Silica gel hose kit as well as production process and application thereof

Abstract

The invention relates to the field of silicone rubber tubes, in particular to a silicone rubber hose kit and a production process and application thereof. A silica gel hose kit comprises a hose body and two flanges installed at the two ends of the hose body, and is characterized in that the hose body is sequentially provided with a first fluorine-containing rubber layer, a first silicon rubber layer, a framework material layer, a second silicon rubber layer, a second fluorine-containing rubber layer and a stainless steel layer from the inner surface to the outer surface; the first fluorine-containing rubber layer and the second fluorine-containing rubber layer are mainly made of fluorine rubber or silicon fluorine rubber; the framework material layer is made of an aramid fiber material or a polyester material; through the multi-layer structure of the first fluorine-containing rubber layer, the first silicon rubber layer, the framework material layer, the second silicon rubber layer, the second fluorine-containing rubber layer and the stainless steel layer which are sequentially arranged, the compression resistance of the silica gel hose kit is remarkably improved, and the silica gel hose kit can stably operate in a high-pressure environment.

Description

Technical Field

[0001] This application relates to the field of silicone rubber tubes. More specifically, it relates to a silicone hose kit, its production process, and applications. Background Art

[0002] As a common flexible pipe material, silicone hoses are widely used in fields such as chemical engineering, petroleum, and offshore engineering. With the development of modern industry and technological progress, the performance requirements for hoses are increasing day by day. Especially in extreme environments such as high pressure, high salt, and low temperature, their durability and reliability have become key indicators. Such products not only need to have good flexibility to adapt to complex working conditions but also need to have strong compressive strength and corrosion resistance to ensure long-term stable operation, which poses a severe challenge to the design of hoses.

[0003] In the face of such demands, the industry generally adopts various strategies to improve the performance of traditional silicone hoses. For example, by adding different types of functional coatings to enhance surface protection capabilities; using composite materials to form multi-layer structures, where each layer has specific functions, such as the inner layer being responsible for corrosion prevention, the middle layer providing mechanical support, and the outer layer focusing on protecting against external damage; in addition, special formula silicone rubbers are selected as the base material to improve basic properties. However, in addition to this, it also includes improving the manufacturing process flow, such as precisely controlling the vulcanization temperature and time parameters to obtain higher-quality finished product quality.

[0004] Nevertheless, the existing silicone hoses still have some deficiencies. Even with multi-layer designs and functional coatings, in actual applications, especially when working under high pressure, high salt, and low temperature conditions, problems such as rupture still occur. This indicates that traditional strengthening measures fail to fully meet the comprehensive performance requirements under extreme working conditions, and there is an urgent need to develop new design solutions to overcome these limitations to achieve a higher overall performance level. Summary of the Invention

[0005] In order to improve the compressive performance of silicone pipe fittings and ensure their tolerance in environments such as low temperature, high pressure, and high salt, this application provides a silicone hose kit, its production process, and applications.

[0006] A silicone hose kit includes a pipe body and two flanges installed at both ends of the pipe body. The pipe body is sequentially provided with a first fluororubber layer, a first silicone rubber layer, a skeleton material layer, a second silicone rubber layer, a second fluororubber layer, and a stainless steel layer from the inner surface to the outer surface; the main materials in the first fluororubber layer and the second fluororubber layer are fluororubber or fluorosilicone rubber; the skeleton material layer is aramid material or polyester material.

[0007] By adopting the above technical solutions, the silicone hose kit has the following effects: First, the multi-layer structure design of the first fluororubber layer, the first silicone rubber layer, the skeleton material layer, the second silicone rubber layer, the second fluororubber layer, and the stainless steel layer arranged in sequence from the inside to the outside greatly improves the overall performance of the pipe fitting.

[0008] Among them, the fluororubber layer, due to its excellent oil resistance, temperature resistance and chemical corrosion resistance characteristics, ensures the sealing stability of the pipe fitting under high-pressure environments and enhances its compressive and corrosion resistance capabilities; the silicone rubber layer, with its high flexibility, high elasticity and excellent temperature resistance, further strengthens the flexibility and partial compressive function of the pipe fitting; the skeleton material layer selects aramid or polyester materials, and with its high strength and high modulus characteristics, it becomes the key component to bear the main pressure, significantly improving the overall compressive performance; the outermost stainless steel layer has high strength and excellent corrosion resistance, providing additional protection against external environmental damage. Generally speaking, this design scheme endows the silicone hose kit with excellent compressive performance and excellent tolerance capabilities under extreme conditions such as salts, low temperatures, and high pressures.

