Highly heat-conductive oil-resistant acrylate rubber composition and highly heat-conductive oil-resistant acrylate rubber, and preparation method and application thereof

High thermal conductivity and oil-resistant acrylate rubber prepared by specific components and processing methods solves the problem of insufficient oil resistance of existing rubbers at high temperatures, and achieves excellent oil resistance and mechanical properties, making it suitable for applications such as automotive oil seals.

CN117487299BActive Publication Date: 2026-05-01CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-07-26
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing acrylic rubbers are difficult to meet the requirements for oil resistance under high temperature conditions, especially in automotive oil seal materials where they show insufficient performance.

Method used

A high thermal conductivity and oil-resistant acrylate rubber is prepared by using a specific ratio of acrylate rubber, epoxidized rubber, and fluororubber as the base rubber, and compounding it with fillers such as silica, carbon nanotubes, and graphene, and then mixing and vulcanizing it to enhance the molecular chain interaction and filler effect.

Benefits of technology

It improves the high temperature resistance, oil resistance and mechanical properties of rubber, meets the requirements for long-term use at high temperatures, and is suitable for fields such as oil seals.

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Abstract

This invention relates to the field of acrylate rubber technology, and discloses a high thermal conductivity and oil-resistant acrylate rubber composition, a high thermal conductivity and oil-resistant acrylate rubber, its preparation method, and its applications. The composition contains a matrix rubber and fillers, wherein the matrix rubber includes acrylate rubber, epoxidized rubber, and fluororubber, and the fillers include one or more of silica, carbon nanotubes, and graphene; based on 100 parts by weight of the acrylate rubber, the epoxidized rubber comprises 10-30 parts by weight, the fluororubber 10-20 parts by weight, the silica 20-40 parts by weight, the carbon nanotubes 5-20 parts by weight, and the graphene 5-18 parts by weight. This high thermal conductivity and oil-resistant acrylate rubber not only exhibits excellent oil resistance, but the composition also possesses excellent thermal conductivity and mechanical properties.
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Description

Technical Field

[0001] This invention relates to the field of acrylate rubber technology, specifically to a high thermal conductivity and oil-resistant acrylate rubber composition, a high thermal conductivity and oil-resistant acrylate rubber, its preparation method, and its application. Background Technology

[0002] Acrylic rubber is an elastomer obtained by copolymerization of acrylate as the main monomer. Its main chain is a saturated carbon chain, and its side groups are polar ester groups. It possesses excellent heat resistance, aging resistance, oil resistance, ozone resistance, and UV resistance. It is widely used in hot oil environments, especially as an oil seal material in the automotive industry, where it is known as "automotive rubber." However, due to the use of oil seals in some high-temperature applications, existing oil seals are insufficient to meet the requirements for oil resistance.

[0003] Therefore, researching and developing a high thermal conductivity and oil-resistant acrylate rubber composition is of great significance. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing acrylate rubbers in meeting the requirements of high-temperature oil resistance, and to provide a high thermal conductivity and oil resistance acrylate rubber composition, a high thermal conductivity and oil resistance acrylate rubber, its preparation method and application. This high thermal conductivity and oil resistance acrylate rubber not only has excellent oil resistance, but the composition also has excellent thermal conductivity and mechanical properties.

[0005] To achieve the above objectives, a first aspect of the present invention provides a high thermal conductivity and oil-resistant acrylate rubber composition, the composition comprising a matrix rubber and fillers, wherein the matrix rubber includes acrylate rubber, epoxidized rubber, and fluororubber, and the fillers include one or more of silica, carbon nanotubes, and graphene; and based on 100 parts by weight of the acrylate rubber, the epoxidized rubber comprises 10-30 parts by weight, the fluororubber comprises 10-20 parts by weight, the silica comprises 20-40 parts by weight, the carbon nanotubes comprises 5-20 parts by weight, and the graphene comprises 5-18 parts by weight.

[0006] A second aspect of the present invention provides a method for preparing a high thermal conductivity and oil-resistant acrylate rubber using the aforementioned high thermal conductivity and oil-resistant acrylate rubber composition, wherein the method comprises:

[0007] (1) Mix the base rubber and filler and knead to obtain the compound;

[0008] (2) The compound is subjected to a first-stage vulcanization and a second-stage vulcanization treatment in sequence to obtain a high thermal conductivity and oil-resistant acrylate rubber.

