Energy-absorbing and shock-reducing rubber material for ocean platform and preparation method of energy-absorbing and shock-reducing rubber material

Abstract

The invention discloses an energy-absorbing and shock-reducing rubber material for an ocean platform and a preparation method of the energy-absorbing and shock-reducing rubber material. The rubber material is prepared from the following raw material components: a rubber matrix, a reinforcing filler, a vulcanizing aid, a vulcanizing agent, a silane coupling agent, a vulcanizing activator, an anti-aging agent, protective wax, tear-resistant resin and paraffin oil, the preparation method comprises the following steps: plastifying, preparing master batch, preparing final mixed rubber, and vulcanizing and molding. The natural rubber and butadiene styrene rubber blend is used as a matrix, the natural rubber endows the material with high elasticity, and the butadiene styrene rubber is used for improving the aging resistance of the material; the carbon black and the fumed silica are used as reinforcing fillers, and the dispersion state of the fumed silica is optimized through the silane coupling agent, so that the mechanical properties of the energy-absorbing and shock-reducing rubber material are effectively enhanced. The prepared energy-absorbing and shock-reducing rubber material for the ocean platform can effectively overcome the defects of natural rubber in the aspects of aging resistance, seawater corrosion resistance, oil resistance and chemical corrosion resistance, and meanwhile, the excellent high-damping characteristic and fatigue resistance of the natural rubber are reserved.

Description

Technical Field

[0001] This invention belongs to the technical field of energy-absorbing and shock-absorbing rubber materials, specifically relating to an energy-absorbing and shock-absorbing rubber material for marine platforms and its preparation method. Background Technology

[0002] The safe, stable, and long-term operation of offshore platforms (including various fixed and floating platforms such as drilling platforms, production platforms, and offshore wind power platforms) is crucial. However, these platforms operate in complex and harsh marine environments for extended periods, continuously enduring various dynamic loads such as waves, wind, ocean currents, earthquakes, and ship impacts. Therefore, the safe operation of offshore platforms largely depends on the resistance of key structural materials to complex loads—energy-absorbing and vibration-damping materials are a core component of this guarantee.

[0003] Rubber materials, with their excellent high damping characteristics, large deformation capacity, elastic recovery force, and good vibration isolation performance, have become one of the core materials for meeting the requirements of energy absorption and vibration damping functions. Currently, the main types of energy absorption and vibration damping rubber materials used in offshore platforms include: natural rubber (NR), nitrile rubber (NBR), chloroprene rubber (CR), silicone rubber (SR), polyurethane rubber (PU), ethylene propylene diene monomer (EPDM), and styrene-butadiene rubber (SBR). Among these, nitrile rubber is often used for sealing in oily environments due to its outstanding oil resistance, while chloroprene rubber is used for short-term exposure scenarios due to its excellent weather resistance. Natural rubber, with its comprehensive mechanical properties and cost advantages, has become one of the most widely used base materials, but it also has significant shortcomings. Natural rubber is obtained from the latex of the rubber tree (Hevea brasiliensis), and its basic chemical composition is cis-polyisoprene. Its regular molecular structure gives it excellent elasticity and toughness, as well as high mechanical strength. At the same time, its low cost and good processing capabilities allow for easy formulation adjustments to optimize performance, making it suitable for large-scale industrial production. However, natural rubber also has disadvantages such as insufficient resistance to aging and seawater erosion, as well as weak resistance to oil and chemical corrosion, which greatly limits its application in offshore platforms. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-absorbing and shock-absorbing rubber material for marine platforms and its preparation method, which can effectively overcome the shortcomings of natural rubber in terms of aging resistance, seawater erosion resistance, oil resistance and chemical corrosion resistance, while retaining its excellent high damping characteristics and fatigue resistance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An energy-absorbing and vibration-damping rubber material for marine platforms, wherein the raw materials of the energy-absorbing and vibration-damping rubber material comprise the following components in parts by weight: Rubber matrix 80-120 parts, reinforcing filler 48-62 parts, vulcanizing aid 1.1-2.7 parts, vulcanizing agent 2.5-4.5 parts, silane coupling agent 4-6 parts, vulcanizing activator 8-10 parts, antioxidant 1.6-8 parts, protective wax 2-5 parts, tear-resistant resin 4-6 parts, softener 6-8 parts The rubber matrix comprises a mixture of natural rubber and styrene-butadiene rubber, wherein, by weight, natural rubber comprises 70-90 parts and styrene-butadiene rubber comprises 10-30 parts; The reinforcing filler includes carbon black and fumed silica, wherein, by mass, carbon black comprises 40-50 parts and fumed silica comprises 8-12 parts. The vulcanizing activator is composed of zinc oxide and stearic acid in a mass ratio of 20:3.

