Wear-resistant rubber material for dredging pipe and preparation method of wear-resistant rubber material

Abstract

The invention belongs to the technical field of rubber materials, and particularly relates to a wear-resistant rubber material for a dredging pipe and a preparation method of the wear-resistant rubber material. The wear-resistant rubber material is prepared from modified butadiene rubber, isoprene rubber, a silicon modified mixed material, carbon black, white carbon black, indirect method zinc oxide, stearic acid, an anti-aging agent, an accelerant and sulfur according to a certain proportion, stress resistance, strength, hardness and the like are remarkably improved, and relatively good wear resistance, tear resistance, erosion resistance, aging resistance and the like are comprehensively brought; according to the present invention, the raw material components and the process achieve the synergistic effect, the strong rubber material interface effect and the internal structure are formed mainly through the modified butadiene rubber, the silicon modified mixed material and the pre-treatment with the white carbon black, the wear resistance is significantly improved, the excellent mechanical property can be maintained, and the working efficiency can be effectively improved; therefore, the sizing material is suitable for being used as a dredging pipe manufacturing material.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber materials, and in particular relates to a wear-resistant rubber material for a dredging pipe and a preparation method thereof. Background Art

[0002] Dredging pipe is a pipe made of ultra-high molecular weight polyethylene, which has excellent properties such as wear resistance and impact resistance. It is mainly used for low-pressure transportation, including mud transportation, seawater gravel transportation, etc. The application environment is mainly in relatively rugged mud or ocean. The dredging pipe body is subjected to severe abrasion damage, so the dredging pipe needs to have extremely excellent wear resistance and impact resistance.

[0003] With the development of dredging technology and the requirements for reducing dredging costs and improving dredging efficiency, my country has devoted itself to the research and development of dredging equipment and has achieved remarkable results, with corresponding breakthroughs in dredging power, dredging technology and working environment. This is because metal, non-metal and other materials have been tried in terms of pipeline materials. Among them, metal materials are more expensive and difficult to process, while non-metal materials include PVC pipes, rubber, polyethylene, resins, polymers and other components with good wear resistance, but they still fail to meet the requirements in terms of wear resistance under relatively severe environments.

[0004] Therefore, in order to further improve the wear resistance of dredging pipes, it is of great significance to develop a raw material suitable for dredging pipes with high bonding strength, excellent wear resistance and impact resistance. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide a wear-resistant rubber material for dredging pipes and a preparation method thereof.

[0006] The technical contents of the present invention are as follows: The present invention provides a wear-resistant rubber material for dredging pipes, wherein the wear-resistant rubber material comprises modified butadiene rubber, isoprene rubber, silicon-modified mixed material, carbon black, white carbon black, indirect zinc oxide, stearic acid, antioxidant, accelerator and sulfur; In terms of weight, the wear-resistant rubber comprises 50-80 parts of modified butadiene rubber, 20-50 parts of isoprene rubber, 10-30 parts of silicon-modified mixture, 40-50 parts of carbon black, 15-20 parts of white carbon black, 5-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-3 parts of antioxidant, 3-6 parts of accelerator and 1-2 parts of sulfur; The modified butadiene rubber is obtained by modifying butadiene rubber with zinc acrylate and nano-molybdenum disulfide. Ionic bonds and coordination bonds are formed during the cross-linking reaction, which helps to increase the crystallinity and improve the mechanical properties of the modified butadiene rubber. The weight ratio of zinc acrylate, nano disulfide and butadiene rubber is (1-5): (8-15): (80-100); The silicon-modified mixture is obtained by adding water-containing magnesium-rich silicate clay mineral and silane coupling agent to the molten materials of coumarone resin and styrene-butadiene rubber; The carbon black includes one or more of SAF, N220 and N330; The polymerization degree of the isoprene rubber is 250-300, preferably 260-280; The zinc oxide is indirect zinc oxide with a purity of 99.5-99.9%; The antioxidant includes one or more of antioxidant RD, antioxidant MB, antioxidant 4020, antioxidant 4010Na, and antioxidant BLE, preferably a mixture of antioxidant MB and 4010Na; The accelerator includes one or more of a thiuram accelerator, a sulfenamide accelerator, a thiazole accelerator and a guanidine accelerator; The thiuram accelerator includes one or more of tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, and bis(1,5-pentylene)thiuram tetrasulfide; The sulfenamide accelerator includes one or more of dibenzothiazole disulfide, N-tert-butyl-2-benzothiazole sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, and N-oxydiethylene-2-benzothiazole sulfenamide; The thiazole accelerator includes one or more of 2,2'-dithiodibenzothiazole, 2-thiobenzothiazole, and 2-thiolbenzothiazole zinc salt; The guanidine accelerator includes one or more of di-o-tolylguanidine, o-tolylbiguanide, and phenformin; Preferably, it is a mixture of N-cyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl-2-benzothiazole sulfenamide 2, and 2'-dithiodibenzothiazole, with a ratio of (1-2): (1-1.5):1.

