Acrylate rubber material and component

Abstract

The invention relates to an acrylate rubber material and a component, and belongs to the technical field of automobile sealing parts. The acrylate rubber material comprises an acrylate material, a modifier and an auxiliary agent, wherein the acrylate material comprises at least two kinds of acrylate; the modifier has a core-shell structure, the core of the modifier comprises nano SiO2, and the shell layer of the modifier comprises acrylate; according to the present invention, at least two acrylic esters are adopted as the raw materials, such that the acrylic ester rubber material product has the small extrusion expansion rate, and has the good mechanical property after the vulcanization. Meanwhile, a nano SiO2 / acrylate core-shell structure material is adopted as a modifier, and the components are added into the rubber formula, so that the fluidity and the extrusion expansion rate of the rubber material can be effectively improved on the basis of keeping good mechanical properties.

Description

Technical Field

[0001] The present application relates to the technical field of automobile seals, and in particular to an acrylic rubber material and component. Background Art

[0002] Acrylic (ACM) rubber is a special rubber with excellent heat resistance, oil resistance and weather resistance. In the automotive industry, acrylic rubber is often used in hoses and seals that come into contact with transmission oil or engine oil in transmission and engine systems. However, there are still some problems with the production of acrylic rubber. For example: 1. The fluidity of acrylic rubber is poor and it is difficult to extrude. Adding plasticizers can improve fluidity, but it will cause a significant decrease in the performance of the rubber. 2. The extrusion expansion rate of acrylic rubber is large. When the hose is extruded, especially when the hose with a smaller wall thickness is extruded, it is easy to have a wall thickness tolerance. Most of the hoses used for acrylics are used to transmit various oil media under high temperature and pressure. Excessive wall thickness tolerance can easily cause medium leakage. Summary of the invention

[0003] The present application provides an acrylic rubber material and a component to improve the problem of large extrusion expansion rate of acrylic rubber.

[0004] In a first aspect, the present application provides an acrylate rubber material, which includes: an acrylate material, a modifier and an additive; wherein the acrylate material includes at least two acrylates; the modifier has a core-shell structure, the core of the modifier includes nano-SiO2, and the shell of the modifier includes acrylate.

[0005] As an optional embodiment, the number average molecular weight Mn0 of the acrylate material is ≥ 200000; and / or

[0006] The relationship between the number average molecular weight Mn0 and the weight average molecular weight Mw0 of the acrylic ester material satisfies: Mw0 / Mn0≤8.

[0007] As an optional implementation, the acrylate material includes a first acrylate material and a second acrylate material.

[0008] As an optional embodiment, the number average molecular weight Mn1 of the first acrylate material satisfies: 300000≤Mn1≤500000; and / or

[0009] The relationship between the number average molecular weight Mn1 and the weight average molecular weight Mw1 of the first acrylate material satisfies: Mw1 / Mn1≤4.8; and / or

[0010] The number average molecular weight Mn2 of the second acrylate material satisfies: 100000≤Mn2≤200000; and / or

[0011] The relationship between the number average molecular weight Mn2 and the weight average molecular weight Mw2 of the second acrylate material satisfies: 5≤Mw2 / Mn2≤7.

[0012] As an optional embodiment, the preparation method of the modifier includes:

[0013] Dispersing nano-SiO2 modified by silane coupling agent and n-hexadecane in a mixed monomer solution of ethyl acrylate and butyl acrylate to obtain a mixed solution;

[0014] The mixed solution is reacted with sodium dodecyl sulfate to obtain a modifier.

[0015] As an optional embodiment, the reaction temperature is 70°C to 80°C; and / or

[0016] The reaction time is 4h to 6h.

[0017] As an optional embodiment, the auxiliary agent includes a reinforcing agent, a plasticizer, a vulcanizing agent, a vulcanization auxiliary agent, an antioxidant, stearic acid and octadecylamine.

[0018] As an optional embodiment, the reinforcing agent includes carbon black; and / or

[0019] Plasticizers include RS735; and / or

[0020] The vulcanizing agent includes a 1# vulcanizing agent; and / or

[0021] Vulcanization aids include DOTG-75; and / or

[0022] The antioxidant includes antioxidant 445.