[0009] A third aspect of the present invention provides a high thermal conductivity and oil-resistant acrylate rubber prepared by the method described above.

[0010] The fourth aspect of the present invention provides the application of the aforementioned high thermal conductivity and oil-resistant acrylate rubber in one or more of oil seals, gaskets, and hoses.

[0011] Through the above technical solution, the high thermal conductivity and oil resistance acrylate rubber composition provided by the present invention contains specific types and amounts of components, and the components work together synergistically to obtain a high thermal conductivity and oil resistance acrylate rubber with excellent oil resistance, thermal conductivity and mechanical properties. Detailed Implementation

[0012] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0013] As previously stated, the first aspect of this invention provides a high thermal conductivity and oil-resistant acrylate rubber composition, the composition comprising a matrix rubber and fillers, wherein the matrix rubber includes acrylate rubber, epoxidized rubber, and fluororubber, and the fillers include one or more of silica, carbon nanotubes, and graphene; and based on 100 parts by weight of the acrylate rubber, the epoxidized rubber comprises 10-30 parts by weight, the fluororubber comprises 10-20 parts by weight, the silica comprises 20-40 parts by weight, the carbon nanotubes comprises 5-20 parts by weight, and the graphene comprises 5-18 parts by weight.

[0014] The inventors of this invention discovered that by using acrylate rubber, epoxidized rubber, and fluororubber as the matrix rubber components, the co-vulcanization of acrylate rubber, epoxidized rubber, and fluororubber enhances the interaction between rubber molecular chains, causing the molecular chains to intertwine into a network structure, thereby improving the overall performance of the high thermal conductivity and oil resistance acrylate rubber. Furthermore, by using acrylate rubber, epoxidized rubber, and fluororubber as the matrix rubber components, and combining them with specific amounts of other components, such as silica, carbon nanotubes, and graphene, the resulting high thermal conductivity and oil resistance acrylate rubber exhibits excellent high-temperature resistance, oil resistance, and mechanical properties, enabling long-term use at high temperatures and meeting the needs of fields such as oil seals. Even further, the epoxy groups in the epoxidized rubber molecular chains can react with functional groups such as carboxyl, amino, and hydroxyl groups, effectively enhancing the interaction with silica, carbon nanotubes, and graphene, further improving the oil resistance of the acrylate rubber.

[0015] According to the present invention, in a preferred embodiment, the composition comprises: based on 100 parts by weight of the acrylate rubber, 10-30 parts by weight of epoxidized rubber, 10-20 parts by weight of fluororubber, 20-35 parts by weight of silica, 5-18 parts by weight of carbon nanotubes, and 5-15 parts by weight of graphene.

[0016] According to the present invention, in a more preferred embodiment, the composition comprises: based on 100 parts by weight of the acrylate rubber, 10-30 parts by weight of epoxidized rubber, 10-20 parts by weight of fluororubber, 20-35 parts by weight of silica, 5-12 parts by weight of carbon nanotubes, and 5-8 parts by weight of graphene.

[0017] According to the present invention, the epoxidized rubber is selected from one or more of epoxidized natural rubber, epoxidized isoprene rubber, epoxidized butadiene rubber, epoxidized nitrile rubber, epoxidized styrene-butadiene rubber, epoxidized styrene-butadiene-styrene copolymer, and epoxidized styrene-isoprene-styrene copolymer; preferably, the epoxidized rubber is epoxidized natural rubber. In the present invention, the addition of the epoxidized rubber can significantly improve the interaction between the filler and the rubber matrix, making the contact between the components of the high thermal conductivity and oil-resistant acrylate rubber composition more stable, and ultimately enabling the high thermal conductivity and oil-resistant acrylate rubber to obtain excellent high temperature resistance and oil resistance.

[0018] According to the present invention, the inventors have discovered that when epoxidized rubber is used as the base rubber, the epoxidized rubber molecular chain has high polarity and good oil resistance. The epoxidized rubber molecular chain contains epoxy groups that can react with functional groups such as carboxyl, amino, and hydroxyl groups, effectively enhancing the interaction with silica, carbon nanotubes, and graphene. Furthermore, the co-vulcanization of acrylate rubber, epoxidized rubber, and fluororubber can improve the overall performance of the high thermal conductivity and oil resistance acrylate rubber.

