Cold-resistant and high-temperature-resistant rubber material for hydraulic hose and preparation method thereof

Abstract

The invention discloses a cold-resistant high-temperature-resistant hydraulic hose rubber material which comprises the following components in parts by mass: 65-75 parts of nitrile rubber, 5-15 parts of butadiene rubber, 5-10 parts of silicone rubber, 5-10 parts of ethylene propylene rubber, 5-10 parts of hydrogenated nitrile rubber, 10-15 parts of white carbon black VN3, 110-130 parts of carbon black N762, 5-8 parts of a plasticizer DOS, 5-8 parts of a plasticizer TP-90B, 3-5 parts of zinc oxide, 0.5-1.0 part of stearic acid, 1-2 parts of an anti-aging agent KY-405 and 1-2 parts of an anti-aging agent RD. The invention relates to an environment-friendly adhesive which is prepared from the following components in parts by weight: 0.5 to 1.0 part of microcrystalline wax Antilux 654, 3 to 5 parts of homogeneous resin 40MSF, 1.5 to 2.5 parts of sulfur, 1.0 to 1.5 parts of accelerant CZ, 1.5 to 2.5 parts of peroxide F40P-SP2, 0.5 to 1.0 part of assistant cross-linking agent SK8911D70 and 5 to 7 parts of Ricobond 1731HS. The material has excellent low-temperature bending property (less than or equal to-60 DEG C), hot oil resistance, thermal aging resistance and copper-plated steel wire bonding property, and is suitable for hydraulic hose manufacturing in an extreme environment.

Description

Technical Field

[0001] This invention relates to the field of rubber materials technology, specifically to a cold- and high-temperature resistant rubber material for hydraulic hoses and its preparation method, which is suitable for manufacturing hydraulic hoses used in extreme environments. Background Technology

[0002] Hydraulic hoses are key components for transporting high-pressure fluids in equipment such as construction machinery, mining equipment, and marine hydraulic systems. Their typical structure includes an inner rubber layer, a reinforcing layer (such as a copper-plated steel wire braided layer or spiral wound layer), and an outer rubber layer. The inner rubber layer directly contacts the hydraulic oil and bears the pressure; its performance directly determines the hose's service life and safety.

[0003] Traditional hydraulic hoses are mostly made of nitrile rubber (NBR) for their inner rubber layer. While they have good oil resistance, they have significant drawbacks: 1) Their low-temperature resistance is typically only around -40°C. In cold regions or during winter field operations, the hoses are prone to hardening and embrittlement, leading to bending, cracking, or bursting, which can cause serious safety accidents. 2) Their high-temperature resistance is limited. When used for extended periods in hot oil environments above 100°C, they are prone to hardening and cracking, resulting in a sharp decline in their physical and mechanical properties.

[0004] To address the low-temperature resistance issue, some existing technologies employ the addition of large amounts of plasticizers, but this sacrifices the material's strength, oil resistance, and pull-out resistance. Others have attempted to use silicone rubber, but it suffers from low strength, poor oil resistance, and difficulty in bonding with steel wire. To address the high-temperature resistance issue, some technologies utilize expensive fluororubber or fully hydrogenated nitrile rubber, but this significantly increases material costs and offers limited improvement in low-temperature performance.

[0005] Therefore, there is an urgent need in this field to develop a new type of rubber material that can simultaneously achieve excellent resistance to ultra-low temperatures (≤-60℃), excellent resistance to high-temperature hot oil and anti-aging properties, good physical and mechanical strength, and high adhesion strength to the copper-plated steel wire skeleton layer, while keeping costs under control. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rubber material for cold and high temperature resistant hydraulic hoses. This material achieves a balance between resistance to ultra-low temperatures, resistance to high temperature oils, anti-aging properties, and high adhesion through a molecular design that combines multiple rubbers with specific reinforcing, plasticizing, and vulcanizing systems, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a rubber material for cold- and high-temperature resistant hydraulic hoses, comprising the following components by weight:

[0008] 65-75 parts of nitrile rubber,

[0009] 5-15 parts of butadiene rubber,

[0010] 5-10 parts silicone rubber

[0011] 5-10 parts of ethylene propylene rubber,

[0012] 5-10 parts of hydrogenated nitrile butadiene rubber,

[0013] 10-15 parts of precipitated silica VN3

[0014] Carbon black N762 110-130 parts

[0015] Plasticizer DOS 5-8 parts,

[0016] Plasticizer TP-90B 5-8 parts,

[0017] 3-5 parts zinc oxide

[0018] Stearic acid 0.5-1.0 parts,

[0019] Anti-aging agent KY-405 1-2 parts,

[0020] Anti-aging agent RD 1-2 parts,

[0021] Antilux 654 microcrystalline wax, 0.5-1.0 parts.