[0023] As an optional embodiment, in the acrylic rubber material, 10 to 30 parts by mass of a modifier are added per 100 parts by mass of the acrylic material; and / or

[0024] In the acrylic rubber material, 50 to 70 parts by weight of a reinforcing agent is added per 100 parts by weight of the acrylic rubber material; and / or

[0025] In the acrylic rubber material, 1 to 10 parts by mass of a plasticizer is added per 100 parts by mass of the acrylic rubber material; and / or

[0026] In the acrylic rubber material, 0.2 to 1.5 parts by mass of a vulcanizing agent is added per 100 parts by mass of the acrylic rubber material; and / or

[0027] In the acrylic rubber material, 1 to 5 parts by weight of a vulcanization aid is added per 100 parts by weight of the acrylic rubber material; and / or

[0028] In the acrylic rubber material, 0.5 to 5 parts by weight of an antioxidant is added per 100 parts by weight of the acrylic rubber material; and / or

[0029] In the acrylic rubber material, 0.2 to 2 parts by mass of stearic acid is added per 100 parts by mass of the acrylic rubber material; and / or

[0030] The acrylic rubber material contains 0.2 to 1 parts by mass of octadecylamine per 100 parts by mass of the acrylic rubber material.

[0031] In a second aspect, the present application provides a component, the material of the component includes the acrylic rubber material provided in the first aspect.

[0032] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0033] The acrylate rubber material provided in the embodiment of the present application uses at least two acrylates as raw materials, so that the acrylate rubber material product has a small extrusion expansion rate and has good mechanical properties after vulcanization. At the same time, by using nano-SiO2 / acrylate core-shell structure material as a modifier, this component is added to the rubber formula to effectively improve the fluidity and extrusion expansion rate of the rubber while maintaining good mechanical properties. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0036] An embodiment of the present application provides an acrylate rubber material, which includes: an acrylate material, a modifier and an additive; wherein the acrylate material includes at least two acrylates; the modifier has a core-shell structure, the core of the modifier includes nano-SiO2, and the shell of the modifier includes acrylate.

[0037] The acrylic rubber material adopts at least two acrylic esters as raw materials, so that the acrylic rubber material product has a small extrusion expansion rate and has good mechanical properties after vulcanization. At the same time, by adopting nano-SiO2 / acrylic ester core-shell structure material as a modifier, the component added to the rubber formula can effectively improve the fluidity and extrusion expansion rate of the rubber material while maintaining good mechanical properties. And its effect of maintaining physical properties and improving extrusion expansion rate is significantly better than other additives such as plasticizers.

[0038] In some embodiments, the number average molecular weight Mn0 of the acrylate material is ≥ 200000; the relationship between the number average molecular weight Mn0 and the weight average molecular weight Mw0 of the acrylate material satisfies: Mw0 / Mn0≤8. By using at least two acrylates as raw materials and controlling the number average molecular weight and molecular weight distribution, the acrylate rubber material product has a smaller extrusion expansion rate and has better mechanical properties after vulcanization.

[0039] Exemplarily, the number average molecular weight Mn0 of the acrylate material can be 200000, 210000, 220000, 230000, 240000, 250000, 260000, 270000, 280000, 290000, 300000, 350000, 400000, 450000, 500000, 550000, 600000 or 650000, etc., which can also be any value in the range of ≥200000. The ratio Mw0 / Mn0 of the number average molecular weight Mn0 and the weight average molecular weight Mw0 of the acrylate material can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5 or 8, etc., which can also be any value in the range of ≤8.

[0040] In some embodiments, the acrylate material includes a first acrylate material and a second acrylate material. Further, the number average molecular weight Mn1 of the first acrylate material satisfies: 300000≤Mn1≤500000; the relationship between the number average molecular weight Mn1 and the weight average molecular weight Mw1 of the first acrylate material satisfies: Mw1 / Mn1≤4.8; the number average molecular weight Mn2 of the second acrylate material satisfies: 100000≤Mn2≤200000; the relationship between the number average molecular weight Mn2 and the weight average molecular weight Mw2 of the second acrylate material satisfies: 5≤Mw2 / Mn2≤7. By regulating the molecular weight relationship between the first acrylate material and the second acrylate material, the molecular weight of the acrylate material can be adjusted to meet the above requirements.

