing of the carbon black and the liquid; Part of the mixed liquid penetrates into the circulation cylinder (13) through the penetration groove (35), hits the blocking plate (36), and then flows into the mixing cylinder (12) again through the penetration groove (35) to achieve the exchange of the mixed liquid between the mixing cylinder (12) and the circulation cylinder (13). During the mixing process, nitrogen is continuously introduced through the ventilation pipe (37). The nitrogen disperses fillers such as carbon black in the rubber matrix and prevents the rubber from being oxidized. According to the raw material ratio, under stirring with a stirring blade (23), 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of antioxidant 4010NA, 1-2 parts of antioxidant RD, and 10-15 parts of naphthenic oil are added and kneading is continued for 2-3 minutes; Add carbon black N330 and white carbon black in batches, one third of the total amount of carbon black and white carbon black each time, and mix for 2-3 minutes after each addition; Add 8-12 parts of hydroxyl-terminated polybutadiene liquid rubber and mix for 3-4 minutes; Vulcanization: After the mixed rubber is processed in an open mill, 1.5-2.5 parts of sulfur, 1-2 parts of accelerator DM, and 0.5-1 part of accelerator TMTD are added, and vulcanization is carried out in a flat vulcanizer at a temperature of 150℃-165℃, a pressure of 10-15MPa, and a time of 10-20 minutes.

Images