[0022] 3-5 parts of homogeneous resin 40MSF

[0023] Sulfur 1.5-2.5 parts,

[0024] Accelerator CZ 1.0-1.5 parts,

[0025] Peroxide F40P-SP2 1.5-2.5 parts,

[0026] Crosslinking agent SK8911D70, 0.5-1.0 parts.

[0027] Ricobond 1731HS 5-7 servings.

[0028] Furthermore, the nitrile rubber is KNB1845, the butadiene rubber is CB-24, the ethylene propylene rubber is 9950C, the silicone rubber is MPVQ1201, and the hydrogenated nitrile rubber is Therban C3467.

[0029] Furthermore, its composition is as follows: 65 parts nitrile rubber, 10 parts butadiene rubber, 10 parts silicone rubber, 10 parts ethylene propylene rubber, 5 parts hydrogenated nitrile rubber, 15 parts precipitated silica VN3, 110 parts carbon black N762, 5 parts plasticizer DOS, 7 parts TP-90B, 3 parts zinc oxide, 0.5 parts stearic acid, 1 part antioxidant KY-405, 1.75 parts RD, 0.6 parts microcrystalline wax, 3 parts homogeneous resin, 1.5 parts sulfur, 1.5 parts accelerator CZ, 1.5 parts peroxide, 1.0 part co-crosslinking agent, and 5.0 parts Ricobond.

[0030] Furthermore, its composition is as follows: 70 parts nitrile rubber, 5 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 115 parts carbon black, 7 parts DOS, 6.5 parts TP-90B, 5 parts zinc oxide, 1.0 part stearic acid, 2 parts KY-405, 2 parts RD, 0.5 parts microcrystalline wax, 4 parts resin, 2.0 parts sulfur, 1.25 parts CZ, 2.5 parts peroxide, 0.8 parts co-crosslinking agent, and 7.0 parts Ricobond.

[0031] Furthermore, its composition is as follows: 73 parts nitrile rubber, 10 parts butadiene rubber, 5 parts silicone rubber, 5 parts ethylene propylene rubber, 7 parts hydrogenated nitrile rubber, 12 parts silica, 130 parts carbon black, 8 parts DOS, 8 parts TP-90B, 3.5 parts zinc oxide, 0.75 parts stearic acid, 1.5 parts KY-405, 1 part RD, 1.0 part microcrystalline wax, 5.0 parts resin, 2.5 parts sulfur, 1.0 part CZ, 2.0 parts peroxide, 0.6 parts co-crosslinking agent, and 6.0 parts Ricobond.

[0032] Furthermore, its composition is as follows: 60 parts nitrile rubber, 15 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 120 parts carbon black, 8 parts DOS, 5 parts TP-90B, 4 parts zinc oxide, 0.5 parts stearic acid, 2.0 parts KY-405, 1.5 parts RD, 0.75 parts microcrystalline wax, 4.0 parts resin, 2.0 parts sulfur, 1.0 part CZ, 2.25 parts peroxide, 0.5 parts co-crosslinking agent, and 5.0 parts Ricobond.

[0033] Furthermore, its components also include nano-montmorillonite, in parts by weight of 2-5.

[0034] Furthermore, the nano-montmorillonite is nano-montmorillonite that has undergone surface treatment using a silane coupling agent.

[0035] The present invention also provides a method for preparing a rubber material for cold-resistant and high-temperature-resistant hydraulic hoses as described in any of the above claims, comprising the following steps:

[0036] a) First stage of compounding: Nitrile rubber, butadiene rubber, silicone rubber, ethylene propylene rubber and hydrogenated nitrile rubber are put into an internal mixer and mixed for 300 seconds. After feeding, the mixture is left to stand for no less than 24 hours.

