A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock and its preparation method

Abstract

The present application relates to a kind of hydrogenated nitrile rubber resistant to ultraviolet and high-voltage electric shock and its preparation method, belong to the technical field of polymer material synthesis.The present application is compounded by hydrogenated nitrile rubber and olefin copolymer, introduces benzene ring and furan ring structure in the structure of olefin copolymer, and gives the excellent ultraviolet aging resistance and anti-electric shock performance of rubber;Add modified filler to increase the mechanical strength, insulating property and high-voltage performance of rubber;And add benzotriazole light stabilizer, phenolic antioxidant and phosphite antioxidant to further improve the anti-ultraviolet and antioxidant performance of material, prolong the service life of material.

Description

Technical Field

[0001] This invention belongs to the field of polymer material synthesis technology, and relates to a hydrogenated nitrile butadiene rubber that is resistant to ultraviolet radiation and high voltage electric shock and its preparation method. Background Technology

[0002] Hydrogenated nitrile butadiene rubber (NBR) is a high-performance elastomer prepared by selectively hydrogenating the double bonds in NBR. It is widely used in industry, automotive, and aerospace fields due to its excellent heat resistance, oil resistance, and aging resistance. Especially in high-voltage electric shock environments, higher requirements are placed on the material's aging resistance, UV resistance, and dielectric properties. Existing high-voltage electric shock resistant materials typically include polyethylene, polyvinyl chloride, and EPDM rubber. While these materials possess some resistance to electric shock, their performance in high-temperature resistance, aging resistance, and mechanical properties is limited. Furthermore, traditional rubber materials such as natural rubber and butadiene rubber, due to their poor heat and chemical resistance, are no longer sufficient to meet the growing demands of industrial and power systems.

[0003] Hydrogenated nitrile butadiene rubber (HNBR) was chosen as the main matrix material based on its unique molecular structure and superior properties. While maintaining the oil resistance and abrasion resistance advantages of nitrile butadiene rubber, the hydrogenation of double bonds significantly improves the material's thermal stability and oxidation resistance, enabling long-term use in harsh environments such as high temperature and high pressure. Compared to EPDM rubber, HNBR exhibits better mechanical properties and chemical resistance; compared to polyethylene, it offers superior elasticity and processability. Furthermore, the polar groups in the molecular structure of HNBR enhance its compatibility with modified fillers and functional additives, further improving the material's overall performance. By compounding HNBR with modified fillers, olefin copolymers, and additives, not only can the material's UV resistance and high-voltage shock resistance be significantly improved, but its mechanical strength and electrical insulation properties can also be effectively balanced.

[0004] Although various modified materials have been developed for different application scenarios in existing technologies, some shortcomings still exist. First, traditional rubber-based anti-electric shock materials have poor long-term stability under high-voltage environments, and are prone to dielectric breakdown or aging problems, limiting their service life in complex environments. Second, the uneven dispersion of additives and fillers in the matrix affects the overall performance of the material. Third, some existing high-performance materials are often costly and have complex processes, which are not conducive to large-scale industrial production. Therefore, how to develop a novel hydrogenated nitrile butadiene rubber material that combines UV resistance, high-voltage electric shock resistance, high cost-effectiveness, and good processability through molecular design, optimized formulation of additives, and process improvement is an urgent problem to be solved. Summary of the Invention

[0005] This invention relates to a hydrogenated nitrile butadiene rubber (NBR) resistant to ultraviolet radiation and high-voltage electric shock, and its preparation method, belonging to the field of polymer material synthesis technology. This invention involves compounding hydrogenated NBR with an olefin copolymer, introducing benzene and furan ring structures into the olefin copolymer structure to endow the rubber with excellent resistance to ultraviolet aging and electric shock. Modified fillers are added to increase the rubber's mechanical strength, insulation, and high-voltage resistance. Furthermore, benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants are added to further improve the material's UV resistance and antioxidant properties, extending its service life.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock comprises the following components in parts by weight: 80-120 parts hydrogenated nitrile butadiene rubber, 5-20 parts olefin copolymer, 20-50 parts modified filler, 2-6 parts crosslinking agent and 0.8-5 parts functional additives.