[0019] According to the present invention, the acrylate rubber is selected from one or more of active chlorine-type acrylate rubber, epoxy-type acrylate rubber and carboxylic acid-type acrylate rubber; preferably, the acrylate rubber is active chlorine-type acrylate rubber; more preferably, the Mooney viscosity of the acrylate rubber is 28-45.

[0020] According to the present invention, the fluororubber is selected from one or more of binary copolymer elastomers, ternary copolymer elastomers, fluoroether rubbers, fluorinated polyacrylate rubbers and fluorinated phosphononitrile rubbers; preferably, the fluororubber is a binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene.

[0021] According to the present invention, the binary copolymer elastomer is a binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene and / or a binary copolymer elastomer of vinylidene fluoride and trifluorochloroethylene; wherein, in the binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene, based on the total amount of the binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene, the content of vinylidene fluoride is 67-80 mol%, and the content of hexafluoropropylene is 20-33 mol%; in the binary copolymer elastomer of vinylidene fluoride and trifluorochloroethylene, based on the total amount of the binary copolymer elastomer of vinylidene fluoride and trifluorochloroethylene, the content of vinylidene fluoride is 31-80 mol%, and the content of trifluorochloroethylene is 20-69 mol%.

[0022] According to the present invention, the ternary copolymer elastomer is an elastomer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene ternary copolymer; wherein, based on the total amount of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene ternary copolymer elastomer, the content of vinylidene fluoride is 50-68 mol%, the content of hexafluoropropylene is 16-24 mol%, and the content of tetrafluoroethylene is 16-26 mol.

[0023] According to the present invention, the carbon nanotubes are selected from one or more of hydroxyl-modified carbon nanotubes, carboxyl-modified carbon nanotubes, and amino-modified carbon nanotubes. In the present invention, preferably, the length of the carbon nanotubes is 0.5-30 μm, more preferably 2-30 μm, and more preferably 10-30 μm; the outer diameter is 8-30 nm, more preferably 10-25 nm, and more preferably 10-20 nm.

[0024] According to the present invention, the graphene is selected from one or more of hydroxyl-modified graphene, carboxyl-modified graphene, and amino-modified graphene; preferably, the graphene is amino-modified graphene; more preferably, the amino content in the amino-modified graphene is 4-7 wt%. In the present invention, the thickness of the graphene is 0.3-10 nm, preferably 0.3-5 nm, and more preferably 0.6-5 nm.

[0025] According to the present invention, the inventors have discovered that using a composite filler including carbon nanotubes, graphene, and silica in a high thermal conductivity and oil-resistant acrylate rubber composition can quickly dissipate the heat from the composition, allowing it to maintain good performance at higher temperatures and improving its high-temperature resistance.

[0026] According to the present invention, the composition further includes one or more of a vulcanizing agent, a accelerator, and an antioxidant; and based on 100 parts by weight of the acrylate rubber, the vulcanizing agent is 1-3 parts by weight, the accelerator is 1-3 parts by weight, and the antioxidant is 1-3 parts by weight; preferably, based on 100 parts by weight of the acrylate rubber, the vulcanizing agent is 1.5-2.5 parts by weight, the accelerator is 1.5-2.5 parts by weight, and the antioxidant is 1.5-2.5 parts by weight.

[0027] According to the present invention, the vulcanizing agent is selected from one or more of sulfur, dicumyl peroxide, N,N-di-cinnamyl-1,6-hexanediamine, a mixture of N,N-di-cinnamyl-1,6-hexanediamine and benzoic acid amine, a mixture of hexanediamine carbamate and benzoic acid amine, and 2,4,6-trimercaptotriazine; preferably, the vulcanizing agent is N,N-di-cinnamyl-1,6-hexanediamine and / or dicumyl peroxide.

[0028] According to the present invention, the accelerator is selected from one or more of magnesium oxide, calcium hydroxide, zinc oxide, lead oxide and lead carbonate; preferably, the accelerator is calcium hydroxide.

[0029] According to the present invention, the antioxidant is selected from at least one of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine (antioxidant 445), 2-propanone diphenylamine reaction product (antioxidant BLE), p-cresol and dicyclopentadiene butylated product (antioxidant 616); preferably, the antioxidant is 4,4'-bis(α,α-dimethylbenzyl)diphenylamine.