[0037] b) First stage of mixing: Put the compounded rubber into the internal mixer and mix for 60 seconds. Then add zinc oxide, stearic acid, antioxidant, microcrystalline wax and homogenized resin, and continue mixing for 60 seconds.

[0038] c) Add silica, carbon black and plasticizer, mix for 90 seconds, then remove the plug and clean, continue mixing for 120 seconds and then sheet.

[0039] d) Second stage of mixing: Add sulfur, accelerator, peroxide and crosslinking agent, mix until evenly dispersed and then discharge the adhesive.

[0040] Furthermore, in step d), the mixing temperature is controlled at 80~100℃.

[0041] The working principle and beneficial effects of this invention are as follows:

[0042] 1. Rubber System Design: The system primarily uses nitrile butadiene rubber (NBR) to provide basic oil resistance; butadiene rubber (BR) significantly improves the low-temperature brittleness and elasticity of the compound; silicone rubber (MVQ) and ethylene propylene diene monomer (EPDM) greatly enhance high and low temperature resistance and aging resistance; and hydrogenated nitrile butadiene rubber (HNBR) further strengthens heat resistance while maintaining oil resistance. These five rubbers form a "sea-island" structure or interpenetrating network at the microscopic level, achieving complementary performance advantages.

[0043] 2. Reinforcing and Plasticizing System: A combination of precipitated silica VN3 and carbon black N762 is used. N762 is a medium-particle thermal cracking carbon black, providing good processability and moderate reinforcement, avoiding the hardening of the rubber compound caused by the use of high-structure carbon black. Precipitated silica helps improve the tear resistance and dynamic fatigue properties of the rubber compound, and works synergistically with plasticizers to improve low-temperature performance. DOS (dioctyl sebacate) and TP-90B are selected as composite plasticizers. DOS is a recognized excellent cold-resistant plasticizer, while TP-90B has both plasticizing and some tackifying effects. The combination of the two ensures flexibility at -60℃ and is not easily extracted by hydraulic oil.

[0044] 2. Vulcanization System: A composite vulcanization system using sulfur / accelerator CZ and peroxide F40P-SP2 is employed, supplemented with crosslinking agent SK8911D70. This system can form mixed crosslinking bonds (polysulfide bonds and carbon-carbon bonds), enabling the vulcanized rubber network to maintain a certain degree of flexibility (beneficial for low-temperature performance) while also possessing higher thermal stability (beneficial for heat aging resistance).

[0045] 3. Adhesion System: Ricobond 1731HS is specially added. This is a metamethyl methacrylate adhesive promoter that can significantly improve the adhesion strength and adhesion durability between the adhesive and the copper-plated steel wire, ensuring that the reinforcement layer and the adhesive layer of the hydraulic hose do not detach under dynamic pressure pulses.

[0046] Through the synergistic effect of the above components, this material perfectly solves the technical problems of existing technologies that cannot simultaneously address ultra-low temperature, high temperature oil, aging, and adhesion, making it particularly suitable for manufacturing cold-resistant, high-temperature, and high-pressure hydraulic hoses for mining hydraulic supports, engineering machinery, and other fields. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] A rubber material for cold- and high-temperature resistant hydraulic hoses comprises the following components by weight:

[0049] 65-75 parts of nitrile rubber,

[0050] 5-15 parts of butadiene rubber,

[0051] 5-10 parts silicone rubber

[0052] 5-10 parts of ethylene propylene rubber,

[0053] 5-10 parts of hydrogenated nitrile butadiene rubber,

[0054] 10-15 parts of precipitated silica VN3

[0055] Carbon black N762 110-130 parts

[0056] Plasticizer DOS 5-8 parts,

[0057] Plasticizer TP-90B 5-8 parts,

[0058] 3-5 parts zinc oxide

[0059] Stearic acid 0.5-1.0 parts,

[0060] Anti-aging agent KY-405 1-2 parts,

[0061] Anti-aging agent RD 1-2 parts,

[0062] Antilux 654 microcrystalline wax, 0.5-1.0 parts.

[0063] 3-5 parts of homogeneous resin 40MSF

[0064] Sulfur 1.5-2.5 parts,

[0065] Accelerator CZ 1.0-1.5 parts,

[0066] Peroxide F40P-SP2 1.5-2.5 parts,

[0067] Crosslinking agent SK8911D70, 0.5-1.0 parts.