[0009] Preferably, the first fluororubber layer, the second fluororubber layer, the first silicone rubber layer, and the second silicone rubber layer all contain modified silicone rubber masterbatch.

[0010] By adopting the above technical solutions, the first fluororubber layer, the second fluororubber layer, the first silicone rubber layer, and the second silicone rubber layer all contain modified silicone rubber masterbatch, thereby significantly improving the compressive performance, salt resistance performance and low temperature resistance performance of each layer structure. At the same time, the introduction of the modified silicone rubber masterbatch enhances the connection stability between layers, ensuring that the entire pipe fitting can still maintain excellent overall performance and reliability under extreme environmental conditions such as high pressure, high salt and low temperature.

[0011] Preferably, the silicone rubber masterbatch is composed of the following raw materials in parts by weight: 100 parts of vinyl silicone rubber raw rubber 10 - 15 parts of hydroxy silicone oil 1 - 5 parts of methyl silicone oil 20 - 30 parts of filling and reinforcing agent 2 - 10 parts of modifier; The modifier is composed of divinyl hydrocarbon silane, divinyl aromatic silane, and hydroxy-containing silane in a weight ratio of 1:(0.3 - 0.7):(0.1 - 0.5).

[0012] By adopting the above technical solution, the silicone rubber compound is composed of vinyl silicone rubber raw rubber, hydroxyl silicone oil, methyl silicone oil, filler reinforcing agent and modifier in specific proportions, wherein the modifier includes divinylhydrocarbon silane, divinylaromatic silane and hydroxyl-containing silane. This combination brings the following effects: Salt corrosion resistance: The chemical stability of hydroxyl silicone oil and methyl silicone oil enables the silicone rubber to effectively resist the erosion of salts and other chemical substances. Low-temperature resistance: The vinyl silicone rubber raw rubber and methyl silicone oil act synergistically to maintain the flexibility and elasticity of the silicone rubber under low-temperature conditions and meet the requirements of cold environments.

[0013] Improved mechanical properties: Filler reinforcing agents (such as fumed silica and glass fiber powder) significantly enhance the tensile strength, tear strength and abrasion resistance of the silicone rubber; the divinylhydrocarbon silane and divinylaromatic silane in the modifier increase the crosslinking density, further strengthening the mechanical properties of the silicone rubber. Interlayer connection stability: The hydroxyl-containing silane improves the compatibility and dispersibility between the layers of the silicone rubber, enhances the bonding force between the layers, and prevents peeling or falling-off phenomena. It also acts synergistically with the divinylhydrocarbon silane and divinylaromatic silane to increase the crosslinking density and improve the comprehensive properties of the silicone rubber.

[0014] In summary, the present application uses the compounding of divinylhydrocarbon silane, divinylaromatic silane and hydroxyl-containing silane, which can not only improve the compatibility of the reinforcing filler in the silicone rubber raw material system, but also further increase the crosslinking density of the silicone rubber raw material system, making it easier to form a crosslinked network structure, and thus the obtained pipe body has better comprehensive properties. It can also promote the connection stability between the layers and further improve the comprehensive properties of the pipe body.

[0015] Preferably, the divinylhydrocarbon silane is bis-3-methacryloxypropyltetramethyldisiloxane and / or 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane.

[0016] By adopting the above technical solution, bis-3-methacryloxypropyltetramethyldisiloxane and / or 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane as the divinylhydrocarbon silane, its high reaction activity significantly enhances the crosslinking density of the silicone rubber. This improvement effectively enhances the mechanical properties, heat resistance and chemical corrosion resistance of the silicone rubber. Specifically, the introduced vinyl hydrocarbon silane improves the tensile strength, tear strength and hardness of the silicone rubber, and at the same time endows it with better high-temperature resistance and low-temperature resistance. In addition, due to the formation of a more compact chemical bond network, the resistance of the silicone rubber to chemical substances such as acids, alkalis and salts is also enhanced, thus ensuring that the silicone hose kit can still maintain excellent comprehensive properties and reduce the possibility of damage under extreme environmental conditions such as high pressure, high salt and low temperature.