[0030] A second aspect of the present invention provides a method for preparing a high thermal conductivity and oil-resistant acrylate rubber using the aforementioned high thermal conductivity and oil-resistant acrylate rubber composition, wherein the method comprises:

[0031] (1) Mix the base rubber and filler and knead to obtain the compound;

[0032] (2) The compound is subjected to a first-stage vulcanization and a second-stage vulcanization treatment in sequence to obtain a high thermal conductivity and oil-resistant acrylate rubber.

[0033] According to the present invention, in a preferred embodiment, when the combination contains a vulcanizing agent, a accelerator, and an antioxidant, the method for producing the high thermal conductivity and oil-resistant acrylate rubber includes:

[0034] (1) Mix the base rubber, filler, antioxidant, vulcanizing agent and accelerator and knead to obtain the compound rubber;

[0035] (2) The compound is subjected to a first-stage vulcanization and a second-stage vulcanization treatment in sequence to obtain a high thermal conductivity and oil-resistant acrylate rubber.

[0036] According to the present invention, in step (2), the method specifically includes: performing a first-stage vulcanization on a flat vulcanizing machine and then performing a second-stage vulcanization in an oven to obtain a high thermal conductivity and oil-resistant acrylate rubber.

[0037] According to the present invention, the conditions for the first stage of vulcanization include: vulcanization temperature of 165-175℃, vulcanization pressure of 10-20MPa, and vulcanization time of t90+5 minutes.

[0038] According to the present invention, the conditions for the two-stage vulcanization include: a vulcanization temperature of 195-205°C and a vulcanization time of 4.0-4.5 h.

[0039] According to the present invention, it should be noted that t90 refers to the positive vulcanization time of the acrylate rubber composition, which is measured using a rubber vulcanizing apparatus.

[0040] According to the present invention, the base rubber and filler are mixed in a mixing equipment, wherein the mixing equipment can be a conventional mixing equipment in the art, such as at least one of a two-roll mill, a three-roll mixer and a Hacker rheometer.

[0041] In this invention, the components are mixed in the order specified in this invention to prepare the compound rubber, which enables the components in the composition to be fully dispersed. The resulting high thermal conductivity and oil-resistant acrylate rubber has excellent high temperature resistance, oil resistance and mechanical properties.

[0042] A third aspect of the present invention provides a high thermal conductivity and oil-resistant acrylate rubber prepared by the method described above.

[0043] A fourth aspect of the present invention provides the application of the aforementioned high thermal conductivity and oil-resistant acrylate rubber in one or more of oil seals, gaskets, hoses, tank liners, and cable sheaths.

[0044] The present invention will be described in detail below through embodiments.

[0045] In the following examples and comparative examples:

[0046] The t90 was tested using a rubber vulcanizing apparatus.

[0047] Thermal conductivity was measured using the method specified in GB / T 11205-2009.

[0048] Mechanical properties were measured using the method described in GB / T528-2009;

[0049] Oil resistance was determined by the following method: the oil resistance test was conducted according to GB / T1690-92, and the oil resistance performance test used ASTM 3# standard oil. The test conditions were: temperature 150℃ and time 72h.

[0050] Example 1

[0051] (1) The base rubber, filler, antioxidant, vulcanizing agent and accelerator are mixed to obtain a compound rubber;

[0052] (2) The compound rubber is vulcanized in a vulcanizing machine for the first stage. The conditions for the first stage vulcanization are: temperature 170℃, pressure 15MPa, vulcanization time t90+5 minutes (Note: t90 is determined by the formula); the second stage vulcanization is carried out in an oven. The vulcanization conditions are: temperature 180℃, time 4h.

[0053] The obtained high thermal conductivity and oil-resistant acrylate rubber is designated as S1, and the components and their contents are shown in Table 1.

[0054] The properties of high thermal conductivity and oil-resistant acrylate rubber S1 were tested, and the test results are shown in Table 2.

[0055] Examples 2-9

[0056] High thermal conductivity and oil-resistant acrylate rubbers S2-S9 were prepared using the same method as in Example 1, except that the components and their contents were different. Specifically, the components and their contents are shown in Table 1.

[0057] The properties of high thermal conductivity and oil-resistant acrylate rubbers S2-S9 were tested, and the test results are shown in Table 2.

[0058] Comparative Examples 1-7

[0059] High thermal conductivity and oil-resistant acrylate rubbers DS1-DS7 were prepared using the same method as in Example 1, except that the components and their contents were different. Specifically, the components and their contents are shown in Table 1.