[0007] The present invention also provides a method for preparing a wear-resistant rubber material for a dredging pipe, comprising the following steps: 1) Preparation of modified butadiene rubber: In a nitrogen atmosphere, zinc acrylate and nano-molybdenum disulfide are added to molten butadiene rubber for sufficient reaction to obtain modified butadiene rubber. Ionic bonds and coordination bonds are formed during the cross-linking reaction, which helps to improve the crystallinity and mechanical properties of the modified butadiene rubber. The weight ratio of the zinc acrylate, nano disulfide and butadiene rubber is (1-5): (8-15): (80-100); The particle size of the nano molybdenum disulfide is 40-60 nm; 2) Preparation of silicon-modified mixture: Coumarone resin and styrene-butadiene rubber are mixed and melted at a temperature of 100-110°C, and then a hydrous magnesium-rich silicate clay mineral and a silane coupling agent are added to react to obtain a silicon-modified mixture; The weight ratio of the coumarone resin and the styrene-butadiene rubber is (3-5): (1-2); The hydrous magnesium-rich silicate clay mineral has a polymerization degree of 15 to 25 and a hydroxy trifluoropropyl siloxane, a room temperature viscosity of 180 to 250 mpa·s, and an addition amount of 35 to 42 wt % of the coumarone resin and styrene-butadiene rubber; The silane coupling agent includes bis-[γ-(triethoxysilyl)propyl] tetrasulfide, and the amount of the silane coupling agent added is 5-10wt% of the amount of the coumarone resin and the styrene-butadiene rubber used; 3) Primary mixing: Preheat the silicon-modified mixture and white carbon black, and then add modified butadiene rubber, isoprene rubber, carbon black, zinc oxide, stearic acid and antioxidant into the internal mixer for primary mixing after uniform mixing. The mixing time of each material is 3 to 10 minutes, and the discharge temperature of the primary mixing is controlled below 120°C. In the pretreatment of silicon-modified mixture and white carbon black, since white carbon black is a particle of amorphous structure, its three-dimensional structure is connected by -O-Si-O- covalent bonds, and the arrangement between molecules is relatively close, while the silicon-modified mixture contains -Si-O- structure, and the two have the same silicon-oxygen skeleton. Pretreatment of them can have a strong interaction, produce a structural effect, and play a reinforcing role; 4) Secondary mixing: Set the temperature to 70-80°C, add accelerator and sulfur to the materials mixed once, mix and mix evenly, and then perform secondary mixing on an open mixer. The mixing time of each material is 3-10 minutes; 5) Vulcanization: Finally, set the temperature to 143°C and vulcanize for 10 to 20 minutes, with a pre-pressure of 5 to 10 MPa and a vulcanization pressure of 10 to 15 MPa. When the reaction is completed, the wear-resistant rubber compound is obtained.