[0041] Illustratively, the number average molecular weight Mn1 of the first acrylate material can be 300,000, 310,000, 320,000, 330,000, 340,000, 350,000, 360,000, 370,000, 380,000, 390,000, 400,000, 410,000, 420,000, 430,000, 440,000, 450,000, 460,000, 470,000, 480,000, 490,000 or 500,000, etc., and it can also be any value within the range of 300,000 to 500,000. The ratio Mw1 / Mn1 of the number average molecular weight Mn1 and the weight average molecular weight Mw1 of the first acrylate material can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 4.8, etc., and can also be any value within the range of ≤4.8. The number average molecular weight Mn2 of the second acrylate material can be 100000, 110000, 120000, 130000, 140000, 150000, 160000, 170000, 180000, 190000 or 200000, etc., and can also be any value within the range of 100000 to 200000. The ratio Mw2 / Mn2 of the number average molecular weight Mn2 and the weight average molecular weight Mw2 of the second acrylate material can be 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9 or 7, etc., and it can also be any value in the range of 5 to 7.

[0042] In some embodiments, the preparation method of the modifier can be: dispersing nano-SiO2 modified by a silane coupling agent and n-hexadecane in a mixed monomer solution of ethyl acrylate and butyl acrylate to obtain a mixed solution; then reacting the mixed solution with sodium dodecyl sulfate to obtain the modifier. The reaction temperature is 70°C to 80°C; and the reaction time is 4h to 6h.

[0043] Specifically, in this embodiment, the preparation process of the modifier can be: adding nano-SiO2 modified by silane coupling agent and n-hexadecane to a mixed monomer of ethyl acrylate and butyl acrylate, ultrasonically dispersing the mixed monomer, and then blending it with water dissolved with sodium dodecyl sulfate, emulsifying it with an emulsifier and then ultrasonically treating it to enhance the dispersion of nano-SiO2 to obtain the modifier.

[0044] The reaction emulsion is heated to 75°C and reacted for 5 hours. The latex is then diluted with water, and then salts are added to break the emulsion. Finally, the product is washed and dried to obtain a nano-SiO2 / acrylate core-shell structure new material.

[0045] In some embodiments, the auxiliary agent includes a reinforcing agent, a plasticizer, a vulcanizing agent, a vulcanizing aid, an antioxidant, stearic acid and octadecylamine. Further, the reinforcing agent includes carbon black; the plasticizer includes RS735; the vulcanizing agent includes 1# vulcanizing agent; the vulcanizing aid includes DOTG-75; and the antioxidant includes antioxidant 445.

[0046] In some embodiments, the components of the acrylic rubber material include, by mass fraction: 100 parts of acrylic material, 20-30 parts of modifier, 50-70 parts of reinforcing agent, 1-10 parts of plasticizer, 0.2-1.5 parts of vulcanizing agent, 1-5 parts of vulcanizing aid, 1-5 parts of antioxidant, 0.5-2 parts of stearic acid, and 0.2-1 part of octadecylamine.

[0047] Exemplarily, the mass fraction of the modifier for every 100 mass fractions of acrylic ester material can be 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30, etc., which can also be any value in the range of 20 to 30. The mass fraction of the reinforcing agent for every 100 mass fractions of acrylic ester material can be 50, 52, 54, 56, 58, 60, 62, 64, 66, 68 or 70, etc., which can also be any value in the range of 50 to 70. The mass fraction of the plasticizer for every 100 mass fractions of acrylic ester material can be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc., which can also be any value in the range of 1 to 10. The mass fraction of the vulcanizing agent combined with each 100 mass fractions of acrylic material can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4 or 1.5, etc., and it can also be any value within the range of 0.2 to 1.5. The mass fraction of the vulcanizing aid combined with each 100 mass fractions of acrylic material can be 1, 2, 3, 4 or 5, etc., and it can also be any value within the range of 1 to 5. The mass fraction of the antioxidant combined with each 100 mass fractions of acrylic material can be 1, 2, 3, 4 or 5, etc., and it can also be any value within the range of 1 to 5. The mass fraction of stearic acid in every 100 mass fractions of acrylate material can be 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2, etc., and can also be any value in the range of 0.5 to 2. The mass fraction of octadecylamine in every 100 mass fractions of acrylate material can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1, etc., and can also be any value in the range of 0.2 to 1.

[0048] Based on a general inventive concept, an embodiment of the present application further provides a component, the material of the component includes the acrylic rubber material provided above.