[0006] Furthermore, the vulcanization aid comprises a mixture of dibenzothiazole disulfide and N-cyclohexyl-2-benzothiazole sulfenamide, wherein, by weight, 0.5-1.5 parts of dibenzothiazole disulfide and 0.6-1.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide.

[0007] Furthermore, the natural rubber in the rubber matrix is ​​RSS1 type smoked sheet rubber, and the styrene-butadiene rubber in the rubber matrix is ​​1500E type emulsion styrene-butadiene rubber.

[0008] Furthermore, the vulcanizing agent is sulfur S-80; The silane coupling agent is bis-(γ-triethoxysilylpropyl)tetrasulfide Si669; The antioxidant comprises a mixture of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and antioxidant MB (2-mercaptobenzimidazole) in a mass ratio of 2:1, wherein, by mass parts, antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) is 2-6 parts and antioxidant MB (2-mercaptobenzimidazole) is 1-3 parts; The protective wax used is RW590; The tear-resistant resin is polybutylene terephthalate resin.

[0009] Furthermore, the softener is one or more of paraffin oil, naphthenic oil, and pine tar, wherein the paraffin oil is an alkyl paraffin oil.

[0010] This invention also provides a method for preparing an energy-absorbing and shock-damping rubber material for marine platforms, comprising the following steps: S1. Raw material preparation and pretreatment: Weigh the raw materials according to the raw material composition and pretreat them. Among them, the fumed silica is dried in an oven at 80-100℃ for 2 hours to remove moisture, the vulcanizing agent is passed through an 80-mesh sieve to remove impurities, and the protective wax is crushed into particles with a particle size ≤5mm. S2. Rubber plasticizing: Put the rubber matrix into an internal mixer and plasticize it at a temperature of 50-60℃ and a speed of 60-80r / min. Stop plasticizing when the Mooney viscosity of the rubber matrix drops to 40. Discharge the plasticized rubber matrix and cool it to room temperature for later use. S3. Preparation of masterbatch: Take the plasticized rubber matrix, vulcanizing activator, reinforcing filler, silane coupling agent and softener, mix them at a temperature of 80-100℃ and a rotation speed of 60r / min, and discharge the masterbatch. S4. Preparation of final rubber: Put the masterbatch into an internal mixer, add tear-resistant resin, protective wax, antioxidant, vulcanizing aid and vulcanizing agent, mix at a temperature of 70-80℃ and a speed of 50r / min, and discharge the final rubber. S5. Vulcanization molding: Place the final compound rubber into a flat vulcanizing machine, demold it, and cool it to room temperature to obtain the energy-absorbing and shock-absorbing rubber material.

[0011] Furthermore, in step S3, during the preparation of the masterbatch, the plasticized rubber matrix is ​​first added and mixed evenly at 80-100℃ and 60r / min; after the vulcanizing activator is added to the internal mixer and mixed evenly, carbon black is added in batches for mixing, followed by the addition of fumed silica and silane coupling agent for mixing, and finally the softener is added for mixing before the masterbatch is discharged.