[0008] As a preferred embodiment of the present invention, the olefin copolymer components include 1,3-butadiene, styrene, and furanyl olefin, wherein the mass ratio of 1,3-butadiene, styrene, and furanyl olefin is 5-15:20-30:2-8; the preparation method of the olefin copolymer is as follows: under nitrogen protection, monomers 1,3-butadiene, styrene, and furanyl olefin are dissolved in toluene, n-butyllithium is added as an initiator, tetrahydrofuran is added as a co-catalyst, and the mixture is stirred at 30-80°C for 2-6 hours. Then, methanol is added to terminate the polymerization reaction, and the olefin copolymer is obtained after precipitation, washing, and drying.

[0009] As a preferred embodiment of the present invention, the furanyl olefin is at least one selected from 2-vinylfuran, 2-furanacrylic acid, 2-furan acrolein, 3-(2-furan)acrolein, and 4-(2-furanyl)-3-buten-2-one.

[0010] As a preferred embodiment of the present invention, the mass ratio of the monomer, toluene, n-butyllithium and tetrahydrofuran is 1:6-20:0.001-0.01:0.01-0.05.

[0011] As a preferred embodiment of the present invention, the modified filler comprises modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth. The preparation method of the modified filler is as follows: prepare a 3-5 wt% silane coupling agent anhydrous ethanol solution, stir for 20-40 min, add polyester fiber, quartz sand, limestone, and diatomaceous earth, ultrasonically disperse for 20-40 min, soak for 1-2 h, and obtain modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth after filtration and drying.

[0012] As a preferred embodiment of the present invention, the quartz sand has a particle size of 0.5-10 μm, the limestone has a particle size of 1-20 μm, and the diatomaceous earth has a particle size of 1-15 μm; the mass ratio of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1-2:2-4:1-3:1-2, and the mass ratio of the silane coupling agent to the total mass of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1-3:100.

[0013] In a preferred embodiment of the present invention, the crosslinking agent is a peroxide crosslinking agent, a vulcanizing agent, and an auxiliary crosslinking agent; the peroxide crosslinking agent is one of di-tert-butyl peroxide and benzoyl peroxide; the vulcanizing agent is at least one of sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, hexamethylenetetramine, and N-tert-butyl-2-benzothiazole sulfenamide; and the auxiliary crosslinking agent is at least one of zinc oxide, stearic acid, tetraisopropylthiuram disulfide, tetraethylthiuram disulfide, and dibenzothiazole disulfide; the mass ratio of the peroxide crosslinking agent, the vulcanizing agent, and the auxiliary crosslinking agent is 1-3:0.5-3:0.5-2.

[0014] As a preferred embodiment of the present invention, the functional additives include benzotriazole light stabilizers, phenolic antioxidants and phosphite antioxidants, wherein the mass ratio of the benzotriazole light stabilizers, phenolic antioxidants and phosphite antioxidants is 0.5-3:0.1-0.5:0.2-1.

[0015] The method for preparing a hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock is characterized by comprising the following steps:

[0016] (1) Add olefin copolymer to hydrogenated nitrile rubber, stir evenly, add modified filler and crosslinking agent and mix at 120-170℃ for 10-20 min;

[0017] (2) Add functional additives and melt mix at 120-180℃ for 10-20 minutes;

[0018] (3) Extrude the mixture into granules.

[0019] The beneficial effects of this invention are:

[0020] (1) This invention introduces benzene ring and furan ring structures into the olefin copolymer structure by combining hydrogenated nitrile rubber and olefin copolymer. Benzene ring and furan ring are rigid conjugated ring structures with high chemical stability and intramolecular energy shielding effect, which improves the overall dielectric constant of the material and reduces dielectric loss under electric field. It can effectively slow down the concentration of local electric field inside the material under high voltage, thereby delaying the occurrence of electrical breakdown. In addition, the rigid regions of benzene ring and furan ring can form a physical barrier under high voltage electric shock, which can prevent the expansion of electrical trees caused by partial discharge, reduce the formation of breakdown path, and improve the breakdown voltage of the material.