[0049] The component is realized based on the above-mentioned materials. The specific content of the materials can refer to the above-mentioned embodiments. Since the component adopts part or all of the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0050] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0051] It should be noted that the acrylic acid esters used in the following examples and comparative examples are shown in the following table:

[0052] Raw Rubber source Mn Mw / Mn ACM1 Jiujiang Dewey ACM4211 454875 4.5 ACM2 Jiujiang Dewey ACM2212 126143 6.8 ACM3 Jiujiang Dewey ACM4212 325484 4.8 ACM4 Jiujiang Dewey ACM2211 184685 5.7

[0053] The modifiers used in the following examples and comparative examples are prepared by the following method: adding nano-SiO2 modified by silane coupling agent and n-hexadecane to a mixed monomer of ethyl acrylate and butyl acrylate, subjecting the mixed monomer to ultrasonic dispersion treatment, and then blending with water in which sodium dodecyl sulfate is dissolved, emulsifying with an emulsifier and then ultrasonically treating to enhance the dispersion of nano-SiO2. The reaction emulsion is heated to 75°C and reacted for 5 hours. The latex is then diluted with water, and then salts are added to break the emulsion. Finally, the product is washed and dried to obtain a nano-SiO2 / acrylate core-shell structure new material as a modifier.

[0054] Example 1

[0055] An acrylic rubber material, the raw materials of which include:

[0056]

[0057] The preparation process is as follows:

[0058] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0059] Example 2

[0060] An acrylic rubber material, the raw materials of which include:

[0061]

[0062] The preparation process is as follows:

[0063] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0064] Example 3

[0065] An acrylic rubber material, the raw materials of which include:

[0066]

[0067] The preparation process is as follows:

[0068] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0069] Example 4

[0070] An acrylic rubber material, the raw materials of which include:

[0071]

[0072] The preparation process is as follows:

[0073] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0074] Comparative Example 1

[0075] An acrylic rubber material, the raw materials of which include:

[0076]

[0077]

[0078] The preparation process is as follows:

[0079] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0080] Comparative Example 2

[0081] An acrylic rubber material, the raw materials of which include:

[0082]

[0083] The preparation process is as follows:

[0084] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0085] Comparative Example 3

[0086] An acrylic rubber material, the raw materials of which include:

[0087]

[0088] The preparation process is as follows:

[0089] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0090] Comparative Example 4

[0091] An acrylic rubber material, the raw materials of which include:

[0092]

[0093] The preparation process is as follows:

[0094] Put the acrylic material into the internal mixer for plasticization, the plasticization temperature is 83℃, the time is 1.2min; then add each component (except vulcanizer and accelerator), the internal mixing temperature is 92℃, and the internal mixing time is controlled at 3.3min; stop the machine to clean the powder attached to the internal mixing hammer, and continue to mix in the internal mixing, the internal mixing temperature is 105℃, and the internal mixing time is controlled at 2.3min; the rubber discharge temperature is 115℃, after thin-passing 4 times on the open mixer, add the vulcanizer and accelerator, and use the shear force of the open mixer roller on the rubber to make the vulcanizer and accelerator melt into the rubber, then make 6 triangle bags, thin-pass the rubber, and perform physical property testing after the sheet is produced. The vulcanization conditions are two-stage vulcanization: first stage: 180℃*10min; second stage: 175℃*240min.

[0095] The main parameter controls of each implementation and comparison are shown in the following table:

[0096]

[0097] Physical properties of each embodiment and comparative example were tested, and the mixed rubber of each embodiment and comparative example was extruded into a rubber hose (rubber hose inner diameter 9mm, thickness 3.5±0.3mm) by an extruder, and the size and burst pressure of the rubber hose were verified. All test and verification results are shown in the table below. The process performance test method is as follows:

[0098] Basic physical properties: GB / T531.1 and GB / T528 are used to measure Shore hardness and tensile properties.

[0099] Extrusion fluidity: Use a capillary rheometer to extrude at a constant pressure of 100 bar and a mold pressure of 80°C to test the apparent viscosity.

[0100] Extrusion expansion rate: A capillary rheometer was used for extrusion at a constant pressure of 100 bar, a die pressure of 80°C, and a piston diameter of 30 mm. The expansion rate of the specimen relative to the die size after extrusion (specimen diameter / die diameter) was tested.

[0101]

[0102]

[0103] From the test results, it can be seen that the apparent viscosity of the rubber material in Comparative Example 1 is large, and the fluidity is poor and cannot be extruded. Comparative Example 2 improves fluidity after adding plasticizer, but the tensile strength decreases significantly and cannot meet the performance requirements of the hose. Comparative Example 3, which selects low molecular weight and low raw rubber, also has this problem. The data of Comparative Example 4 shows that the use of raw rubber combination can maintain a good apparent viscosity and extrusion expansion rate while maintaining certain physical properties.