[0068] Ricobond 1731HS 5-7 servings.

[0069] Furthermore, the nitrile rubber is KNB1845, the butadiene rubber is CB-24, the ethylene propylene rubber is 9950C, the silicone rubber is MPVQ1201, and the hydrogenated nitrile rubber is Therban C3467.

[0070] Furthermore, its composition is as follows: 65 parts nitrile rubber, 10 parts butadiene rubber, 10 parts silicone rubber, 10 parts ethylene propylene rubber, 5 parts hydrogenated nitrile rubber, 15 parts precipitated silica VN3, 110 parts carbon black N762, 5 parts plasticizer DOS, 7 parts TP-90B, 3 parts zinc oxide, 0.5 parts stearic acid, 1 part antioxidant KY-405, 1.75 parts RD, 0.6 parts microcrystalline wax, 3 parts homogeneous resin, 1.5 parts sulfur, 1.5 parts accelerator CZ, 1.5 parts peroxide, 1.0 part co-crosslinking agent, and 5.0 parts Ricobond.

[0071] Furthermore, its composition is as follows: 70 parts nitrile rubber, 5 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 115 parts carbon black, 7 parts DOS, 6.5 parts TP-90B, 5 parts zinc oxide, 1.0 part stearic acid, 2 parts KY-405, 2 parts RD, 0.5 parts microcrystalline wax, 4 parts resin, 2.0 parts sulfur, 1.25 parts CZ, 2.5 parts peroxide, 0.8 parts co-crosslinking agent, and 7.0 parts Ricobond.

[0072] Furthermore, its composition is as follows: 73 parts nitrile rubber, 10 parts butadiene rubber, 5 parts silicone rubber, 5 parts ethylene propylene rubber, 7 parts hydrogenated nitrile rubber, 12 parts silica, 130 parts carbon black, 8 parts DOS, 8 parts TP-90B, 3.5 parts zinc oxide, 0.75 parts stearic acid, 1.5 parts KY-405, 1 part RD, 1.0 part microcrystalline wax, 5.0 parts resin, 2.5 parts sulfur, 1.0 part CZ, 2.0 parts peroxide, 0.6 parts co-crosslinking agent, and 6.0 parts Ricobond.

[0073] Furthermore, its composition is as follows: 60 parts nitrile rubber, 15 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 120 parts carbon black, 8 parts DOS, 5 parts TP-90B, 4 parts zinc oxide, 0.5 parts stearic acid, 2.0 parts KY-405, 1.5 parts RD, 0.75 parts microcrystalline wax, 4.0 parts resin, 2.0 parts sulfur, 1.0 part CZ, 2.25 parts peroxide, 0.5 parts co-crosslinking agent, and 5.0 parts Ricobond.

[0074] Furthermore, its components also include nano-montmorillonite, in parts by weight of 2-5.

[0075] Furthermore, the nano-montmorillonite is nano-montmorillonite that has undergone surface treatment using a silane coupling agent.

[0076] The present invention also provides a method for preparing a rubber material for cold-resistant and high-temperature-resistant hydraulic hoses as described in any of the above claims, comprising the following steps:

[0077] a) First stage of compounding: Nitrile rubber, butadiene rubber, silicone rubber, ethylene propylene rubber and hydrogenated nitrile rubber are put into an internal mixer and mixed for 300 seconds. After feeding, the mixture is left to stand for no less than 24 hours.

[0078] b) First stage of mixing: Put the compounded rubber into the internal mixer and mix for 60 seconds. Then add zinc oxide, stearic acid, antioxidant, microcrystalline wax and homogenized resin, and continue mixing for 60 seconds.

[0079] c) Add silica, carbon black and plasticizer, mix for 90 seconds, then remove the plug and clean, continue mixing for 120 seconds and then sheet.

[0080] d) Second stage of mixing: Add sulfur, accelerator, peroxide and crosslinking agent, mix until evenly dispersed and then discharge the adhesive.

[0081] Furthermore, in step d), the mixing temperature is controlled at 80~100℃.

[0082] The present invention will be further described in detail below with reference to embodiments, but the embodiments of the present invention are not limited thereto. In the following embodiments, all raw material components, unless otherwise specified, are commercially available products commonly used in the rubber industry.

