Hydrogenated nitrile rubber composition as well as preparation method and application thereof

Abstract

The invention discloses a hydrogenated butadiene-acrylonitrile rubber composition and a preparation method and application thereof, the hydrogenated butadiene-acrylonitrile rubber composition comprises the following raw materials by weight: 100 parts of HNBR, 10-15 parts of white carbon black, 100-120 parts of zirconia, 5-10 parts of a plasticizer, 0.5-2 parts of an antioxidant, 0.5-2 parts of a silane coupling agent, 0.5-2 parts of a light stabilizer, 1-2 parts of an assistant crosslinker and 2-3 parts of a vulcanizing agent, and the invention relates to the technical field of high polymer materials. According to the hydrogenated butadiene-acrylonitrile rubber composition as well as the preparation method and the application thereof, the specific gravity of the hydrogenated butadiene-acrylonitrile rubber composition is increased by adding the zirconium oxide, so that the specific gravity reaches 1.65-1.8, and meanwhile, the mechanical property and the wear resistance of the hydrogenated butadiene-acrylonitrile rubber composition are improved by adding the zirconium oxide and the white carbon black which have a synergistic effect; the hydrogenated butadiene-acrylonitrile rubber composition has the advantages of excellent mechanical strength, aging resistance, long service life and easiness in processing.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a hydrogenated nitrile butadiene rubber composition, its preparation method, and its application. Background Technology

[0002] Hydrogenated nitrile butadiene rubber (HNBR) is a highly saturated elastomer produced by selectively hydrogenating nitrile butadiene rubber (NBR). It possesses excellent oil resistance, heat resistance, chemical corrosion resistance, and mechanical properties. However, traditional HNBR still suffers from insufficient wear resistance, limited aging resistance, and poor processability under high temperature, high pressure, or complex chemical environments. Furthermore, while some existing patents optimize performance by adding reinforcing agents, vulcanization systems, or nanomaterials, these methods struggle to simultaneously meet the demands for high specific gravity, high strength, and high hardness. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a hydrogenated nitrile butadiene rubber composition, its preparation method, and its application. By optimizing the raw material ratio and process conditions, it overcomes the deficiencies of traditional HNBR in terms of specific gravity and mechanical properties, and expands its application in the field of smart wearable devices.

[0004] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution: a hydrogenated nitrile butadiene rubber composition, wherein the raw materials include, by weight, 100 parts of HNBR, 10-15 parts of silica, 100-120 parts of zirconium oxide, 5-10 parts of plasticizer, 0.5-2 parts of antioxidant, 0.5-2 parts of silane coupling agent, 0.5-2 parts of light stabilizer, 1-2 parts of co-crosslinking agent, and 2-3 parts of vulcanizing agent.

[0005] Preferably, the raw materials include, by weight: 100 parts HNBR, 13 parts silica, 110 parts zirconium oxide, 7 parts plasticizer, 1.25 parts antioxidant, 1.25 parts silane coupling agent, 1.25 parts light stabilizer, 1.5 parts co-crosslinking agent, and 2.5 parts vulcanizing agent.

[0006] Preferably, the raw materials include, by weight: 100 parts HNBR, 10 parts silica, 100 parts zirconium oxide, 5 parts plasticizer, 0.5 parts antioxidant, 0.5 parts silane coupling agent, 0.5 parts light stabilizer, 1 part crosslinking agent, and 2 parts vulcanizing agent.

[0007] Preferably, the raw materials include, by weight: 100 parts HNBR, 15 parts silica, 120 parts zirconium oxide, 10 parts plasticizer, 2 parts antioxidant, 2 parts silane coupling agent, 2 parts light stabilizer, 2 parts crosslinking agent and 3 parts vulcanizing agent.

[0008] Preferably, the plasticizer is one of dibutyl phthalate, dioctyl adipate, or tricresyl phosphate.

[0009] Preferably, the silane coupling agent is one of silane coupling agent A-171 or silane coupling agent A-172, and the co-crosslinking agent is one of trimethylolpropane triacrylate, triallyl cyanurate or zinc diacrylate.

[0010] Preferably, the light stabilizer is one of UV-531 or UV-327, and the vulcanizing agent is one of dimorpholine disulfide, benzoyl peroxide, or ethyl carbamate.

[0011] This invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, specifically comprising the following steps: S1. Mixing stage: Mix HNBR, plasticizer, antioxidant and silane coupling agent in an internal mixer, control the temperature at 80-120℃, and mix for 10-20 minutes. S2. Calendering treatment: Add silica and zirconium oxide, and use a multi-calendering process to make them uniformly oriented in the rubber matrix; S3, Vulcanization stage: Vulcanize the mixture at 150-180℃ for 5-15 minutes. The light stabilizer, crosslinking agent and vulcanizing agent work together to form a high crosslinking density network.