[0104] The test data of Examples 1-4 show that the tensile properties are slightly improved after adding the modifier and the extrusion fluidity and extrusion expansion rate are significantly improved. The hose extruded from the ACM rubber in the examples meets the size and performance requirements.

[0105] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0106] In the description of the specification of the present application, the terms "include", "comprise", etc. mean "including but not limited to". In this article, relational terms such as "first" and "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A and B can be singular or plural. In this article, "at least one" means one or more, and "plurality" means two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b or c", or "at least one of a, b and c", can both mean: a, b, c, ab (i.e. a and b), ac, bc, or abc, where a, b and c can be single or multiple.

[0107] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An acrylic rubber material, characterized in that: The acrylic rubber material comprises: an acrylic material, a modifier and an auxiliary agent; wherein the acrylic material comprises at least two acrylic esters; the modifier has a core-shell structure, the core of the modifier comprises nano-SiO2, and the shell of the modifier comprises acrylic ester.

2. The acrylic rubber material according to claim 1, characterized in that: The number average molecular weight Mn0 of the acrylic ester material is ≥ 200000; and / or The relationship between the number average molecular weight Mn0 and the weight average molecular weight Mw0 of the acrylic ester material satisfies: Mw0 / Mn0≤8.

3. The acrylic rubber material according to claim 1 or 2, characterized in that: The acrylate material includes a first acrylate material and a second acrylate material.

4. The acrylic rubber material according to claim 3, characterized in that: The number average molecular weight Mn1 of the first acrylate material satisfies: 300000≤Mn1≤500000; and / or The relationship between the number average molecular weight Mn1 and the weight average molecular weight Mw1 of the first acrylate material satisfies: Mw1 / Mn1≤4.8; and / or The number average molecular weight Mn2 of the second acrylate material satisfies: 100000≤Mn2≤200000; and / or The relationship between the number average molecular weight Mn2 and the weight average molecular weight Mw2 of the second acrylate material satisfies: 5≤Mw2 / Mn2≤7.

5. The acrylic rubber material according to claim 1, characterized in that: The preparation method of the modifier comprises: Dispersing nano-SiO2 modified by silane coupling agent and n-hexadecane in a mixed monomer solution of ethyl acrylate and butyl acrylate to obtain a mixed solution; The mixed solution is reacted with sodium dodecyl sulfate to obtain a modifier.

6. The acrylic rubber material according to claim 5, characterized in that: The reaction temperature is 70°C to 80°C; and / or The reaction time is 4 h to 6 h.

7. The acrylic rubber material according to claim 1 or 2, characterized in that: The auxiliary agents include reinforcing agent, plasticizer, vulcanizing agent, vulcanizing auxiliary agent, antioxidant, stearic acid and octadecylamine.

8. The acrylic rubber material according to claim 7, characterized in that: The reinforcing agent comprises carbon black; and / or The plasticizer comprises RS735; and / or The vulcanizing agent includes 1# vulcanizing agent; and / or The vulcanization aid includes DOTG-75; and / or The antioxidant includes antioxidant 445.

9. The acrylic rubber material according to claim 1 or 2, characterized in that: In the acrylic rubber material, 10 to 30 parts by mass of a modifier are added per 100 parts by mass of the acrylic rubber material; and / or In the acrylic rubber material, 50 to 70 parts by weight of a reinforcing agent is added per 100 parts by weight of the acrylic rubber material; and / or In the acrylic rubber material, 1 to 10 parts by mass of a plasticizer is added per 100 parts by mass of the acrylic rubber material; and / or In the acrylic rubber material, 0.2 to 1.5 parts by mass of a vulcanizing agent is added per 100 parts by mass of the acrylic rubber material; and / or In the acrylic rubber material, 1 to 5 parts by mass of a vulcanization aid are added per 100 parts by mass of the acrylic rubber material; and / or In the acrylic rubber material, 0.5 to 5 parts by weight of an antioxidant is added per 100 parts by weight of the acrylic rubber material; and / or In the acrylic rubber material, 0.2 to 2 parts by mass of stearic acid are added per 100 parts by mass of the acrylic rubber material; and / or The acrylic rubber material contains 0.2 to 1 parts by mass of octadecylamine per 100 parts by mass of the acrylic rubber material.

10. A component, characterized in that: The material of the member includes the acrylic rubber material according to any one of claims 1 to 9.

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