[0017] Preferably, the divinyl aromatic silane is 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane and / or 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane.

[0018] By adopting the above technical solution, the effective improvement of the crosslinking density in the silicone rubber compound is achieved. As one of the key components, the divinyl aromatic silane endows the silicone rubber with higher heat resistance and mechanical strength due to its unique chemical structure. Specifically, the vinyl groups in the divinyl aromatic silane can undergo efficient crosslinking reactions with the active groups on the silicone rubber molecular chain, forming a denser three-dimensional network structure, thereby significantly enhancing the tensile strength, tear strength and hardness of the silicone rubber. In addition, due to the presence of its benzene ring structure, the antioxidant capacity and thermal stability of the silicone rubber are further improved, ensuring that the pipe fittings can still maintain excellent performance under high-temperature conditions. This improvement plays an important role in enhancing the overall compressive capacity of the silicone hose kit and its durability in extreme environments.

[0019] Preferably, the hydroxy silane is N-(2-hydroxyethyl)-N,N-bis(trimethoxysilylpropyl)amine.

[0020] By adopting the above technical solution, using N-(2-hydroxyethyl)-N,N-bis(trimethoxysilylpropyl)amine as the hydroxy silane can significantly improve the crosslinking density and stability of the silicone rubber system. The introduction of this component enhances the bonding force between the silicone rubber layer and other materials, effectively improves the dispersibility of the filler reinforcing agent, and thus comprehensively improves the mechanical strength, low-temperature resistance and salt corrosion resistance of the silicone hose kit. In addition, due to its good reactivity and hydrophilicity, the connection stability between the layers can be further strengthened, ensuring that the pipe fittings have excellent overall performance under complex working conditions.

[0021] And it plays a synergistic role with divinyl hydrocarbon silane (bis-3-methacryloxypropyl-terminated tetramethyldisiloxane and / or 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane), divinyl aromatic silane (1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane and / or 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane), further optimizing the crosslinking network of the silicone rubber and the compatibility between components, and can further improve the resistance of the silicone rubber to harsh environments such as low temperature, salt corrosion and high pressure, making it show excellent performance in various application scenarios.

[0022] Preferably, the filler reinforcing agent is composed of fumed silica and glass fiber powder.

[0023] By adopting the above technical solution, the filler reinforcing agent composed of silica and glass fiber powder significantly improves the comprehensive performance of silicone rubber. Due to its high surface area and good dispersibility, silica enhances the cohesion and mechanical strength of silicone rubber, ensuring excellent physical properties of the material even under low-temperature conditions. The glass fiber powder further improves the overall tensile strength and bending resistance of silicone rubber by forming a multi-dimensional network structure, while enhancing the hardness and high-pressure resistance of the material. The synergistic effect of the two effectively improves the stability and durability of the silicone hose kit in complex environments, especially showing excellent performance in extreme working conditions such as deep sea.

[0024] Preferably, the silicone rubber masterbatch is prepared by the following method: By weight, weigh the filler reinforcing agent and the modifier and mix them evenly to obtain mixture A for standby; weigh the vinyl silicone rubber raw rubber, hydroxy silicone oil, and methyl silicone oil, start heating at 1 - 3 °C / min, and add mixture A in batches. After all are mixed evenly, raise the temperature to 165 - 175 °C and react for 2 - 4 h, cool to 45 - 55 °C, discharge, knead the rubber, and filter to obtain the silicone rubber masterbatch.

[0025] By adopting the above technical solution, the preparation method of the silicone rubber masterbatch realizes the effective mixing and reaction of each component, ensuring the performance optimization of the final product. Specifically, the filler reinforcing agent and the modifier are pre-mixed evenly, effectively improving the dispersibility and compatibility between the silicone rubber matrix and the additives in the subsequent process, thereby enhancing the mechanical strength and durability of the silicone rubber. The mixing process of the vinyl silicone rubber raw rubber, hydroxy silicone oil, and methyl silicone oil under gradually increasing temperature conditions not only ensures the full dissolution and distribution of the materials. In particular, the method of adding mixture A in batches avoids the problem of too high local concentration that may be caused by one-time feeding, making the whole system more stable. Finally, through the long-time reaction treatment with precise temperature control, the formed silicone rubber masterbatch has excellent comprehensive performance, including but not limited to high strength, good elasticity, and excellent high and low temperature resistance, laying a solid foundation for the reliable operation of the silicone hose kit under complex working conditions.