[0008] The beneficial effects of the present invention are as follows: The wear-resistant rubber material for dredging pipes of the present invention is prepared by adopting modified cis-1,4-butadiene rubber, isoprene rubber, silicon-modified mixed material and other additives in a certain proportion, and has significant improvements in stress resistance, strength, hardness and the like, and comprehensively brings good wear resistance, tear resistance, erosion resistance and aging resistance and the like. It can be seen that various raw material components and processes play a synergistic role, wherein mainly due to the effects of modified cis-1,4-butadiene rubber, silicon-modified mixed material and pretreatment thereof with white carbon black, a strong rubber material interface effect and internal structure are formed, and the wear resistance is significantly improved. At the same time, excellent mechanical properties can be maintained, and work efficiency can be effectively improved. Therefore, the rubber material is suitable for being used as a manufacturing material for dredging pipes. DETAILED DESCRIPTION

[0009] The present invention is further described in detail below through specific implementation cases. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of protection of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art are all within the scope of the claims attached to this application.

[0010] Unless otherwise specified, all raw materials and reagents of the present invention are raw materials and reagents from the conventional market.

[0011] The particle size of the nano-molybdenum disulfide used in the present invention is 40-60 nm, which can be within the range but not limited; The specific surface area of ​​the hydrous magnesium-rich silicate clay mineral used is 25-40 m 2 / g.

[0012] Example 1 Preparation of wear-resistant rubber material for dredging pipe 1) Preparation of modified butadiene rubber: Under a nitrogen atmosphere, 6 parts of zinc acrylate and 15 parts of nano-molybdenum disulfide were added to 90 parts of molten butadiene rubber for full reaction to obtain modified butadiene rubber; 2) Preparation of silicon-modified mixture: 4 parts of coumarone resin and 2 parts of styrene-butadiene rubber were mixed and melted at 105° C., and then 38 wt % of hydrous magnesium-rich silicate clay mineral and 6 wt % of γ-methacryloxypropyltrimethoxysilane were added to the above mixture to react to obtain silicon-modified mixture; 3) Primary mixing: In an internal mixer, preheat 25 parts of silicon-modified mixture and 15 parts of white carbon black, mix evenly, then add 65 parts of modified butadiene rubber and mix for 3 minutes, 30 parts of isoprene rubber and mix for 4 minutes, 46 parts of carbon black SAF, 4 parts of indirect zinc oxide and mix for 3 minutes, 2 parts of stearic acid and mix for 3 minutes, 1 part of antioxidant MB and 1.5 parts of antioxidant 4010Na, mix and mix for 6 minutes, and control the discharge temperature at 120°C; 4) Secondary mixing: In an open mixer, set the temperature to 75°C, add 1 part of N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of N-tert-butyl-2-benzothiazole sulfenamide, 1 part of 2,2'-dithiodibenzothiazole and 1 part of sulfur to the first mixed material, mix well and mix for 5 minutes; 5) Vulcanization: Vulcanize on a flat vulcanizer, finally set the temperature to 143°C, vulcanize for 16 minutes, pre-pressing pressure 8MPa, vulcanization pressure 12MPa, and the wear-resistant rubber compound is obtained after the reaction is completed.

[0013] Example 2 Preparation of wear-resistant rubber material for dredging pipe 1) Preparation of modified butadiene rubber: Under nitrogen atmosphere, 5 parts of zinc acrylate and 10 parts of nano-molybdenum disulfide were added to 80 parts of molten butadiene rubber, and the mixture was fully reacted for 15 minutes to obtain modified butadiene rubber; 2) Preparation of silicon-modified mixture: 3 parts of coumarone resin and 1 part of styrene-butadiene rubber were mixed and melted at 110°C, and then 35 wt% of hydrous magnesium-rich silicate clay mineral and 5 wt% of γ-glycidyloxypropyltrimethoxysilane were added to the above mixture and reacted for 15 minutes to obtain a silicon-modified mixture; 3) Primary mixing: In an internal mixer, preheat 10 parts of silicon-modified mixture and 15 parts of white carbon black, mix evenly, then add 50 parts of modified butadiene rubber and mix for 3 minutes, 20 parts of isoprene rubber and mix for 3 minutes, 40 parts of carbon black N220, 5 parts of indirect zinc oxide and mix for 3 minutes, 1 part of stearic acid and mix for 3 minutes, 1 part of antioxidant RD and 1 part of antioxidant 4020, respectively, control the discharge temperature at 120°C, and mix and mix for 5 minutes; 4) Secondary mixing: In an open mill, set the temperature to 70°C, add 2 parts of tetraethylthiuram disulfide, 1 part of N-cyclohexyl-2-benzothiazolesulfenamide and 1 part of sulfur to the first mixed material, mix well and mix for 5 minutes; 5) Vulcanization: Finally, set the temperature to 143°C and vulcanize for 10 minutes, with a pre-compression pressure of 10 MPa and a vulcanization pressure of 15 MPa. When the reaction is completed, the wear-resistant rubber compound is obtained.