[0012] Furthermore, in step S4, when preparing the final rubber, the masterbatch is first preheated in a mixer at a temperature of 70-80°C; after the tear-resistant resin and protective wax are added to the mixer and mixed evenly, the antioxidant, vulcanizing aid, and vulcanizing agent are added in batches and mixed in stages, and finally the final rubber is obtained by discharging the rubber.

[0013] Furthermore, the vulcanization molding process conditions in step S5 are 145±5℃, 10±1MPa pressure, and vulcanization time of 600±100 seconds.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The energy-absorbing and shock-damping rubber material prepared in this invention has a polymer matrix composed of natural rubber and styrene-butadiene rubber. Natural rubber, with its regular molecular chain structure, can induce crystallization under dynamic deformation, contributing extremely high strength, elasticity, and fatigue resistance, making it the core energy-absorbing component. The introduction of styrene-butadiene rubber, by disrupting the excessive regularity of the molecular chain, significantly improves the material's resistance to heat, oxygen, and ozone aging, achieving a preliminary balance between elasticity and durability, while slightly sacrificing strength. In this elastic matrix, a composite filler system composed of carbon black and silica forms the reinforcing skeleton of the material. The carbon black particles, relying on their large specific surface area and active interface, form a strong physicochemical adsorption with the rubber molecular chains and construct a three-dimensional network, effectively transferring and dispersing stress, which is key to obtaining high tensile stress and wear resistance. The addition of fumed silica not only further optimizes tear resistance, but its surface silanol groups also provide reaction sites for the crucial silane coupling agent. During mixing and vulcanization, the alkoxy group at one end of the coupling agent molecule binds to the surface of the fumed silica, while the polysulfide bond at the other end participates in the rubber vulcanization crosslinking network, ultimately constructing a robust "molecular bridge" between the inorganic filler and the organic rubber. This strong interfacial coupling significantly reduces the slippage of molecular chains on the filler surface under dynamic loads, significantly reducing hysteresis heat generation and improving the dynamic durability of the material. The final network structure of the energy-absorbing and shock-absorbing rubber material is determined by the vulcanization system. Under the synergistic activation of vulcanization auxiliaries, sulfur forms a flexible crosslinking network with the rubber molecular chains, mainly composed of polysulfide bonds. These crosslinking bonds are relatively long and have moderate bond energy, enabling the vulcanized rubber to maintain excellent flexibility while possessing high strength. Zinc oxide / stearic acid activators ensure that the vulcanization reaction proceeds efficiently and fully.

[0015] The energy-absorbing and vibration-damping rubber material prepared by this invention exhibits excellent mechanical properties and energy absorption and vibration damping effects. Through the synergistic formulation of natural rubber and styrene-butadiene rubber, combined with a composite reinforcement system of carbon black and fumed silica, and the introduction of tear-resistant resin, the material possesses both high tensile strength and elongation at break. Simultaneously, the Shore A hardness is controlled within a reasonable range of 60-80, effectively absorbing the vibration energy generated by offshore platforms under the influence of wind, waves, and tides. Compared to materials with a single rubber system or traditional formulations, its tear resistance and fatigue resistance are significantly improved, greatly extending the service life of vibration-damping components for offshore platforms.

[0016] In terms of process optimization, this invention achieves uniform dispersion of each component by controlling the temperature, rotation speed, and time parameters of plasticizing, mastering, and final refining in stages. Specifically, the mastering stage uses a mixing temperature of 80-100℃ in conjunction with the use of a silane coupling agent to enhance the interfacial bonding force between fumed silica and the rubber matrix; the final refining stage is controlled at a low temperature of 70-80℃ to avoid premature reaction of the vulcanizing agent and ensure the stability of vulcanization molding.