[0021] (2) This invention increases the mechanical strength, insulation, and high-voltage resistance of rubber by adding modified fillers. Among them, the modified polyester fiber has high tensile strength and rigidity, forming a network or reinforced skeleton structure in the matrix, which can effectively absorb the energy caused by external impact or electric shock, reduce local stress concentration, and thus improve the material's resistance to electric shock and crack resistance; the low dielectric constant of quartz sand can reduce the dielectric loss of the material, suppress the expansion of electrical trees in the high-voltage electric field, and significantly improve the breakdown voltage of the composite material. In addition, quartz sand has high reflectivity and transmittance to ultraviolet rays, which can effectively shield some of the ultraviolet light energy and reduce its destructive effect on the matrix; limestone is a high resistivity material, which can effectively improve the insulation performance of the composite material, reduce the conductivity and breakdown risk in the high electric field environment, and the scattering effect of ultraviolet light can reduce the amount of ultraviolet light absorbed by the matrix material and slow down the photo-oxidative degradation process; the low dielectric constant and high resistivity of diatomaceous earth give it good insulation in the high-voltage environment, which can effectively suppress the conductivity behavior and dielectric breakdown under the high-voltage electric field.

[0022] (3) Benzo[a] light stabilizers (such as benzotriazole or benzo[a]one) contain conjugated aromatic ring structures, which can effectively absorb ultraviolet energy in the wavelength range of 200-400nm, avoiding the direct absorption of ultraviolet photon energy by the molecular bonds of the matrix material, thereby preventing chemical bond breakage and molecular chain degradation; phenolic antioxidants are a powerful free radical scavenger, which mainly inhibits the oxidative degradation of materials by capturing free radicals and terminating free radical chain reactions; phosphite antioxidants are a multifunctional antioxidant, which mainly enhances antioxidant performance by decomposing peroxides and protecting other antioxidants (such as phenols) in the material; the three additives construct a multi-level protection system from ultraviolet light shielding, free radical capture to peroxide decomposition, which effectively improves the ultraviolet resistance and antioxidant performance of the material and delays the degradation process. Detailed Implementation

[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0024] In the following examples and comparative examples, the hydrogenated nitrile rubber was purchased from Shanghai Jiadeer Chemical Technology Co., Ltd.; the polyester fiber was purchased from Taicheng Fiber Co., Ltd.; the quartz sand was purchased from Hengyang Mineral Products Processing Plant, item number 012; the limestone was purchased from Huaian Dingsheng Calcium Industry Co., Ltd.; the diatomite was purchased from Shuntian Mineral Products Processing Plant, item number S95621; the benzotriazole light stabilizer was purchased from Huichen Chemical Co., Ltd., item number UV-326; the phenolic antioxidant was purchased from Jiangsu Ruicheng Biotechnology Co., Ltd., item number 25013; and the phosphite antioxidant was purchased from Benok Biotechnology Co., Ltd.; the silane coupling agent was purchased from Shandong Bosheng Chemical Co., Ltd.; and the item number of the single product was KH570.

[0025] Example 1

[0026] A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock comprises the following components in parts by weight: 100 parts hydrogenated nitrile butadiene rubber, 15 parts olefin copolymer, 35 parts modified filler, 4 parts crosslinking agent and 3 parts functional additives.

[0027] The olefin copolymer comprises 1,3-butadiene, styrene, and furanyl olefin, wherein the mass ratio of 1,3-butadiene, styrene, and furanyl olefin is 10:25:5; the preparation method of the olefin copolymer is as follows: under nitrogen protection, monomers 1,3-butadiene, styrene, and furanyl olefin are dissolved in toluene, n-butyllithium is added as an initiator, tetrahydrofuran is added as a cocatalyst, and the mixture is stirred at 55°C for 4 hours. Then, methanol is added to terminate the polymerization reaction. After precipitation, washing, and drying, the olefin copolymer is obtained.

[0028] The furanyl olefin is 2-vinylfuran.

[0029] The mass ratio of the monomer, toluene, n-butyllithium, and tetrahydrofuran is 1:13:0.005:0.03.

[0030] The modified filler includes modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth. The modified filler is prepared by: preparing a 4wt% silane coupling agent anhydrous ethanol solution, stirring for 30 min, adding polyester fiber, quartz sand, limestone, and diatomaceous earth, ultrasonically dispersing for 30 min, soaking for 1.5 h, and then filtering and drying to obtain modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth.