[0014] Example 3 Preparation of wear-resistant rubber material for dredging pipe 1) Preparation of modified butadiene rubber: Under nitrogen atmosphere, 8 parts of zinc acrylate and 20 parts of nano-molybdenum disulfide were added to 100 parts of molten butadiene rubber and reacted for 20 minutes to obtain modified butadiene rubber; 2) Preparation of silicon-modified mixture: 5 parts of coumarone resin and 2 parts of styrene-butadiene rubber were mixed and melted at 110°C, and then 42 wt% of hydrous magnesium-rich silicate clay mineral and 10 wt% of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane were added to the above mixture to react to obtain silicon-modified mixture; 3) Primary mixing: In an internal mixer, preheat 30 parts of silicon-modified mixture and 20 parts of white carbon black, mix evenly, then add 80 parts of modified butadiene rubber and mix for 5 minutes, 50 parts of isoprene rubber and mix for 5 minutes, 50 parts of carbon black N330, 10 parts of indirect zinc oxide and mix for 4 minutes, 5 parts of stearic acid and mix for 4 minutes, 2 parts of antioxidant MB and 1 part of antioxidant 4020, respectively, control the discharge temperature at 120°C, and mix and mix for 10 minutes; 4) Secondary mixing: In an open mill, set the temperature to 80°C, add 2 parts of dibenzothiazole disulfide, 2 parts of N-oxydiethylene-2-benzothiazole sulfenamide, 2 parts of di-o-tolylguanidine and 2 parts of sulfur to the first mixed materials, mix them evenly and mix for 6 minutes; 5) Vulcanization: Process on a flat vulcanizer, set the temperature to 143°C, mix and knead evenly for vulcanization for 20 minutes, with a pre-compression pressure of 5MPa and a vulcanization pressure of 10MPa. When the reaction is completed, the wear-resistant rubber compound is obtained.

[0015] Example 4 Preparation of wear-resistant rubber material for dredging pipe 1) Preparation of modified butadiene rubber: Under nitrogen atmosphere, 6 parts of zinc acrylate and 12 parts of nano-molybdenum disulfide were added to 85 parts of molten butadiene rubber, and the mixture was fully reacted for 12 minutes to obtain modified butadiene rubber; 2) Preparation of silicon-modified mixture: 4 parts of coumarone resin and 1.5 parts of styrene-butadiene rubber were mixed and melted at 100° C., and then 40 wt % of hydrous magnesium-rich silicate clay mineral and 4 wt % of γ-aminopropyltriethoxysilane were added to the above mixture and reacted for 12 minutes to obtain a silicon-modified mixture; 3) Primary mixing: In an internal mixer, preheat 20 parts of silicon-modified mixture and 17 parts of white carbon black, mix evenly, then add 70 parts of modified butadiene rubber and mix for 4 minutes, 25 parts of isoprene rubber and mix for 3 minutes, 42 parts of carbon black SAF, 4 parts of indirect zinc oxide and mix for 3 minutes, 2 parts of stearic acid and mix for 3 minutes, 1 part of antioxidant RD and 1 part of antioxidant BLE, control the discharge temperature at 120 degrees, and mix and mix for 8 minutes; 4) Secondary mixing: In an open mill, the temperature is controlled at 75°C, 2 parts of accelerator tetramethylthiuram disulfide, 1 part of N-cyclohexyl-2-benzothiazole sulfenamide, 1 part of phenformin and 1 part of sulfur are mixed evenly in the first mixed material and mixed for 6 minutes; 5) Vulcanization: Use a flat vulcanizer for vulcanization, set the temperature to 143°C, add the mixed ingredients and knead them evenly for vulcanization for 13 minutes, with a pre-compression pressure of 8MPa and a vulcanization pressure of 12MPa. When the reaction is completed, the wear-resistant rubber compound is obtained.