[0026] In the second aspect, a preparation method of a silicone hose kit includes the following steps: 1) Extrude the uncured fluororubber and cure and shape it to obtain the first fluororubber layer; 2) Coat the silicone rubber solution on the first fluororubber layer and conduct preliminary vulcanization to obtain the first incompletely vulcanized silicone layer; 3) Weave a skeleton material layer on the surface of the first incompletely vulcanized silicone layer; then coat a silicone rubber layer on the skeleton material layer and vulcanize and shape it to form the first silicone layer and the second silicone layer; 4) Extrude the uncured fluororubber to coat it on the surface of the second silicone layer and cure and shape it to form the second fluorosilicone layer; 5) Wind a steel wire around the surface of the second fluorosilicone rubber layer to form a steel wire layer, obtaining a pipe body; 6) Install flanges at both ends of the pipe body to obtain a silicone hose kit.

[0027] By adopting the above technical solutions, this preparation method realizes the efficient production of the silicone hose kit, while ensuring the high quality and excellent performance of the product. The specific effects are as follows: Step-by-step forming process: By processing the fluororubber layer, silicone rubber layer, skeleton material layer, and stainless steel layer layer by layer, the quality controllability of each step is guaranteed, avoiding the defect problems that may be brought about by one-time forming.

[0028] High interface bonding quality: A reasonable transition method (such as partial vulcanization first and then covering a new layer) is adopted between different materials, effectively improving the adhesion strength between functional layers and reducing the cracking risk caused by stress concentration.

[0029] Good structural integrity: The entire manufacturing process is scientifically and reasonably designed. Especially the design and implementation of the steel wire mesh reinforcement layer greatly enhance the overall rigidity and extrusion resistance of the hose.

[0030] Enable the finally obtained product to have excellent high-pressure resistance, corrosion resistance, and the ability to adapt to complex working conditions, and is particularly suitable for working requirements under harsh environmental conditions such as the deep sea.

[0031] In the third aspect, an application of a silicone hose kit, the silicone hose kit is applied to a reinforcing device of a deep-sea diving motor, and the silicone hose kit is a silicone hose kit according to any one of claims 1-8.

[0032] By adopting the above technical solutions, the silicone hose kit exhibits excellent comprehensive performance in the reinforcing device of the deep-sea diving motor. Specifically, it has high compressive performance: Due to the structural design of the first fluororubber layer, the first silicone rubber layer, the skeleton material layer, the second silicone rubber layer, the second fluororubber layer, and the stainless steel layer arranged in sequence from the inside to the outside, combined with the excellent characteristics of each layer of material, the silicone hose kit can withstand extremely high pressures in the deep-sea environment and ensure stable operation under complex working conditions.

[0033] Salt corrosion resistance: The combination of fluororubber and silicone rubber endows the hose kit with excellent chemical corrosion resistance, is particularly suitable for long-term use in a marine environment with a high salt concentration, and effectively avoids aging or damage caused by salt erosion.

[0034] Low-temperature resistance: The excellent low-temperature characteristics of silicone rubber, especially the modified silicone rubber compound, ensure that the hose kit can maintain good flexibility and sealing performance even under the low-temperature conditions of the deep sea.

[0035] Overall stability: By finely regulating the composition of the silicone rubber compound, including the rational compatibility of modifiers such as divinyl hydrocarbon silane, divinyl aromatic silane, and hydroxyl-containing silane, the connection stability between layers and the overall mechanical properties are significantly improved, reducing the possibility of damage in high-pressure, high-salt, and low-temperature environments.

[0036] In summary, the silicone hose kit provided by this solution, with its unique multi-layer structure design and carefully formulated material recipe, achieves a high balance of multiple key indicators such as compressive resistance, salt corrosion resistance, and low-temperature resistance in the application of deep-sea diving motor strengtheners, meeting the requirements of harsh working conditions.