[0031] The quartz sand has a particle size of 5 μm, the limestone has a particle size of 10 μm, and the diatomaceous earth has a particle size of 10 μm; the mass ratio of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1.5:3:2:1.5, and the mass ratio of the silane coupling agent to the total mass of polyester fiber, quartz sand, limestone, and diatomaceous earth is 2:100.

[0032] The crosslinking agent is a peroxide crosslinking agent, a vulcanizing agent, and an auxiliary crosslinking agent; the peroxide crosslinking agent is di-tert-butyl peroxide, the vulcanizing agent is sulfur, and the auxiliary crosslinking agent is zinc oxide; the mass ratio of the peroxide crosslinking agent, the vulcanizing agent, and the auxiliary crosslinking agent is 2:2:1.

[0033] The functional additives include benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants, wherein the mass ratio of the benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants is 2:0.3:0.6.

[0034] The preparation method of the aforementioned ultraviolet-resistant and high-voltage-shock-resistant hydrogenated nitrile butadiene rubber includes the following steps:

[0035] (1) Add olefin copolymer to hydrogenated nitrile rubber, stir evenly, add modified filler and crosslinking agent and mix at 150℃ for 15 min;

[0036] (2) Add functional additives and melt-mix at 150℃ for 15 min;

[0037] (3) Extrude the mixture into granules.

[0038] Example 2

[0039] A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock comprises the following components in parts by weight: 80 parts hydrogenated nitrile butadiene rubber, 5 parts olefin copolymer, 20 parts modified filler, 2 parts crosslinking agent and 0.8 parts functional additives.

[0040] The olefin copolymer comprises 1,3-butadiene, styrene, and furanyl olefin, wherein the mass ratio of 1,3-butadiene, styrene, and furanyl olefin is 5:20:2; the preparation method of the olefin copolymer is as follows: under nitrogen protection, monomers 1,3-butadiene, styrene, and furanyl olefin are dissolved in toluene, n-butyllithium is added as an initiator, tetrahydrofuran is added as a cocatalyst, and the mixture is stirred at 30°C for 6 hours. Then, methanol is added to terminate the polymerization reaction. After precipitation, washing, and drying, the olefin copolymer is obtained.

[0041] The furanyl olefin is 2-furanacrylic acid.

[0042] The mass ratio of the monomer, toluene, n-butyllithium, and tetrahydrofuran is 1:6:0.001:0.01.

[0043] The modified filler includes modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth. The preparation method of the modified filler is as follows: prepare a 3wt% silane coupling agent anhydrous ethanol solution, stir for 20 min, add polyester fiber, quartz sand, limestone, and diatomaceous earth, ultrasonically disperse for 20 min, soak for 1 h, and obtain modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth after filtration and drying.

[0044] The quartz sand has a particle size of 5 μm, the limestone has a particle size of 10 μm, and the diatomaceous earth has a particle size of 10 μm; the mass ratio of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1:2:1:1, and the mass ratio of the silane coupling agent to the total mass of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1:100.

[0045] The crosslinking agent is a peroxide crosslinking agent, a vulcanizing agent, and an auxiliary crosslinking agent; the peroxide crosslinking agent is di-tert-butyl peroxide, the vulcanizing agent is N-cyclohexyl-2-benzothiazole sulfenamide, and the auxiliary crosslinking agent is stearic acid; the mass ratio of the peroxide crosslinking agent, the vulcanizing agent, and the auxiliary crosslinking agent is 1:0.5:0.5.

[0046] The functional additives include benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants, wherein the mass ratio of the benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants is 0.5:0.1:0.2.

[0047] The preparation method of the aforementioned ultraviolet-resistant and high-voltage-shock-resistant hydrogenated nitrile butadiene rubber includes the following steps:

[0048] (1) Add olefin copolymer to hydrogenated nitrile rubber, stir evenly, add modified filler and crosslinking agent and mix at 120℃ for 20 min;

[0049] (2) Add functional additives and melt mix at 120℃ for 20 min;

[0050] (3) Extrude the mixture into granules.

[0051] Example 3

[0052] A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock comprises the following components in parts by weight: 120 parts hydrogenated nitrile butadiene rubber, 20 parts olefin copolymer, 50 parts modified filler, 6 parts crosslinking agent and 5 parts functional additives.