[0083] Examples 1-4 describe the preparation of the rubber materials of the present invention according to the formulation ratios (parts by mass) shown in Table 1.

[0084] Table 1: Formulation Table for Examples 1-4 (Unit: Parts by Mass)

[0085]

[0086] Preparation method: The preparation method shall be strictly followed as described in the foregoing invention description:

[0087] 1. First stage of compounding: The internal mixer is initially heated to 50℃ and rotated at 40rpm. After mixing for 300 seconds, the glue is discharged and the sheets are left to stand at room temperature for 24 hours.

[0088] 2. First stage of mixing: The initial temperature of the internal mixer is 50℃. Add the compound rubber and mix for 60 seconds; add the minor ingredients (zinc oxide, stearic acid, antioxidant, microcrystalline wax, resin) and mix for 60 seconds; add the fillers and plasticizers (silica, carbon black, DOS, TP-90B) and mix for 90 seconds. Clean the mixture by lifting the plug and mix for another 120 seconds. Control the discharge temperature at 115±5℃ and then sheet and cool.

[0089] 3. Second stage of mixing: On the open mill (roller temperature 60℃), wrap the masterbatch around the rollers and add sulfur, accelerator CZ, peroxide, crosslinking agent and Ricobond 1731HS in sequence. Cut the left and right sides 5 times each, and make triangular wraps 5 times to ensure uniform dispersion. Then, pass through the thin sheet.

[0090] The obtained rubber compound was subjected to flat vulcanization at 160℃ according to its positive vulcanization time (T90) to obtain standard samples for performance testing. The test results are shown in Table 2.

[0091] Table 2: Performance Test Results of Examples 1-4

[0092]

[0093] As shown in Table 2, all embodiments of the present invention have fully met the expected technical indicators, and a rubber material for hydraulic hoses with extremely excellent comprehensive performance has been successfully obtained.

[0094] Comparative example:

[0095] A comparative test was conducted using a common nitrile rubber formulation (100 parts NBR, 60 parts carbon black N550, 15 parts plasticizer DOP, and a sulfur vulcanization system). The low-temperature bending temperature was only -35℃, the tensile strength decreased by more than 45% after 72 hours of heat aging at 125℃, and the elongation decreased by more than 60% after 168 hours of oil resistance at 125℃, which could not meet the requirements of extreme working conditions.

[0096] The working principle and beneficial effects of this invention are as follows:

[0097] 1. Rubber System Design: The system primarily uses nitrile butadiene rubber (NBR) to provide basic oil resistance; butadiene rubber (BR) significantly improves the low-temperature brittleness and elasticity of the compound; silicone rubber (MVQ) and ethylene propylene diene monomer (EPDM) greatly enhance high and low temperature resistance and aging resistance; and hydrogenated nitrile butadiene rubber (HNBR) further strengthens heat resistance while maintaining oil resistance. These five rubbers form a "sea-island" structure or interpenetrating network at the microscopic level, achieving complementary performance advantages.

[0098] 2. Reinforcing and Plasticizing System: A combination of precipitated silica VN3 and carbon black N762 is used. N762 is a medium-particle thermal cracking carbon black, providing good processability and moderate reinforcement, avoiding the hardening of the rubber compound caused by the use of high-structure carbon black. Precipitated silica helps improve the tear resistance and dynamic fatigue properties of the rubber compound, and works synergistically with plasticizers to improve low-temperature performance. DOS (dioctyl sebacate) and TP-90B are selected as composite plasticizers. DOS is a recognized excellent cold-resistant plasticizer, while TP-90B has both plasticizing and some tackifying effects. The combination of the two ensures flexibility at -60℃ and is not easily extracted by hydraulic oil.

[0099] 2. Vulcanization System: A composite vulcanization system using sulfur / accelerator CZ and peroxide F40P-SP2 is employed, supplemented with crosslinking agent SK8911D70. This system can form mixed crosslinking bonds (polysulfide bonds and carbon-carbon bonds), enabling the vulcanized rubber network to maintain a certain degree of flexibility (beneficial for low-temperature performance) while also possessing higher thermal stability (beneficial for heat aging resistance).