[0060] The properties of high thermal conductivity and oil-resistant acrylate rubbers DS1-DS7 were tested, and the test results are shown in Table 2.

[0061] Table 1

[0062]

[0063] Note: All component contents are parts by weight.

[0064] In Table 1:

[0065] Acrylic rubber A1 is an active chlorine-based acrylic rubber purchased from Daewoo Corporation, with the grade AC and Mooney viscosity of 40.

[0066] Acrylic rubber A2 is an active chlorine-based acrylic rubber from Zeon Corporation of Japan, with the grade AR74 and Mooney viscosity of 33.

[0067] Epoxidized natural rubber B1 is a product of the Institute of Agricultural Product Processing Design, Chinese Academy of Tropical Agricultural Sciences, with an epoxy content of 50%.

[0068] The fluororubber is type 2603 produced by Sichuan Chenguang Research Institute.

[0069] The elastomer is a copolymer of vinylidene fluoride and hexafluoropropylene, with the total amount of vinylidene fluoride and hexafluoropropylene binary copolymer elastomer as the basis, the content of vinylidene fluoride is 78 mol% and the content of hexafluoropropylene is 22 mol%.

[0070] Carbon nanotube I is a hydroxyl-modified carbon nanotube with a length of 10-30 μm, an outer diameter of 10-20 nm, and a hydroxyl content of 2.7 wt%. It was purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0071] Carbon nanotubes II are unmodified carbon nanotubes with a length of 10-30 μm and an outer diameter of 10-20 nm, purchased from Aladdin.

[0072] Carbon nanotubes III are hydroxyl-modified carbon nanotubes with a length of 10-30 μm and an outer diameter of 10-20 nm. The hydroxyl content is 4 wt%, and they were purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0073] Graphene I is an amino-modified graphene with a thickness of 0.6-5 nm and an amino content of 4 wt%, purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0074] Graphene II is unmodified graphene with a thickness of 0.55-3.74 nm, purchased from Aladdin;

[0075] Graphene III is an amino-modified graphene with a thickness of 0.6-5 nm and an amino content of 7 wt%. It was purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0076] The vulcanizing agents are N,N-di-cinnamyl-1,6-hexanediamine from Shanghai Lanke Pharmaceutical Technology Development Co., Ltd., and dicumyl peroxide from Aladdin.

[0077] The accelerator is calcium hydroxide from Fengcheng Reagent Factory in Fengxian District, Shanghai.

[0078] The antioxidant is 4,4'-bis(α.α-dimethylbenzyl)diphenylamine from Shanghai Linyi Chemical Co., Ltd.

[0079] Table 2

[0080]

[0081] As can be seen from the results in Table 2, compared with Comparative Examples 1-7, the high thermal conductivity and oil resistance acrylate rubber prepared by the high thermal conductivity and oil resistance acrylate rubber composition provided in Examples 1-9 of the present invention did not show a significant decrease in performance after being immersed in an oil bath under high temperature conditions, indicating that it has excellent oil resistance. At the same time, the high thermal conductivity and oil resistance acrylate rubber has excellent thermal conductivity and mechanical properties; and it still has good mechanical properties after the oil resistance test.

[0082] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A high thermal conductivity and oil-resistant acrylate rubber composition, said composition comprising a matrix rubber and fillers, characterized in that, The matrix rubber includes acrylate rubber, epoxidized rubber, and fluororubber, and the filler includes silica, carbon nanotubes, and graphene; and based on 100 parts by weight of the acrylate rubber, the epoxidized rubber is 10-30 parts by weight, the fluororubber is 10-20 parts by weight, the silica is 20-40 parts by weight, the carbon nanotubes are 5-20 parts by weight, and the graphene is 5-18 parts by weight.

2. The composition according to claim 1, wherein, The composition comprises, based on 100 parts by weight of the acrylate rubber, 20-35 parts by weight of silica, 5-18 parts by weight of carbon nanotubes, and 5-15 parts by weight of graphene.