[0037] In summary, this application includes at least one of the following beneficial technical effects: 1. By adopting a multi-layer structure of a first fluororubber layer, a first silicone rubber layer, a skeleton material layer, a second silicone rubber layer, a second fluororubber layer, and a stainless steel layer arranged in sequence from the inside to the outside, the compressive performance of the silicone hose kit is significantly improved, enabling it to operate stably in a high-pressure environment. 2. The first fluororubber layer and the second fluororubber layer have excellent chemical corrosion resistance. Combining the good flexibility of the silicone rubber layer and the high-strength support of the skeleton material layer, the corrosion resistance of the hose in a high-salt environment is greatly enhanced. 3. The skeleton material layer is made of aramid or polyester material, and together with the excellent low-temperature performance of the inner and outer layers of silicone rubber, it ensures the flexibility and sealing performance of the hose under low-temperature conditions, further expanding its scope of application.

[0038] 4. This application uses a compound of divinyl hydrocarbon silane, divinyl aromatic silane, and hydroxyl-containing silane, which can not only improve the compatibility of the reinforcing filler in the silicone rubber raw material system, but also further increase the crosslinking density of the silicone rubber raw material system, making it easier to form a crosslinked network structure, and thus enabling the obtained pipe body to have better comprehensive performance. It can also promote the connection stability between layers and further improve the comprehensive performance of the pipe body. The pipe body not only has high compressive strength, but also has high tolerance to harsh environments such as low temperature, high salt, and high pressure. Brief Description of the Drawings

[0039] Figure 1 is a schematic structural diagram of a silicone hose kit of this application.

[0040] Figure 2 is a schematic structural diagram of the pipe fitting of a silicone hose kit of this application.

[0041] Brief Description of the Drawings: 1. Pipe body; 2. Flange; 11. First fluororubber layer; 12. First silicone rubber layer; 13. Skeleton material layer; 14. Second silicone rubber layer; 15. Second fluororubber; 16. Stainless steel layer. Detailed Embodiments

[0042] The present application will be further described in detail below in conjunction with embodiments.

[0043] The number-average molecular weight of the vinyl silicone rubber raw rubber is 300,000 - 500,000, and the vinyl content is 0.13 - 0.18%; Methyl silicone oil: The relative molecular weight is 10,000 - 20,000; The hydroxyl silicone oil is JP-208-30 hydroxyl silicone oil, which is a hydroxyl silicone oil with a molecular weight of 2,000. Its appearance is a colorless transparent liquid, and its viscosity at 25°C is 15 - 40 mm 2 / s, and the hydroxyl content is 6 - 10%; Both the white carbon black and the glass fiber powder are sieved through 1000 meshes; Preparation Examples of Silicone Rubber Masterbatch Preparation Example 1 The silicone rubber masterbatch is prepared by the following method: By weight, 20 kg of a filler reinforcing agent and 10 kg of a modifier are weighed and put into a stirring device. At a rotation speed of 200 r / min, it is stirred for 10 min to make it fully and evenly mixed to obtain a mixture A for standby; 100 kg of vinyl silicone rubber raw rubber, 10 kg of hydroxyl silicone oil, and 5 kg of methyl silicone oil are weighed and put into a kneading machine to stir until the materials are evenly mixed. Then, it is heated at a rate of 1°C / min and added to the mixture A in 2 batches. After each addition and thorough mixing, the other batch is added. After all are evenly mixed, the temperature is raised to 165°C and reacted for 4 h, cooled to 45°C, discharged, and then put into a two-roll rubber mill for rubber mixing, and then filtered through a silicone rubber filtering device to obtain the silicone rubber masterbatch.

[0044] Among them, the filler reinforcing agent is composed of white carbon black and glass fiber powder in a weight ratio of 1:1; the modifier is composed of divinyl hydrocarbon silane, divinyl aromatic silane, and hydroxyl-containing silane in a weight ratio of 1:0.3:0.2; among them, the divinyl hydrocarbon silane is bis-3-methacryloxypropyltetramethyldisiloxane, the divinyl aromatic silane is 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane, and the hydroxyl-containing silane is N-(2-hydroxyethyl)-N,N-bis(trimethoxysilylpropyl)amine.