[0100] 3. Adhesion System: Ricobond 1731HS is specially added. This is a metamethyl methacrylate adhesive promoter that can significantly improve the adhesion strength and adhesion durability between the adhesive and the copper-plated steel wire, ensuring that the reinforcement layer and the adhesive layer of the hydraulic hose do not detach under dynamic pressure pulses.

[0101] Through the synergistic effect of the above components, the rubber material prepared by this invention exhibits the following comprehensive properties: hardness (Shore A): 80±5; tensile strength: ≥11 MPa; elongation at break: ≥150%; low-temperature bending temperature: ≤-60℃; hot air aging (125℃×72h): hardness change ≤±10, tensile strength change rate ≥-30%, elongation at break change rate ≥-50%; hydraulic oil resistance (125℃×168h): hardness change ≤±10, tensile strength change rate ≥-30%, elongation at break change rate ≥-40%; high adhesion strength with copper-plated steel wire. This material perfectly solves the technical problems of existing technologies that cannot simultaneously address ultra-low temperature, high-temperature oil, aging, and adhesion, and is particularly suitable for manufacturing cold-resistant, high-temperature, and high-pressure hydraulic hoses for mining hydraulic supports, engineering machinery, and other fields.

[0102] In other embodiments, in the embodiments described above, nano-montmorillonite may be further added in amounts of 2-5 parts by weight. Nano-montmorillonite has excellent reinforcing and barrier properties, which can improve the strength, abrasion resistance, and anti-aging properties of rubber materials, and may further enhance the cold and high temperature resistance of the materials.

[0103] A better option is to surface-treat the nano-montmorillonite with a silane coupling agent before adding it. The silane coupling agent improves the interfacial bonding between the nano-montmorillonite and the rubber matrix, allowing the nano-montmorillonite to be better dispersed in the rubber. Specifically, the nano-montmorillonite and the silane coupling agent are mixed in a certain proportion and reacted for a period of time under appropriate temperature and stirring conditions. Then, the treated nano-montmorillonite is added to the original rubber formulation at a mass ratio of 2-5 parts. This can further improve the strength, abrasion resistance, and anti-aging properties of the rubber material, and may also enhance its cold and high-temperature resistance. Specifically, three different silane coupling agents—γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, and γ-methacryloyloxypropyltrimethoxysilane—are selected and mixed with the nano-montmorillonite in the same proportion, reacted for the same time (e.g., 2 hours) under the same temperature (e.g., 80°C) and stirring conditions (e.g., 200 rpm). Then, the treated nano-montmorillonite was added to the original rubber formulation at 3 parts by weight, and the effects of different silane coupling agents on the strength, abrasion resistance, anti-aging properties, and cold and high-temperature resistance of the rubber material were compared. For example, γ-aminopropyltriethoxysilane was selected as the silane coupling agent to treat the nano-montmorillonite, and the treated nano-montmorillonite was added to the original rubber formulation at 2, 3, 4, and 5 parts by weight, respectively. Rubber materials were prepared under the same processing conditions, and the various properties of the rubber materials, such as strength, abrasion resistance, anti-aging properties, cold and high-temperature resistance, were tested under different addition amounts to determine the optimal amount of nano-montmorillonite added.

[0104] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rubber material for cold- and high-temperature resistant hydraulic hoses, characterized in that, The following components are included by mass parts: 65-75 parts of nitrile rubber, 5-15 parts of butadiene rubber, 5-10 parts silicone rubber 5-10 parts of ethylene propylene rubber, 5-10 parts of hydrogenated nitrile butadiene rubber, 10-15 parts of precipitated silica VN3 Carbon black N762 110-130 parts Plasticizer DOS 5-8 parts, Plasticizer TP-90B 5-8 parts, 3-5 parts zinc oxide Stearic acid 0.5-1.0 parts, Anti-aging agent KY-405 1-2 parts, Anti-aging agent RD 1-2 parts, Antilux 654 microcrystalline wax, 0.5-1.0 parts. 3-5 parts of homogeneous resin 40MSF Sulfur 1.5-2.5 parts, Accelerator CZ 1.0-1.5 parts, Peroxide F40P-SP2 1.5-2.5 parts, Crosslinking agent SK8911D70, 0.5-1.0 parts. Ricobond 1731HS 5-7 servings.

2. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 1, characterized in that, The nitrile rubber is KNB1845, the butadiene rubber is CB-24, the ethylene propylene rubber is 9950C, the silicone rubber is MPVQ1201, and the hydrogenated nitrile rubber is Therban C3467.

3. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 2, characterized in that, Its composition is as follows: 65 parts nitrile rubber, 10 parts butadiene rubber, 10 parts silicone rubber, 10 parts ethylene propylene rubber, 5 parts hydrogenated nitrile rubber, 15 parts precipitated silica VN3, 110 parts carbon black N762, 5 parts plasticizer DOS, 7 parts TP-90B, 3 parts zinc oxide, 0.5 parts stearic acid, 1 part antioxidant KY-405, 1.75 parts RD, 0.6 parts microcrystalline wax, 3 parts homogeneous resin, 1.5 parts sulfur, 1.5 parts accelerator CZ, 1.5 parts peroxide, 1.0 part co-crosslinking agent, and 5.0 parts Ricobond.

4. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 2, characterized in that, Its composition is as follows: 70 parts nitrile rubber, 5 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 115 parts carbon black, 7 parts DOS, 6.5 parts TP-90B, 5 parts zinc oxide, 1.0 part stearic acid, 2 parts KY-405, 2 parts RD, 0.5 parts microcrystalline wax, 4 parts resin, 2.0 parts sulfur, 1.25 parts CZ, 2.5 parts peroxide, 0.8 parts co-crosslinking agent, and 7.0 parts Ricobond.

5. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 2, characterized in that, Its composition is as follows: 73 parts nitrile rubber, 10 parts butadiene rubber, 5 parts silicone rubber, 5 parts ethylene propylene rubber, 7 parts hydrogenated nitrile rubber, 12 parts silica, 130 parts carbon black, 8 parts DOS, 8 parts TP-90B, 3.5 parts zinc oxide, 0.75 parts stearic acid, 1.5 parts KY-405, 1 part RD, 1.0 part microcrystalline wax, 5.0 parts resin, 2.5 parts sulfur, 1.0 part CZ, 2.0 parts peroxide, 0.6 parts co-crosslinking agent, and 6.0 parts Ricobond.

6. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 2, characterized in that, Its composition is as follows: 60 parts nitrile rubber, 15 parts butadiene rubber, 5 parts silicone rubber, 10 parts ethylene propylene rubber, 10 parts hydrogenated nitrile rubber, 10 parts silica, 120 parts carbon black, 8 parts DOS, 5 parts TP-90B, 4 parts zinc oxide, 0.5 parts stearic acid, 2.0 parts KY-405, 1.5 parts RD, 0.75 parts microcrystalline wax, 4.0 parts resin, 2.0 parts sulfur, 1.0 part CZ, 2.25 parts peroxide, 0.5 parts co-crosslinking agent, and 5.0 parts Ricobond.

7. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to any one of claims 1-6, characterized in that, Its components also include nano-montmorillonite, in parts by weight of 2-5.

8. The rubber material for cold-resistant and high-temperature-resistant hydraulic hoses according to claim 7, characterized in that, The nano-montmorillonite is nano-montmorillonite that has undergone surface treatment with a silane coupling agent.

9. A method for preparing a rubber material for cold-resistant and high-temperature-resistant hydraulic hoses as described in any one of claims 1-8, characterized in that, Includes the following steps: a) First stage of compounding: Nitrile rubber, butadiene rubber, silicone rubber, ethylene propylene rubber and hydrogenated nitrile rubber are put into an internal mixer and mixed for 300 seconds. After feeding, the mixture is left to stand for no less than 24 hours. b) First stage of mixing: Put the compounded rubber into the internal mixer and mix for 60 seconds. Then add zinc oxide, stearic acid, antioxidant, microcrystalline wax and homogenized resin, and continue mixing for 60 seconds. c) Add silica, carbon black and plasticizer, mix for 90 seconds, then remove the plug and clean, continue mixing for 120 seconds and then sheet. d) Second stage of mixing: Add sulfur, accelerator, peroxide and crosslinking agent, mix until evenly dispersed and then discharge the adhesive.

10. The method according to claim 7, characterized in that, In step d), the mixing temperature is controlled at 80~100℃.

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