[0017] Given the unique characteristics of the marine environment, the combined protective effect of the antioxidant and protective wax in this invention effectively resists the erosion caused by seawater corrosion, ultraviolet aging, and temperature changes. The vulcanization process further enhances the crosslinking density and weather resistance of the material. Compared to rubber materials without a specifically designed protective system, the composite material prepared by this invention exhibits higher performance retention in harsh marine environments such as salt spray and humid heat, ensuring stable energy absorption and vibration damping effects for shock-absorbing components during long-term use and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stress state of an energy absorber made of the energy-absorbing and shock-damping rubber material prepared based on the present invention under a ship impact angle of 0°. Figure 2 This is a schematic diagram of the stress state of an energy absorber made of the energy-absorbing and shock-absorbing rubber material prepared according to the present invention under a ship impact angle of 30°. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Unless otherwise specified, all raw materials, reagents, and equipment used in the following embodiments are commercially available products. Specifically, antioxidant 4010 and antioxidant MB were purchased from Nanjing Chemical Co., Ltd.; carbon black N220 was purchased from Cabot (China) Investment Co., Ltd.; natural rubber was purchased from Yunnan Natural Rubber Industry Group Co., Ltd.; styrene-butadiene rubber 1500E was purchased from Beijing Yanshan Petrochemical Co., Ltd. of China Petrochemical Corporation; vulcanizing agent S-80 was purchased from Shandong Yanggu Huatai Chemical Co., Ltd.; and silane coupling agent Si669 was purchased from Momentive Silicones (Shanghai) Co., Ltd.

[0021] Example 1: A method for preparing an energy-absorbing and shock-damping rubber material for marine platforms, comprising the following steps: The raw materials for energy-absorbing and shock-damping rubber materials include the following components in parts by weight: 100 parts of rubber matrix, including 70 parts of RSS1 type smoked sheet rubber (natural rubber) and 30 parts of 1500E type emulsion styrene-butadiene rubber; 48 parts of reinforcing filler, including 40 parts of carbon black and 8 parts of fumed silica; 1.1 parts of vulcanizing aid, including 0.5 parts of dibenzothiazole disulfide and 0.6 parts of N-cyclohexyl-2-benzothiazole sulfenamide; 2.5 parts sulfur S-80 (vulcanizing agent); 4 parts of bis-(γ-triethoxysilylpropyl)tetrasulfide Si669 (silane coupling agent); 10 parts of vulcanizing activator, composed of zinc oxide and stearic acid in a mass ratio of 20:3; Three parts of antioxidants, including two parts of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and one part of antioxidant MB (2-mercaptobenzimidazole); 2 parts of RW590 protective wax; 4 parts polybutylene terephthalate resin (tear-resistant resin); 6 parts alkyl paraffin oil (softener).

[0022] S1. Raw material preparation and pretreatment: Weigh the raw materials according to their composition and set them aside for use. Pre-treatment is carried out, in which the fumed silica is dried in an oven at 80°C for 2 hours to remove moisture, the sulfiding agent is passed through an 80-mesh sieve to remove impurities, and the protective wax is crushed into particles with a particle size ≤5mm. S2. Rubber plasticizing: Put the rubber matrix into an internal mixer and plasticize it at a temperature of 50℃ and a speed of 80r / min. Stop plasticizing when the Mooney viscosity of the rubber matrix drops to 40. Discharge the plasticized rubber matrix and cool it to room temperature for later use. S3. Preparation of masterbatch: Take the plasticized rubber matrix, vulcanizing activator, reinforcing filler, silane coupling agent and softener, mix them at 80℃ and 60r / min, and discharge the masterbatch. S4. Preparation of final rubber: The masterbatch is put into an internal mixer, and anti-tear resin, protective wax, antioxidant, vulcanizing aid and vulcanizing agent are added. The mixture is mixed at a temperature of 70℃ and a speed of 50r / min, and the final rubber is discharged. S5. Vulcanization molding: Place the final compound rubber into a flat vulcanizing machine, demold it, and cool it to room temperature to obtain the energy-absorbing and shock-absorbing rubber material.