[0045] Preparation Example 2 The difference between Preparation Example 2 and Preparation Example 1 is that the dosages of the raw materials are different, as shown in Table 1 specifically; Table 1 Dosages of Raw Materials in Preparation Examples 1 - 3 (by weight) Preparation Example 4 Preparation Example 4 is different from Preparation Example 2 in that the divinylhydrocarbylsilane is 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane.

[0046] Preparation Example 5 Preparation Example 5 is different from Preparation Example 2 in that the divinylhydrocarbylsilane is composed of bis-3-methacryloxypropyltetramethyldisiloxane and 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane in a weight ratio of 1:1.

[0047] Preparation Example 6 Preparation Example 6 is different from Preparation Example 2 in that the divinylarylsilane is 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane.

[0048] Preparation Example 7 Preparation Example 7 is different from Preparation Example 2 in that the divinylarylsilane is composed of 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane and 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane in a weight ratio of 1:2.

[0049] Preparation Example 8 Preparation Example 8 is different from Preparation Example 5 in that the divinylarylsilane is composed of 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane and 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane in a weight ratio of 1:2.

[0050] Preparation Example 9 Preparation Example 9 is different from Preparation Example 2 in that the filler reinforcing agent is fumed silica.

[0051] Preparation Comparative Example Preparation Comparative Example 1 Preparation Comparative Example 1 is different from Preparation Example 2 in that the modifier is replaced with an equal amount of hydroxy silicone oil.

[0052] Preparation Comparative Example 2 Preparation Comparative Example 2 is different from Preparation Example 2 in that the divinylhydrocarbylsilane is replaced with an equal amount of divinylarylsilane.

[0053] Preparation Comparative Example 3 Preparation Comparative Example 3 is different from Preparation Example 2 in that the divinylarylsilane is replaced with an equal amount of divinylhydrocarbylsilane.

[0054] Preparation Comparative Example 4 Preparation Comparative Example 4 is different from Preparation Example 2 in that the hydroxy-containing silane is replaced with an equal amount of divinylarylsilane.

[0055] Preparation Comparative Example 5 The difference between Preparation Comparative Example 5 and Preparation Example 2 is that the modifier is divinyl hydrocarbon silane. Examples

[0056] Example 1 A silicone hose kit, see Figure 1 and Figure 2 , including a tube body 1 and two flanges 2 installed at both ends of the tube body 1. The tube body 1 is sequentially provided with a first fluororubber layer 11, a first silicone rubber layer 12, a skeleton material layer 13, a second silicone rubber layer 14, a second fluororubber 15, and a stainless steel layer 16 from the inner surface to the outer surface. Among them, the thicknesses of both the first fluororubber layer 11 and the second fluororubber 15 are 0.5 mm, and the thicknesses of both the first silicone rubber layer 12 and the second silicone rubber layer 14 are 0.25 mm; the inner diameter of the tube body 1 is 2 cm.

[0057] This silicone hose kit is prepared by the following method: 1) Put the uncured fluororubber into an extrusion device for extrusion to initially form a tube blank, and then enter a curing device, heat to 180 °C, and vulcanize and shape for 10 min to obtain the first fluororubber layer; 2) Coat the silicone rubber solution on the first fluororubber layer through a coating device, and perform preliminary vulcanization. The curing time is 1 min, and the curing temperature is 130 °C to obtain an incompletely vulcanized first silicone rubber layer; 3) Weave the braided wire of aramid material on the surface of the incompletely vulcanized first silicone rubber layer. After weaving, a skeleton material layer is formed; then coat the silicone rubber solution on the skeleton material layer, heat to 180 °C, and perform vulcanization and shaping for 5 min to form the first silicone rubber layer and the second silicone rubber layer; 4) Extrude the uncured fluororubber so that it covers the surface of the second silicone rubber layer, and cure and shape to obtain the tube body; 5) Wind 304 steel wires with a wire diameter of 0.2 mm on the surface of the second fluorosilicone rubber layer, and the winding density is 20 turns / 40 mm to form a steel wire layer to obtain the tube body; 6) Install flanges at both ends of the tube body to obtain a silicone hose kit.