[0016] Comparative Example 1 Compared with Example 1, in the preparation of the wear-resistant rubber material of Comparative Example 1, butadiene rubber is used to replace modified butadiene rubber, and the other parts remain unchanged. The specific preparation is as follows: 1) Primary mixing: In an internal mixer, preheat 25 parts of silicon-modified mixture and 15 parts of white carbon black, mix them evenly, then add 65 parts of cis-1,4-butadiene rubber and mix them for 3 minutes, 30 parts of isoprene rubber and mix them for 4 minutes, 46 parts of carbon black SAF, 4 parts of indirect zinc oxide and mix them for 3 minutes, 2 parts of stearic acid and mix them for 3 minutes, 1 part of antioxidant MB and 1.5 parts of antioxidant 4010Na, respectively, control the discharge temperature at 120°C, and mix and mix for 6 minutes; 2) Secondary mixing: In an open mill, the temperature is controlled at 75°C, 1 part of N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of N-tert-butyl-2-benzothiazole sulfenamide, 1 part of 2,2'-dithiodibenzothiazole and 1 part of sulfur are mixed and kneaded evenly for 5 minutes. 3) Vulcanization: Use a flat vulcanizer for vulcanization, set the temperature to 143°C, mix and knead evenly for vulcanization for 16 minutes, the pre-compression pressure is 8MPa, the vulcanization pressure is 12MPa, and the wear-resistant rubber compound is obtained after the reaction is completed.

[0017] Comparative Example 2 Compared with Example 2, in the preparation of the wear-resistant rubber material of Comparative Example 2, coumarone resin and styrene-butadiene rubber are used to replace the modified silicon-modified mixture, and the other parts remain unchanged. The specific preparation is as follows: 3) Primary mixing: In an internal mixer, preheat 5 parts of coumarone resin, 5 parts of styrene-butadiene rubber and 15 parts of white carbon black, mix them evenly, then add 50 parts of modified butadiene rubber and mix them for 3 minutes, 20 parts of isoprene rubber and mix them for 3 minutes, 40 parts of carbon black N220, 5 parts of indirect zinc oxide and mix them for 3 minutes, 1 part of stearic acid and mix them for 3 minutes, 1 part of antioxidant RD and 1 part of antioxidant 4020, respectively, control the discharge temperature at 120°C, and mix and mix for 5 minutes; 4) Secondary mixing: In an open mill, set the temperature to 70°C, add 2 parts of tetraethylthiuram disulfide, 1 part of N-cyclohexyl-2-benzothiazolesulfenamide and 1 part of sulfur to the first mixed material, mix and mix evenly for 5 minutes; 5) Vulcanization: Use a flat vulcanizer for vulcanization, set the temperature to 143°C, mix and knead evenly for vulcanization for 10 minutes, the pre-pressure is 8MPa, the vulcanization pressure is 10MPa, and the wear-resistant rubber compound is obtained after the reaction is completed.

[0018] Comparative Example 3 Compared with Example 3, in the preparation of the wear-resistant rubber material of Comparative Example 3, the raw materials are directly mixed and then vulcanized, and the specific preparation is as follows: 1) Mixing: In an internal mixer, mix 30 parts of silicon-modified compound, 20 parts of white carbon black, 80 parts of modified butadiene rubber for 5 minutes, 50 parts of isoprene rubber for 5 minutes, 50 parts of carbon black N330 for 10 minutes, 10 parts of indirect zinc oxide for 4 minutes, 5 parts of stearic acid for 4 minutes, 2 parts of antioxidant MB, 1 part of antioxidant 4020, 2 parts of dibenzothiazole disulfide, 2 parts of N-oxydiethylene-2-benzothiazole sulfonamide, 2 parts of di-o-tolylguanidine and 2 parts of sulfur, mix well and mix for 6 minutes, and control the mixing discharge temperature at 120°C; 2) Vulcanization: Use a flat vulcanizer for vulcanization, set the temperature to 143°C, mix and knead evenly for vulcanization for 20 minutes, the pre-pressure is 10MPa, the vulcanization pressure is 15MPa, and the wear-resistant rubber compound is obtained after the reaction is completed.