3. The composition according to claim 1, wherein, The epoxidized rubber is selected from one or more of epoxidized natural rubber, epoxidized isoprene rubber, epoxidized butadiene rubber, epoxidized nitrile rubber, epoxidized styrene-butadiene rubber, epoxidized styrene-butadiene-styrene copolymer, and epoxidized styrene-isoprene-styrene copolymer. And / or, the acrylate rubber is selected from one or more of the following: active chlorine acrylate rubber, epoxy acrylate rubber, diene acrylate rubber, and carboxylic acid acrylate rubber; And / or, the fluororubber is selected from one or more of binary copolymer elastomers, ternary copolymer elastomers, fluoroether rubbers, fluorinated polyacrylate rubbers, and fluorinated phosphononitrile rubbers.

4. The composition according to claim 3, wherein, The epoxidized rubber is epoxidized natural rubber; And / or, the acrylate rubber is an active chlorinated acrylate rubber; And / or, the binary copolymer elastomer is a binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene and / or a binary copolymer elastomer of vinylidene fluoride and trifluorochloroethylene; And / or, the ternary copolymer elastomer is an elastomer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene ternary copolymer.

5. The composition according to claim 4, wherein, The Mooney viscosity of the acrylate rubber is 28-45; And / or, the fluororubber is a binary copolymer elastomer of vinylidene fluoride and hexafluoropropylene.

6. The composition according to claim 2, wherein, The carbon nanotubes are selected from one or more of hydroxyl-modified carbon nanotubes, carboxyl-modified carbon nanotubes, and amino-modified carbon nanotubes. And / or, the graphene is selected from one or more of hydroxyl-modified graphene, carboxyl-modified graphene, and amino-modified graphene.

7. The composition according to claim 6, wherein, The graphene is amino-modified graphene.

8. The composition according to claim 7, wherein, The amino content in the amino-modified graphene is 4-7 wt%.

9. The composition according to any one of claims 1-8, wherein, The composition also includes one or more of a vulcanizing agent, an accelerator, and an antioxidant.

10. The composition according to claim 9, wherein, Based on 100 parts by weight of the acrylate rubber, the vulcanizing agent is 1-3 parts by weight, the accelerator is 1-3 parts by weight, and the antioxidant is 1-3 parts by weight.

11. The composition according to claim 10, wherein, Based on 100 parts by weight of the acrylate rubber, the vulcanizing agent is 1.5-2.5 parts by weight, the accelerator is 1.5-2.5 parts by weight, and the antioxidant is 1.5-2.5 parts by weight.

12. The composition according to claim 11, wherein, The vulcanizing agent is selected from one or more of sulfur, dicumyl peroxide, N,N-di-cinnamyl-1,6-hexanediamine, a mixture of N,N-di-cinnamyl-1,6-hexanediamine and benzoic acid amine, a mixture of hexanediamine carbamate and benzoic acid amine, and 2,4,6-trimercaptotriazine. And / or, the accelerator is selected from one or more of magnesium oxide, calcium hydroxide, zinc oxide, lead oxide, and lead carbonate; And / or, the antioxidant is selected from one or more of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine, the reaction product of 2-propanone diphenylamine, and the butylated product of p-cresol and dicyclopentadiene.

13. The composition according to claim 12, wherein, The vulcanizing agent is N,N-di-cinnamyl-1,6-hexanediamine and / or dicumyl peroxide; And / or, the accelerator is calcium hydroxide; And / or, the antioxidant is 4,4'-bis(α,α-dimethylbenzyl)diphenylamine.

14. A method for preparing a high thermal conductivity and oil-resistant acrylate rubber using the high thermal conductivity and oil-resistant acrylate rubber composition according to any one of claims 1-13, characterized in that, The method includes: (1) Mix the base rubber and filler together to obtain a compound; (2) The compound is subjected to a first-stage vulcanization and a second-stage vulcanization treatment in sequence to obtain a high thermal conductivity and oil-resistant acrylate rubber.

15. The method according to claim 14, wherein, The conditions for the first stage of vulcanization include: vulcanization temperature of 165-175℃, vulcanization pressure of 10-20MPa, and vulcanization time of t90+5 minutes, where t90 refers to the positive vulcanization time of the acrylate rubber composition. And / or, the conditions for the two-stage vulcanization include: a vulcanization temperature of 195-205℃ and a vulcanization time of 4.5-5.5h.

16. A high thermal conductivity and oil-resistant acrylate rubber prepared by the method of claim 14 or 15.

17. The use of the high thermal conductivity and oil-resistant acrylate rubber of claim 16 in oil seals, gaskets, hoses, tank liners and cable sheaths.

Citation Information

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