[0023] Example 2: A method for preparing an energy-absorbing and shock-damping rubber material for marine platforms, comprising the following steps: The raw materials for energy-absorbing and shock-damping rubber materials include the following components in parts by weight: 100 parts of rubber matrix, including 80 parts of RSS1 type smoked sheet rubber (natural rubber) and 20 parts of 1500E type emulsion styrene-butadiene rubber; 55 parts of reinforcing filler, including 45 parts of carbon black and 10 parts of fumed silica; 1.8 parts of vulcanizing aid, including 1 part of dibenzothiazole disulfide and 0.8 parts of N-cyclohexyl-2-benzothiazole sulfenamide; 3.5 parts sulfur S-80 (vulcanizing agent); 5 parts of bis-(γ-triethoxysilylpropyl)tetrasulfide Si669 (silane coupling agent); Eight parts of vulcanizing activator, composed of zinc oxide and stearic acid in a mass ratio of 20:3; Nine antioxidants, including six parts of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and three parts of antioxidant MB (2-mercaptobenzimidazole); 5 parts of RW590 protective wax; 5 parts polybutylene terephthalate resin (tear-resistant resin); 7 parts naphthenic oil (softener).

[0024] S1. Raw material preparation and pretreatment: Weigh the raw materials according to their composition and set them aside for use. They are then pretreated, including drying the fumed silica in a 90℃ oven for 2 hours to remove moisture, passing the sulfiding agent through an 80-mesh sieve to remove impurities, and crushing the protective wax into particles with a diameter of ≤5mm. S2. Rubber plasticizing: Put the rubber matrix into an internal mixer and plasticize it at a temperature of 60℃ and a speed of 70r / min. Stop plasticizing when the Mooney viscosity of the rubber matrix drops to 40. Discharge the plasticized rubber matrix and cool it to room temperature for later use. S3. Preparation of masterbatch: Take the plasticized rubber matrix, vulcanizing activator, reinforcing filler, silane coupling agent and softener, mix them at a temperature of 90℃ and a rotation speed of 60r / min, and discharge the masterbatch. S4. Preparation of final rubber: The masterbatch is put into an internal mixer, and anti-tear resin, protective wax, antioxidant, vulcanizing aid and vulcanizing agent are added. The mixture is mixed at a temperature of 75℃ and a speed of 50r / min, and the final rubber is discharged. S5. Vulcanization molding: Place the final compound rubber into a flat vulcanizing machine, demold it, and cool it to room temperature to obtain the energy-absorbing and shock-absorbing rubber material.

[0025] Example 3: A method for preparing an energy-absorbing and shock-damping rubber material for marine platforms, comprising the following steps: The raw materials for energy-absorbing and shock-damping rubber materials include the following components in parts by weight: 100 parts of rubber matrix, including 90 parts of RSS1 type smoked sheet rubber (natural rubber) and 10 parts of 1500E type emulsion styrene-butadiene rubber; 62 parts of reinforcing filler, including 50 parts of carbon black and 12 parts of fumed silica; 1.8 parts of vulcanizing aid, including 0.6 parts of dibenzothiazole disulfide and 1.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide; 4.5 parts sulfur S-80 (vulcanizing agent); 6 parts of bis-(γ-triethoxysilylpropyl)tetrasulfide Si669 (silane coupling agent); Nine parts of vulcanizing activator, composed of zinc oxide and stearic acid in a mass ratio of 20:3; Six parts of antioxidants, including four parts of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and two parts of antioxidant MB (2-mercaptobenzimidazole); 3 parts of RW590 protective wax; 6 parts polybutylene terephthalate resin (tear-resistant resin); 8 parts pine tar (softener).