[0053] The olefin copolymer comprises 1,3-butadiene, styrene, and furanyl olefin, wherein the mass ratio of 1,3-butadiene, styrene, and furanyl olefin is 15:30:8. The preparation method of the olefin copolymer is as follows: under nitrogen protection, monomers 1,3-butadiene, styrene, and furanyl olefin are dissolved in toluene, n-butyllithium is added as an initiator, tetrahydrofuran is added as a cocatalyst, and the mixture is stirred at 80°C for 6 hours. Then, methanol is added to terminate the polymerization reaction. After precipitation, washing, and drying, the olefin copolymer is obtained.

[0054] The furanyl olefin is 2-furanopropyl aldehyde.

[0055] The mass ratio of the monomer, toluene, n-butyllithium, and tetrahydrofuran is 1:20:0.01:0.05.

[0056] The modified filler includes modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth. The preparation method of the modified filler is as follows: prepare a 5wt% silane coupling agent anhydrous ethanol solution, stir for 40 min, add polyester fiber, quartz sand, limestone, and diatomaceous earth, ultrasonically disperse for 40 min, soak for 2 h, and obtain modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth after filtration and drying.

[0057] The quartz sand has a particle size of 5 μm, the limestone has a particle size of 10 μm, and the diatomaceous earth has a particle size of 10 μm; the mass ratio of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1-2:2-4:1-3:1-2, and the mass ratio of the silane coupling agent to the total mass of polyester fiber, quartz sand, limestone, and diatomaceous earth is 3:100.

[0058] The crosslinking agent is a peroxide crosslinking agent, a vulcanizing agent, and an auxiliary crosslinking agent; the peroxide crosslinking agent is di-tert-butyl peroxide, the vulcanizing agent is hexamethylenetetramine, and the auxiliary crosslinking agent is tetraisopropylthiuram disulfide; the mass ratio of the peroxide crosslinking agent, the vulcanizing agent, and the auxiliary crosslinking agent is 3:3:2.

[0059] The functional additives include benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants, wherein the mass ratio of the benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants is 3:0.5:1.

[0060] The preparation method of the aforementioned ultraviolet-resistant and high-voltage-shock-resistant hydrogenated nitrile butadiene rubber includes the following steps:

[0061] (1) Add olefin copolymer to hydrogenated nitrile rubber, stir evenly, add modified filler and crosslinking agent and mix at 170℃ for 10 min.

[0062] (2) Add functional additives and melt mix at 180℃ for 20 min;

[0063] (3) Extrude the mixture into granules.

[0064] Example 4

[0065] A hydrogenated nitrile butadiene rubber resistant to ultraviolet radiation and high voltage electric shock comprises the following components in parts by weight: 110 parts hydrogenated nitrile butadiene rubber, 10 parts olefin copolymer, 50 parts modified filler, 3 parts crosslinking agent and 4 parts functional additives.

[0066] The olefin copolymer comprises 1,3-butadiene, styrene, and furanyl olefin, wherein the mass ratio of 1,3-butadiene, styrene, and furanyl olefin is 10:20:8; the preparation method of the olefin copolymer is as follows: under nitrogen protection, monomers 1,3-butadiene, styrene, and furanyl olefin are dissolved in toluene, n-butyllithium is added as an initiator, tetrahydrofuran is added as a cocatalyst, and the mixture is stirred at 40°C for 4 hours. Then, methanol is added to terminate the polymerization reaction. After precipitation, washing, and drying, the olefin copolymer is obtained.

[0067] The furanyl olefin is 3-(2-furan)propenal.

[0068] The mass ratio of the monomer, toluene, n-butyllithium, and tetrahydrofuran is 1:20:0.001:0.01.

[0069] The modified filler includes modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth. The preparation method of the modified filler is as follows: prepare a 4wt% silane coupling agent anhydrous ethanol solution, stir for 25 min, add polyester fiber, quartz sand, limestone, and diatomaceous earth, ultrasonically disperse for 25 min, soak for 1 h, and obtain modified polyester fiber, modified quartz sand, modified limestone, and modified diatomaceous earth after filtration and drying.

[0070] The quartz sand has a particle size of 5 μm, the limestone has a particle size of 10 μm, and the diatomaceous earth has a particle size of 10 μm; the mass ratio of the polyester fiber, quartz sand, limestone, and diatomaceous earth is 1-2:2-4:1-3:1-2, and the mass ratio of the silane coupling agent to the total mass of polyester fiber, quartz sand, limestone, and diatomaceous earth is 1:100.