[0012] The present invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, and its application in smart wearable devices.

[0013] (III) Beneficial Effects This invention provides a hydrogenated nitrile butadiene rubber composition, its preparation method, and its application. Compared with the prior art, it has the following advantages: (1) Zirconia has a high melting point and thermal stability and is not easily decomposed under high temperature conditions. The hydrogenated nitrile rubber composition provided by the present invention can form a thermal barrier layer in the rubber composition by adding zirconium oxide, thereby slowing down the thermal oxidative aging of the rubber composition and improving the aging resistance, heat resistance and thermal stability of the rubber composition.

[0014] (2) Zirconia has high hardness. The hydrogenated nitrile rubber composition provided by the present invention has the addition of zirconia. Zirconia can form stress concentration points in the rubber composition. When the rubber composition is under stress, zirconia can induce the orientation and shear yielding of rubber molecular chains and absorb energy, thereby improving the strength and toughness of the rubber composition. In addition, during the friction process of the rubber composition, zirconia has high hardness and can reduce the direct wear of the rubber matrix, thereby extending the service life of the rubber composition.

[0015] (3) Zirconia is a metal oxide and has chemical inertness. The hydrogenated nitrile rubber composition provided by the present invention can improve the rubber composition's resistance to corrosion by oil, chemical solvents, etc. by adding zirconium oxide, thereby extending the service life of the rubber composition.

[0016] (4) The hydrogenated nitrile rubber composition provided by the present invention increases the specific gravity of the rubber composition by adding zirconium oxide. The rubber composition has a high specific gravity of 1.65-1.8, which can replace fluororubber in the application of smart wearable devices.

[0017] (5) The hydrogenated nitrile rubber composition provided by the present invention, by adding zirconium oxide and silica, can play a synergistic role as fillers, thereby improving the mechanical properties, aging resistance and corrosion resistance of the rubber composition. Attached Figure Description

[0018] Figure 1 This is a flowchart of the preparation method of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 The present invention provides four technical solutions: a hydrogenated nitrile rubber composition and its preparation method and application.

[0021] Example 1: A hydrogenated nitrile butadiene rubber composition, the raw materials of which include, by weight: 100 parts HNBR, 13 parts silica, 110 parts zirconium oxide, 7 parts plasticizer, 1.25 parts antioxidant, 1.25 parts silane coupling agent, 1.25 parts light stabilizer, 1.5 parts co-crosslinking agent, and 2.5 parts vulcanizing agent. The plasticizer is dibutyl phthalate, the silane coupling agent is silane coupling agent A-171, the co-crosslinking agent is trimethylolpropane triacrylate, the light stabilizer is UV-531, and the vulcanizing agent is dimorpholine disulfide.

[0022] This invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, specifically comprising the following steps: S1. Mixing stage: Mix HNBR, plasticizer, antioxidant and silane coupling agent in an internal mixer, control the temperature at 100℃ and mix for 15 minutes. S2. Calendering treatment: Add silica and zirconium oxide, and use a multi-calendering process to make them uniformly oriented in the rubber matrix; S3, Vulcanization stage: The mixture is vulcanized at 175°C for 6 minutes. The light stabilizer, crosslinking agent and vulcanizing agent work together to form a high crosslinking density network.

[0023] The present invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, which is used in oilfield equipment, the automotive industry and smart wearable devices.

[0024] Example 2: A hydrogenated nitrile butadiene rubber composition, the raw materials of which include, by weight: 100 parts HNBR, 10 parts silica, 100 parts zirconium oxide, 5 parts plasticizer, 0.5 parts antioxidant, 0.5 parts silane coupling agent, 0.5 parts light stabilizer, 1 part co-crosslinking agent, and 2 parts vulcanizing agent. The plasticizer is dioctyl adipate, the silane coupling agent is silane coupling agent A-172, the co-crosslinking agent is triallyl cyanurate, the light stabilizer is UV-327, and the vulcanizing agent is benzoyl peroxide.

[0025] This invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, specifically comprising the following steps: S1. Mixing stage: Mix HNBR, plasticizer, antioxidant and silane coupling agent in an internal mixer, control the temperature at 80℃ and mix for 10 minutes. S2. Calendering treatment: Add silica and zirconium oxide, and use a multi-calendering process to make them uniformly oriented in the rubber matrix; S3, Vulcanization stage: The mixture is vulcanized at 150°C for 5 minutes. The light stabilizer, crosslinking agent and vulcanizing agent work together to form a high crosslinking density network.

[0026] The present invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, which is used in oilfield equipment, the automotive industry and smart wearable devices.