[0026] S1. Raw material preparation and pretreatment: Weigh the raw materials according to their composition and set them aside for use. Pre-treatment is carried out, in which the fumed silica is dried in an oven at 100℃ for 2 hours to remove moisture, the sulfiding agent is passed through an 80-mesh sieve to remove impurities, and the protective wax is crushed into particles with a particle size ≤5mm. S2. Rubber plasticizing: Put the rubber matrix into an internal mixer and plasticize it at a temperature of 55℃ and a speed of 60r / min. Stop plasticizing when the Mooney viscosity of the rubber matrix drops to 40. Discharge the plasticized rubber matrix and cool it to room temperature for later use. S3. Preparation of masterbatch: Take the plasticized rubber matrix, vulcanizing activator, reinforcing filler, silane coupling agent and softener, mix them at 100℃ and 60r / min, and discharge the masterbatch. S4. Preparation of final rubber: The masterbatch is put into an internal mixer, and anti-tear resin, protective wax, antioxidant, vulcanizing aid and vulcanizing agent are added. The mixture is mixed at a temperature of 80℃ and a speed of 50r / min, and the final rubber is discharged. S5. Vulcanization molding: Place the final compound rubber into a flat vulcanizing machine, demold it, and cool it to room temperature to obtain the energy-absorbing and shock-absorbing rubber material.

[0027] The marine platform energy-absorbing and shock-damping rubber materials prepared in Examples 1-3 and conventional natural rubber materials were tested, and the specific tests are as follows: Hardness test: Tested according to national standard GB / T 531.1-2008; Tensile strength, stress at a given elongation, and elongation at break tests: according to national standard GB / T528 Tested in 2009; Tear strength test: according to national standard GB / T529 Rigorous testing was conducted in 2008; Compression set test: The test was conducted in accordance with the national standard GB / T 7759-2015; Density test: Tested in accordance with national standard GB / T 533-2008.

[0028] The specific test results are shown in Table 1. By comparing the performance of the embodiments of the present invention with that of conventional natural rubber materials, it can be seen that the energy-absorbing and shock-absorbing rubber material for marine platforms prepared by the present invention performs well in five key performance indicators: hardness, tensile strength, elongation at break, tear strength, and compression set. It can fully meet the stringent requirements of marine platforms for key materials.

[0029] Table 1 Performance Characterization Comparison Table The marine platform prepared in Example 1 was used to make an energy absorber using energy-absorbing and shock-damping rubber material, and its stress state was tested at impact angles of 0° and 30°. Figure 1 As shown, the energy absorber should absorb at least 534 kJ of ship impact energy at impact angles of 0 degrees and 30 degrees. The axial and lateral impact energy decompositions at 0-degree and 30-degree conditions are as follows: 0 degrees: Axial impact energy: at least 534 KJ; Transverse impact energy: 0 KJ.

[0030] 30 degrees: Axial impact energy: at least 400KJ; Transverse impact energy: at least 134KJ.

[0031] Verified by API RP 2A standard testing, the energy absorber product achieved a measured energy absorption of 534KJ with a reaction force of 3732KN, effectively reducing impact reaction force and protecting the safety of ship berthing. A 1:5 scale model of the energy absorber underwent 3000 fatigue durability tests, showing no cracks or damage on the surface or internal parts, meeting the required specifications.

[0032] Example 4: This example is the same as Example 1, except that the raw materials for the energy-absorbing and shock-damping rubber material include the following components in parts by mass: 80 parts of rubber matrix, including 70 parts of RSS1 type smoked sheet rubber (natural rubber) and 10 parts of 1500E type emulsion styrene-butadiene rubber; 62 parts of reinforcing filler, including 50 parts of carbon black and 12 parts of fumed silica; 2.7 parts of vulcanizing aid, including 1.5 parts of dibenzothiazole disulfide and 1.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide; 4.5 parts sulfur S-80 (vulcanizing agent); 4 parts of bis-(γ-triethoxysilylpropyl)tetrasulfide Si669 (silane coupling agent); 10 parts of vulcanizing activator, composed of zinc oxide and stearic acid in a mass ratio of 20:3; Three parts of antioxidants, including two parts of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and one part of antioxidant MB (2-mercaptobenzimidazole); 2 parts of RW590 protective wax; 4 parts polybutylene terephthalate resin (tear-resistant resin); A mixture of 6 parts alkyl paraffin oil and pine tar (softener).