[0058] The uncured fluororubber is composed of a fluororubber masterbatch (Solvay FKM FOR 421 / U), a silicone rubber masterbatch (IOTAHCR 1960U), and bis-2,5-bis(t-butylperoxy)-2,5-dimethylhexane, which are kneaded evenly in a weight ratio of 1.2:1:0.05.

[0059] The silicone rubber solution is composed of a silicone rubber masterbatch (IOTA HCR 1960U), a platinum catalyst, a hydrogen-containing silicone oil (hydrogen content 0.28 - 0.5%), and polydimethylsiloxane (Wacker AK-500 dimethyl silicone oil from Germany), which are mixed evenly in a weight ratio of 10:0.3:0.3:2.

[0060] The wire diameter of the braided wire of the aramid material is 0.1 mm, and the braiding specification is: 20 turns / 40 mm; Example 2-15 The difference between Example 2-15 and Example 1 lies in that the source of the silicone rubber masterbatch is different, as shown in Table 2; Table 2 Sources of the silicone rubber masterbatch of Example 2-15 Comparative example Comparative example 1 The difference between Comparative example 1 and Example 1 is that the fluororubber masterbatch is replaced with the silicone rubber masterbatch in equal amount.

[0061] Comparative example 2 The difference between Comparative example 2 and Example 1 is that it does not contain the first silicone layer and the second silicone layer, specifically as follows: 1) Put the uncured fluororubber into an extrusion device for extrusion to initially form a tube blank, and then enter a curing device, heat to 180 °C, and vulcanize and shape for 10 min to obtain the first fluororubber layer; 2) Braiding is carried out on the surface of the first fluororubber layer with the braided wire of the aramid material, and a skeleton material layer is formed after braiding; 3) Extrude the uncured fluororubber so that it covers the surface of the skeleton material layer, and cure and shape to obtain a tube body; 4) Wind 304 steel wires with a wire diameter of 0.2 mm on the surface of the second fluorosilicone layer, and the winding density is 20 turns / 40 mm to form a steel wire layer, and obtain a tube body; 5) Install flanges at both ends of the tube body to obtain a silicone hose kit.

[0062] Application example Application example 1 An application of a silicone hose kit, which is applied to a reinforcing device of a deep-sea diving motor, and the silicone hose kit is a silicone hose kit obtained in Example 1.

[0063] Application example 2 The difference between Application example 2 and Application example 1 is that the source of the silicone hose kit is different; Table 3 Sources of the silicone hose kits of Application example 1-17 Performance detection test Detection method / Test method The silicone hose kits obtained in Examples 1-15 and Comparative Examples 1-2 were subjected to the following performance tests; Specimen 1: The silicone hose kits obtained in Examples 1-15 and Comparative Examples 1-2; Specimen 2: The silicone hose kits obtained in Examples 1-15 and Comparative Examples 1-2 were placed in a 10% salt water with a temperature of 1°C and a pressure of 50 MPa for 1 month, taken out, rinsed, and air-dried.

[0064] The compressive properties of Specimen 1 and Specimen 2 were respectively detected. Specifically, one end of the pipe fitting of the silicone hose kit was sealed, and the other end was connected to a pressure booster. The pressure was continuously increased at a rate of 0.1 MPa / 10 s until it burst, and the pressure value at the time of bursting was recorded. Among them, Specimen 1 was denoted as A; Specimen 2 was denoted as B, and the compressive rate was calculated. The compressive efficiency was equal to B divided by A, and then multiplied by 100%.

[0065] The above experiments were all repeated 3 times, and the average value was taken. The specific data is shown in Table 3; Table 4 Experimental data of Examples 1-15 and Comparative Examples 1-2 Combined with Example 1 and Comparative Examples 1-2 and Table 4, it can be seen that the compressive pressures of Comparative Examples 1-2 are significantly lower than that of Example 1, and the compressive efficiency of Comparative Example 1 is significantly reduced, indicating that the fluorine-containing silicone rubber layer used in this application has a high tolerance to low temperature, high pressure, and high salt environments. Specifically, in Comparative Example 2, without using the first silicone layer and the second silicone layer, due to the action of low temperature, high pressure, and high salt, especially high pressure, the connection tightness between its layer structures is reduced, which is likely to cause phenomena such as peeling between the layer structures, thereby reducing its compressive performance and tolerance to harsh environments.