[0027] Example 3: A hydrogenated nitrile butadiene rubber composition, the raw materials of which include, by weight: 100 parts HNBR, 15 parts silica, 120 parts zirconium oxide, 10 parts plasticizer, 2 parts antioxidant, 2 parts silane coupling agent, 2 parts light stabilizer, 2 parts co-crosslinking agent, and 3 parts vulcanizing agent. The plasticizer is tricresyl phosphate, the silane coupling agent is silane coupling agent A-171, the co-crosslinking agent is zinc diacrylate, the light stabilizer is UV-531, and the vulcanizing agent is ethyl carbamate.

[0028] This invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, specifically comprising the following steps: S1. Mixing stage: Mix HNBR, plasticizer, antioxidant and silane coupling agent in an internal mixer, control the temperature at 120℃ and mix for 20 minutes. S2. Calendering treatment: Add silica and zirconium oxide, and use a multi-calendering process to make them uniformly oriented in the rubber matrix; S3, Vulcanization stage: The mixture is vulcanized at 180°C for 15 minutes. The light stabilizer, crosslinking agent and vulcanizing agent work together to form a high crosslinking density network.

[0029] The present invention also provides a method for preparing a hydrogenated nitrile butadiene rubber composition, and its application in smart wearable devices.

[0030] Table 1. Example Data Table In summary, this invention, by adding zirconium oxide and silica, allows both to work synergistically as fillers, thereby improving the mechanical properties, aging resistance, and corrosion resistance of the rubber composition. Furthermore, the addition of zirconium oxide increases the specific gravity of the rubber composition, resulting in a high specific gravity of 1.65-1.8, which can replace fluororubber in the application of smart wearable devices.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrogenated nitrile butadiene rubber composition, characterized in that: The raw materials, by weight, include: 100 parts HNBR, 10-15 parts silica, 100-120 parts zirconium oxide, 5-10 parts plasticizer, 0.5-2 parts antioxidant, 0.5-2 parts silane coupling agent, 0.5-2 parts light stabilizer, 1-2 parts crosslinking agent, and 2-3 parts vulcanizing agent.

2. The hydrogenated nitrile butadiene rubber composition according to claim 1, characterized in that: The raw materials, by weight, include: 100 parts HNBR, 13 parts silica, 110 parts zirconium oxide, 7 parts plasticizer, 1.25 parts antioxidant, 1.25 parts silane coupling agent, 1.25 parts light stabilizer, 1.5 parts co-crosslinking agent, and 2.5 parts vulcanizing agent.

3. The hydrogenated nitrile butadiene rubber composition according to claim 1, characterized in that: The raw materials, by weight, include: 100 parts HNBR, 10 parts silica, 100 parts zirconium oxide, 5 parts plasticizer, 0.5 parts antioxidant, 0.5 parts silane coupling agent, 0.5 parts light stabilizer, 1 part crosslinking agent, and 2 parts vulcanizing agent.

4. The hydrogenated nitrile butadiene rubber composition according to claim 1, characterized in that: The raw materials, by weight, include: 100 parts HNBR, 15 parts silica, 120 parts zirconium oxide, 10 parts plasticizer, 2 parts antioxidant, 2 parts silane coupling agent, 2 parts light stabilizer, 2 parts crosslinking agent, and 3 parts vulcanizing agent.

5. A hydrogenated nitrile butadiene rubber composition according to any one of claims 1-4, characterized in that: The plasticizer is one of dibutyl phthalate, dioctyl adipate, or tricresyl phosphate.

6. A hydrogenated nitrile butadiene rubber composition according to any one of claims 1-4, characterized in that: The silane coupling agent is one of silane coupling agent A-171 or silane coupling agent A-172, and the co-crosslinking agent is one of trimethylolpropane triacrylate, triallyl cyanurate, or zinc diacrylate.

7. A hydrogenated nitrile butadiene rubber composition according to any one of claims 1-4, characterized in that: The light stabilizer is one of UV-531 or UV-327, and the vulcanizing agent is one of dimorpholine disulfide, benzoyl peroxide, or ethyl carbamate.

8. A method for preparing the hydrogenated nitrile butadiene rubber composition according to any one of claims 1-4, characterized in that: Specifically, the following steps are included: S1. Mixing stage: Mix HNBR, plasticizer, antioxidant and silane coupling agent in an internal mixer, control the temperature at 80-120℃, and mix for 10-20 minutes. S2. Calendering treatment: Add silica and zirconium oxide, and use a multi-calendering process to make them uniformly oriented in the rubber matrix; S3, Vulcanization stage: Vulcanize the mixture at 150-180℃ for 5-15 minutes. The light stabilizer, crosslinking agent and vulcanizing agent work together to form a high crosslinking density network.

9. A hydrogenated nitrile butadiene rubber composition prepared by the method of claim 8, characterized in that: Applications in smart wearable devices.

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