[0033] In step S3 of the preparation method, during the preparation of rubber compounding, the plasticized rubber matrix is ​​first added and mixed evenly at 80-100℃ and 60r / min. After the vulcanizing activator is added to the internal mixer and mixed evenly, carbon black is added in batches for mixing. Then, fumed silica and silane coupling agent are added and mixed. Finally, the softener is added and mixed before the masterbatch is discharged.

[0034] Example 5: This example is the same as Example 1, except that the raw materials for the energy-absorbing and shock-damping rubber material include the following components in parts by weight: 120 parts of rubber matrix, including 90 parts of RSS1 type smoked sheet rubber (natural rubber) and 30 parts of 1500E type emulsion styrene-butadiene rubber; 62 parts of reinforcing filler, including 50 parts of carbon black and 12 parts of fumed silica; 2.7 parts of vulcanizing aid, including 1.5 parts of dibenzothiazole disulfide and 1.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide; 4.5 parts sulfur S-80 (vulcanizing agent); 4 parts of bis-(γ-triethoxysilylpropyl)tetrasulfide Si669 (silane coupling agent); 10 parts of vulcanizing activator, composed of zinc oxide and stearic acid in a mass ratio of 20:3; Three parts of antioxidants, including two parts of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and one part of antioxidant MB (2-mercaptobenzimidazole); 2 parts of RW590 protective wax; 4 parts polybutylene terephthalate resin (tear-resistant resin); A mixture of 6 parts naphthenic oil and pine tar (softener).

[0035] In step S4 of the preparation method, when preparing the final rubber, the masterbatch is first preheated in a mixer and the temperature is maintained at 70-80℃. After the tear-resistant resin and protective wax are added to the mixer and mixed evenly, the antioxidant, vulcanizing aid and vulcanizing agent are added in batches and mixed in stages. Finally, the final rubber is obtained by discharging the rubber.

[0036] Example 6: This example is the same as Example 1, except that, In step S3 of the preparation method, during the preparation of rubber compounding, the plasticized rubber matrix is ​​first added and mixed evenly at 80-100℃ and 60r / min. After the vulcanizing activator is added to the internal mixer and mixed evenly, carbon black is added in batches for mixing. Then, fumed silica and silane coupling agent are added and mixed. Finally, the softener is added and mixed before the masterbatch is discharged.

[0037] In step S4 of the preparation method, when preparing the final rubber, the masterbatch is first preheated in a mixer and the temperature is maintained at 70-80℃. After the tear-resistant resin and protective wax are added to the mixer and mixed evenly, the antioxidant, vulcanizing aid and vulcanizing agent are added in batches and mixed in stages. Finally, the final rubber is obtained by discharging the rubber.

Claims

1. An energy-absorbing shock-absorbing rubber material for use in an offshore platform, characterized by, The raw materials of the energy-absorbing shock-absorbing rubber material include the following components in mass fraction: Rubber matrix 80-120 parts, reinforcing filler 48-62 parts, vulcanization aid 1.1-2.7 parts, vulcanizing agent 2.5-4.5 parts, silane coupling agent 4-6 parts, vulcanization activator 8-10 parts, antioxidant 3-9 parts, protective wax 2-5 parts, tear-resistant resin 4-6 parts, softening agent 6-8 parts; The rubber matrix includes a mixture of natural rubber and styrene-butadiene rubber, wherein the natural rubber is 70-90 parts by mass and the styrene-butadiene rubber is 10-30 parts by mass; The reinforcing filler includes carbon black and fumed white carbon black, wherein the carbon black is 40-50 parts by mass and the fumed white carbon black is 8-12 parts by mass; The vulcanization activator is composed of zinc oxide and stearic acid in a mass ratio of 20:

3.