[0019] The above wear-resistant rubber materials were subjected to relevant performance tests, including Mooney viscosity (tested under the conditions of preheating time of 1 min, rotation time of 4 min, and test temperature of 100°C according to GB / T1232.1-2000), tensile test (GB / T528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber"), tear strength test (GB / T529-2008 "Determination of tear strength of vulcanized rubber or thermoplastic rubber"), hardness test (GB / T531.1-2008 "Vulcanized rubber or thermoplastic rubber indentation hardness test method"), density test (according to GB / T533-2008 "Determination of density of vulcanized rubber or thermoplastic rubber"), Akron abrasion (GB / T1689-1998 "Determination of wear resistance of vulcanized rubber (using Akron abrasion machine)"), slurry erosion simulation test (MSH slurry erosion wear tester), ozone aging resistance (according to ISO4665-3, using the test conditions of 60°C, 4 hours of ultraviolet irradiation, 4 hours of condensation cycle, and continuous test for 7 days), etc. The results are as follows: Table 1 Performance comparison of different wear-resistant rubber compounds

[0020] As can be seen from Table 1, from the comparison between Example 1 and Comparative Example 1, it can be seen that the modified butadiene rubber has improved tensile strength, tear strength, density, and aging resistance compared to the unmodified butadiene rubber, and has significantly improved tear resistance, hardness, and abrasion resistance. This is because the preparation of the modified butadiene rubber forms ionic bonds and coordination bonds during the crosslinking reaction, which helps to improve the crystallinity and mechanical properties of the modified butadiene rubber. The addition of nano-diluent improves the dispersibility of the rubber and reduces the agglomeration phenomenon. The addition of the modified butadiene rubber also improves the stress resistance and wear resistance of the wear-resistant rubber. From the comparison between Example 2 and Comparative Example 2, it can be seen that compared with directly using coumarone resin and styrene-butadiene rubber, the silicon-modified mixture obtained by introducing the hydrous magnesium-rich silicate clay mineral and the silane coupling agent significantly improves the tensile strength, tear resistance, hardness and abrasion performance of the resin and rubber materials. It can be seen that the physical modification of the silicon-modified mixture by the hydrous magnesium-rich silicate clay mineral and the silane coupling agent enhances the connection between the resin, rubber and the hydrous magnesium-rich silicate clay mineral, and improves the mechanical structure; From the comparison between Example 3 and Comparative Example 3, it can be seen that in the pretreatment of the silicon-modified mixture and the white carbon black, since the two have the same silicon-oxygen skeleton, pretreatment thereof can have a strong interaction, produce a structural effect, and play a reinforcing role. Therefore, pretreatment of the silicon-modified mixture and the white carbon black can improve the mechanical properties of the wear-resistant rubber compound, and the process steps of performing the primary mixing and the secondary mixing can improve the dispersibility between the particles, so that the internal particles of the wear-resistant rubber compound are evenly distributed, which helps to enhance the comprehensive performance of the wear-resistant rubber compound. In summary, the wear-resistant rubber material for dredging pipes prepared by the present invention has significant improvements in stress resistance, strength, hardness, etc., and comprehensively brings better wear resistance, tear resistance, erosion resistance and aging resistance. It can be seen that the various raw material components and processes play a synergistic role, mainly due to the effects of modified butadiene rubber, silicon-modified mixture and its pretreatment with white carbon black, which form a strong rubber interface effect and internal structure, significantly improve the wear resistance, while maintaining excellent mechanical properties, which can effectively improve work efficiency. Therefore, the rubber material is suitable as a manufacturing material for dredging pipes.