[0071] The crosslinking agent is a peroxide crosslinking agent, a vulcanizing agent, and an auxiliary crosslinking agent; the peroxide crosslinking agent is benzoyl peroxide, the vulcanizing agent is N-tert-butyl-2-benzothiazolium sulfenamide, and the auxiliary crosslinking agent is tetraethylthiuram disulfide; the mass ratio of the peroxide crosslinking agent, the vulcanizing agent, and the auxiliary crosslinking agent is 1:3:0.5.

[0072] The functional additives include benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants, wherein the mass ratio of the benzotriazole light stabilizers, phenolic antioxidants, and phosphite antioxidants is 0.5:0.5:1.

[0073] The preparation method of the aforementioned ultraviolet-resistant and high-voltage-shock-resistant hydrogenated nitrile butadiene rubber includes the following steps:

[0074] (1) Add olefin copolymer to hydrogenated nitrile rubber, stir evenly, add modified filler and crosslinking agent and mix at 140℃ for 14 min.

[0075] (2) Add functional additives and melt-mix at 140℃ for 10 min;

[0076] (3) Extrude the mixture into granules.

[0077] Comparative Example 1

[0078] Based on Example 1, no olefin copolymer was added, and the amount of hydrogenated nitrile rubber added was changed to 115 parts, while the rest remained the same as in Example 1.

[0079] Comparative Example 2

[0080] Based on Example 1, polyester fiber was not added to the modified filler, and the mass ratio of quartz sand, limestone and diatomaceous earth was changed to 4.5:2:1.5, while the rest remained the same as in Example 1.

[0081] Comparative Example 3

[0082] Based on Example 1, no quartz sand was added to the modified filler, and the mass ratio of polyester fiber, limestone and diatomaceous earth was changed to 1.5:5:1.5, while the rest remained the same as in Example 1.

[0083] Comparative Example 4

[0084] Based on Example 1, limestone was not added to the modified filler, and the mass ratio of polyester fiber, quartz sand and diatomaceous earth was changed to 1.5:3:3.5, while the rest remained the same as in Example 1.

[0085] Comparative Example 5

[0086] Based on Example 1, diatomaceous earth was not added to the modified filler, and the mass ratio of polyester fiber, quartz sand and limestone was changed to 3:3:2, while the rest remained the same as in Example 1.

[0087] Comparative Example 6

[0088] Based on Example 1, the functional additives do not contain benzotriazole light stabilizers, the mass ratio of phenolic antioxidants and phosphite antioxidants is changed to 2.3:0.6, and the rest remains the same as in Example 1.

[0089] Comparative Example 7

[0090] Based on Example 1, no phenolic antioxidants were added to the functional additives, the mass ratio of benzotriazole light stabilizers and phosphite antioxidants was changed to 2:0.9, and the rest remained the same as in Example 1.

[0091] Comparative Example 8

[0092] Based on Example 1, the functional additives do not contain phosphite antioxidants, the mass ratio of benzotriazole light stabilizer and phenolic antioxidant is changed to 2.6:0.3, and the rest remains the same as in Example 1.

[0093] Performance testing:

[0094] UV aging resistance test: Tensile strength and elongation at break were tested according to GB / T 528-2009 standard using a UVB313 ultraviolet lamp with an irradiance of 0.58 W / cm². 2 The power was 40W, the temperature was 60℃, the relative humidity was 60%, and the aging time was 500h. Then the tensile strength and elongation at break were measured again.

[0095] The formulas for calculating the retention rate of tensile strength and the retention rate of elongation at break are as follows:

[0096] Tensile strength retention rate (%) = Tensile strength after aging / Tensile strength before aging × 100%

[0097] Elongation at break retention rate (%) = Elongation at break after aging / Elongation at break before aging × 100%;

[0098] High voltage shock resistance test: The breakdown strength is tested according to the standard ASTM D149, and the unit is KV / mm.