2. The energy-absorbing shock-absorbing rubber material for an offshore platform according to claim 1, characterized by The vulcanization aid includes a mixture of diphenyl disulfide and N-cyclohexyl-2-benzothiazole sulfenamide, wherein the diphenyl disulfide is 0.5-1.5 parts by mass and the N-cyclohexyl-2-benzothiazole sulfenamide is 0.6-1.2 parts by mass.

3. The energy-absorbing shock rubber material for offshore platforms according to claim 1, characterized in that, The natural rubber in the rubber matrix is RSS1 type tobacco sheet rubber, and the styrene-butadiene rubber in the rubber matrix is 1500E type emulsion polymerized styrene-butadiene rubber.

4. The energy-absorbing shock-absorbing rubber material for offshore platforms according to claim 1, characterized in that, The vulcanizing agent is sulfur S-80; The silane coupling agent is bis-(gamma-triethoxysilylpropyl) tetrasulfide Si669; The antioxidant includes a mixture of antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) and antioxidant MB (2-mercaptobenzimidazole) in a mass ratio of 2:1, wherein the antioxidant 4010 (N-isopropyl-N'-phenyl-p-phenylenediamine) is 2-6 parts by mass and the antioxidant MB (2-mercaptobenzimidazole) is 1-3 parts by mass; The protective wax is RW590; The tear-resistant resin is polybutylene terephthalate resin.

5. The energy-absorbing shock-absorbing rubber material for an offshore platform according to claim 1, characterized by The softening agent is one or more of paraffin oil, naphthenic oil, and pine tar oil, wherein the paraffin oil is an alkyl type paraffin oil.

6. The method of claim 1-5, wherein the method further comprises the step of: The method includes the following steps: S1, raw material preparation and pretreatment: the raw materials are weighed according to the raw material components and pretreated, wherein the fumed white carbon black is dried in an oven at 80-100°C for 2 hours to remove water, and the vulcanizing agent is sieved through an 80-mesh sieve to remove impurities, and the protective wax is broken into particles with a particle size of ≤5 mm; S2, rubber plasticizing: the rubber matrix is put into a mixer, plasticized at a temperature of 50-60°C and a speed of 60-80 r / min, and stopped when the rubber matrix Mooney viscosity is reduced to 40, and the plasticized rubber matrix is cooled to room temperature for standby; S3, masterbatch preparation: the plasticized rubber matrix, vulcanization activator, reinforcing filler, silane coupling agent, and softening agent are mixed at a temperature of 80-100°C and a speed of 60 r / min, and the masterbatch is discharged; S4, final rubber preparation: the masterbatch is put into a mixer, and the tear-resistant resin, protective wax, antioxidant, vulcanization aid, and vulcanizing agent are mixed at a temperature of 70-80°C and a speed of 50 r / min, and the final rubber is discharged. S5, vulcanization: the final refining rubber into a flat vulcanizing machine, after cooling to room temperature, the energy-absorbing shock rubber material.

7. The method for preparing the energy-absorbing shock-absorbing rubber material for offshore platforms according to claim 6, characterized by, In the step S3, the masterbatch preparation, first put in the plastic after the rubber matrix, 80-100 ℃, 60 r / min under the conditions of mixing uniform; the vulcanization active agent into the mixing mill mixing uniform, batch adding carbon black mixing, followed by adding fumed silica and silane coupling agent mixing, finally add softening agent mixing after the masterbatch.

8. The method for preparing the energy-absorbing and shock-damping rubber material for marine platforms according to claim 7, characterized in that, In the step S4, the final refining rubber preparation, first masterbatch in the mixing mill preheating, temperature maintained at 70-80 ℃; the tear resistant resin and protective wax into the mixing mill mixing uniform, batch adding and mixing gradually, finally the rubber got final refining.

9. The method of claim 6, wherein the energy absorbing shock rubber material for offshore platforms is prepared by the steps of: The process conditions of the step S5 vulcanization molding is 145±5 ℃, 10±1 MPa pressure, vulcanization time 600±100 seconds.

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