Claims

1. A wear-resistant rubber material for dredging pipe, characterized in that: The components of the wear-resistant rubber material include modified butadiene rubber, isoprene rubber, silicon-modified mixed material, carbon black, white carbon black, indirect zinc oxide, stearic acid, antioxidant, accelerator and sulfur.

2. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: In terms of weight, the wear-resistant rubber comprises 50-80 parts of modified butadiene rubber, 20-50 parts of isoprene rubber, 10-30 parts of silicon-modified mixture, 40-50 parts of carbon black, 15-20 parts of white carbon black, 5-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-3 parts of antioxidant, 3-6 parts of accelerator and 1-2 parts of sulfur.

3. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: The modified butadiene rubber is obtained by modifying butadiene rubber with zinc acrylate and nano molybdenum disulfide; The weight ratio of zinc acrylate, nano disulfide and butadiene rubber is (1-5): (8-15): (80-100).

4. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: The silicon-modified mixed material is obtained by adding water-containing magnesium-rich silicate clay mineral and silane coupling agent to the molten material of coumarone resin and styrene-butadiene rubber.

5. The wear-resistant rubber material for dredging pipe according to claim 4, characterized in that: The amount of the hydrous magnesium-rich silicate clay mineral added is 10-15 wt% of the amount of coumarone resin and EPDM rubber butadiene-styrene rubber; The specific surface area of ​​the hydrous magnesium-rich silicate clay mineral is 25-40 m 2 / g.

6. The wear-resistant rubber material for dredging pipe according to claim 4, characterized in that: The silane coupling agent includes bis-[γ-(triethoxysilyl)propyl] tetrasulfide, and the amount of the silane coupling agent added is 5-10wt% of the amount of the coumarone resin and the EPDM rubber and styrene-butadiene rubber.

7. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: The carbon black includes one or more of SAF, N220 and N330.

8. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: The zinc oxide is indirect process zinc oxide, and its purity is 99.97% or above.

9. The wear-resistant rubber material for dredging pipe according to claim 1, characterized in that: The accelerator includes one or more of a thiuram accelerator, a sulfenamide accelerator, a thiazole accelerator and a guanidine accelerator.

10. A method for preparing the wear-resistant rubber material for dredging pipe according to any one of claims 1 to 9, characterized in that: The steps include: 1) Preparation of modified butadiene rubber: In a nitrogen atmosphere, zinc acrylate and nano-molybdenum disulfide are added to molten butadiene rubber for sufficient reaction to obtain modified butadiene rubber; The weight ratio of the zinc acrylate, nano disulfide and butadiene rubber is (1-5): (8-15): (80-100); The particle size of the nano molybdenum disulfide is 40-60 nm; 2) Preparation of silicon-modified mixture: Coumarone resin and styrene-butadiene rubber are mixed and melted at a temperature of 100-110°C, and then a hydrous magnesium-rich silicate clay mineral and a silane coupling agent are added to react to obtain a silicon-modified mixture; The weight ratio of the coumarone resin and the styrene-butadiene rubber is (3-5): (1-2); 3) Primary mixing: In an internal mixer, preheat the silicon-modified mixture and white carbon black, and then add modified butadiene rubber, isoprene rubber, carbon black, zinc oxide, stearic acid and antioxidant to mix them for primary mixing. The mixing time of each material is 3 to 10 minutes, and the discharge temperature of the primary mixing is controlled below 120°C. 4) Secondary mixing: In an open mixer, set the temperature to 70-80°C, add accelerator and sulfur to the materials mixed once, mix and mix evenly for secondary mixing, and the mixing time of each material is 3-10 minutes; 5) Vulcanization: Finally, set the temperature to 143°C and vulcanize on a flat vulcanizer for 10 to 20 minutes, with a pre-compression pressure of 5 to 10 MPa and a vulcanization pressure of 10 to 15 MPa. When vulcanization is completed, the wear-resistant rubber compound is obtained.

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