[0099]

[0100]

[0101] The test results show that the present invention enhances the rubber's resistance to ultraviolet aging and electrical shock by introducing benzene ring and furan ring structures into the olefin copolymer structure and adding modified fillers; and further improves the material's UV resistance by adding benzotriazole light stabilizers, phenolic antioxidants and phosphite antioxidants.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hydrogenated nitrile rubber resistant to ultraviolet and high-voltage electric shock, characterized by: The components include the following weight parts: 80-120 parts of hydrogenated nitrile rubber, 5-20 parts of olefin copolymer, 20-50 parts of modified filler, 2-6 parts of crosslinking agent and 0.8-5 parts of functional additive; The olefin copolymer component includes 1,3-butadiene, styrene and furan-based olefin, and the mass ratio of the 1,3-butadiene, styrene and furan-based olefin is 5-15:20-30:2-8; the preparation method of the olefin copolymer is as follows: under the protection of nitrogen, monomers 1,3-butadiene, styrene and furan-based olefin are dissolved in solvent toluene, n-butyllithium is added as an initiator, and tetrahydrofuran is added as a cocatalyst; after stirring at 30-80℃ for 2-6h, methanol is added to terminate the polymerization reaction; and after precipitation, washing and drying, the olefin copolymer is obtained; The modified filler includes modified polyester fiber, modified quartz sand, modified limestone and modified diatomite, and the preparation method of the modified filler is as follows: 3-5wt% silane coupling agent ethanol solution is prepared, stirred for 20-40min, polyester fiber, quartz sand, limestone and diatomite are added for ultrasonic dispersion treatment for 20-40min, then soaked for 1-2h, and after filtration and drying, the modified polyester fiber, modified quartz sand, modified limestone and modified diatomite are obtained; The functional additive includes benzotriazole light stabilizer, phenolic antioxidant and phosphite antioxidant, and the mass ratio of the benzotriazole light stabilizer, phenolic antioxidant and phosphite antioxidant is 0.5-3:0.1-0.5:0.2-1.

2. The UV resistant and high voltage shock resistant hydrogenated nitrile rubber according to claim 1, characterized in that: The furan-based olefin is at least one of 2-vinyl furan, 2-furan propenoic acid, 2-furan propenal, 3-(2-furan) propenal and 4-(2-furan) 3-buten-2-ketone.

3. The hydrogenated nitrile rubber of claim 1, wherein the hydrogenated nitrile rubber is resistant to ultraviolet rays and high voltage electric shock. The mass ratio of the monomers, toluene, n-butyllithium and tetrahydrofuran is 1:6-20:0.001-0.01:0.01-0.

05.

4. The hydrogenated nitrile rubber of claim 1, wherein the hydrogenated nitrile rubber is resistant to ultraviolet rays and high voltage electric shock. The particle size of the quartz sand is 0.5-10μm, the particle size of the limestone is 1-20μm, and the particle size of the diatomite is 1-15μm; the mass ratio of the polyester fiber, quartz sand, limestone and diatomite is 1-2:2-4:1-3:1-2, and the ratio of the total mass of the silane coupling agent and polyester fiber, quartz sand, limestone and diatomite is 1-3:

100.

5. The UV resistant and high voltage shock resistant hydrogenated nitrile rubber according to claim 1, wherein: The crosslinking agent is peroxide crosslinking agent, vulcanizing agent and auxiliary crosslinking agent; the peroxide crosslinking agent is one of di-tert-butyl peroxide and benzoyl peroxide, the vulcanizing agent is at least one of sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, hexamethylenetetramine and N-tert-butyl-2-benzothiazole sulfenamide, and the auxiliary crosslinking agent is at least one of zinc oxide, stearic acid, tetraisopropylthiuram disulfide, tetraethylthiuram disulfide and dibenzothiazyl disulfide; the mass ratio of the peroxide crosslinking agent, vulcanizing agent and auxiliary crosslinking agent is 1-3:0.5-3:0.5-2.

6. A process for the preparation of a hydrogenated nitrile rubber resistant to ultraviolet and high-voltage electric shock according to any one of claims 1 to 5, characterized in that: The steps include: (1) hydrogenated nitrile rubber is added with olefin copolymer, stirred uniformly, then modified filler and crosslinking agent are added, and mixing is carried out at 120-170℃ for 10-20min; (2) adding functional additives, melting mixing at 120-180°C for 10-20 min; (3) extruding the mixture to granulate.

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