[0066] Combined with Example 1 and Example 2 and Table 4, it can be seen that the modified silicone rubber masterbatch prepared by this application can play a better cross-linking role under the action of a vulcanizing agent, enabling it to produce a cross-linked network structure polymer with better physical properties, improving its compressive performance, and at the same time reducing the tolerance in high-pressure, low-temperature, and high-salt environments.

[0067] This specific embodiment is only an explanation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A silicone hose kit, comprising a tube body and two flanges mounted at both ends of the tube body, characterized in that, The tube body is sequentially provided with a first fluororubber layer, a first silicone rubber layer, a skeleton material layer, a second silicone rubber layer, a second fluororubber, and a stainless steel layer from the inner surface to the outer surface; the main materials in the first fluororubber layer and the second fluororubber layer are fluororubber or fluorosilicone rubber; the skeleton material layer is aramid material or polyester material.

2. The silicone hose kit according to claim 1, wherein: The first fluororubber layer, the second fluororubber layer, the first silicone rubber layer, and the second silicone rubber layer all contain modified silicone rubber masterbatch.

3. The silicone hose kit according to claim 2, wherein: The silicone rubber masterbatch is composed of the following raw materials in parts by weight: 100 parts of vinyl silicone rubber raw rubber 10 - 15 parts of hydroxyl silicone oil 1 - 5 parts of methyl silicone oil 20 - 30 parts of filler reinforcing agent 2 - 10 parts of modifier; The modifier is composed of divinyl hydrocarbon silane, divinyl aromatic silane, and hydroxyl-containing silane in a weight ratio of 1:(0.3 - 0.7):(0.1 - 0.5).

4. A silicone hose kit according to claim 3, characterized in that: The divinyl hydrocarbon silane is bis-3-methacryloxypropyltetramethyldisiloxane and / or 1,3-bis(3-methacryloxypropyl)tetrakis(trimethylsiloxy)disiloxane.

5. A silicone hose kit according to claim 3, characterized in that: The divinyl aromatic silane is 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisilazane and / or 1,3-divinyl-1,3-dimethyl-1,3-diphenyldisilane.

6. A silicone hose kit according to claim 3, wherein: The hydroxyl-containing silane is N-(2-hydroxyethyl)-N,N-bis(trimethoxysilylpropyl)amine.

7. A silicone hose kit according to claim 3, wherein: The filler reinforcing agent is composed of fumed silica and glass fiber powder.

8. A silicone hose kit according to claim 3, wherein: The silicone rubber masterbatch is prepared by the following method: According to the parts by weight, weigh the filler reinforcing agent and the modifier and mix them evenly to obtain a mixture A for standby; weigh the vinyl silicone rubber raw rubber, hydroxyl silicone oil, and methyl silicone oil, start heating at 1 - 3 °C / min, and add the mixture A in batches. After all are mixed evenly, raise the temperature to 165 - 175 °C and react for 2 - 4 h, cool to 45 - 55 °C, discharge, mill the rubber, and filter to obtain the silicone rubber masterbatch.

9. A method for preparing a silicone hose kit according to any one of claims 1-8, characterized in that, It includes the following steps: 1) Extrude the uncured fluororubber and cure and shape it to obtain the first fluororubber layer; 2) Coat the silicone rubber solution on the first fluororubber layer and conduct preliminary vulcanization to obtain the first incompletely vulcanized silicone layer; 3) Weave a skeleton material layer on the surface of the first incompletely vulcanized silicone layer; then coat a silicone rubber layer on the skeleton material layer and vulcanize and shape it to form the first silicone layer and the second silicone layer; 4) Extrude the uncured fluororubber and make it cover the surface of the second silicone layer and cure and shape it to form the second fluorosilicone layer; 5) Wind steel wires on the surface of the second fluorosilicone layer to form a steel wire layer to obtain the tube body; 6) Install flanges at both ends of the tube body to obtain a silicone hose kit.

10. Application of a silicone hose kit, characterized in that: This silicone hose kit is applied to the strengthener of a deep-sea diving motor, and this silicone hose kit is a silicone hose kit according to any one of claims 1 - 8.

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