A kind of tensile conductive rubber and its application

Abstract

The present application relates to the field of conductive rubber technology, and specifically discloses a stretch-resistant conductive rubber and its application. The stretch-resistant conductive rubber provided in the present application includes the following components in parts by weight: 20-40 parts of silicone rubber, 50-75 parts of silver-plated glass microspheres, 0.5-3 parts of vulcanizer, and 3-8 parts of antioxidant; the silver-plated glass microspheres are a mixture of 10-30 μm silver-plated glass microspheres and 100-150 μm silver-plated glass microspheres; and the application of the above-mentioned stretch-resistant conductive rubber in stretch-resistant conductive rubber strips and stretch-resistant conductive rubber sheets. The stretch-resistant conductive rubber provided in the present application has the advantages of good mechanical properties, high cost performance, and high and low temperature resistance.

Description

Technical Field

[0001] The present application relates to the technical field of conductive rubber, and in particular to a tensile conductive rubber and its application. Background Art

[0002] With the rapid development of modern science and technology, electronic and electrical equipment are constantly developing towards functionalization, integration, high frequency and digitalization, and the electromagnetic interference hazards brought about by this are becoming more and more serious. Conductive rubber, as a functional rubber that has both conductive and shielding properties, physical and mechanical properties and water-vapor sealing properties, has been widely favored in the communication field and general military field.

[0003] Conductive rubber is made of high-performance silicone rubber as the base material, with various conductive fillers and additives, and is made through a strictly controlled process. At present, common conductive rubbers include tensile conductive rubber, aluminum silver-plated conductive rubber, copper silver-plated conductive rubber, graphite nickel-plated conductive rubber, pure silver conductive rubber, carbon black conductive rubber, etc. Among them, glass silver-plated conductive rubber is widely used due to its good conductivity and low preparation cost. However, its mechanical properties are not ideal, so it is difficult to meet the use requirements in special fields. Therefore, it is urgent to study a conductive rubber with high cost performance and excellent mechanical properties to meet the needs of the communication field and general military field. Summary of the invention

[0004] In order to improve the mechanical properties of conductive rubber, the present application provides a tensile conductive rubber and application thereof.

[0005] In a first aspect, the present application provides a stretch-resistant conductive rubber, which adopts the following technical solution:

[0006] A tensile conductive rubber comprises the following components in parts by weight: 20-40 parts of silicone rubber, 50-75 parts of silver-plated glass microspheres, and 0.5-3 parts of a vulcanizing agent; the silver-plated glass microspheres are a mixture of silver-plated glass microspheres of 10-30 μm and silver-plated glass microspheres of 100-150 μm.

[0007] The present application uses silicone rubber as the base material and silver-plated glass microspheres as the conductive filler. By selecting and adjusting the particle size of the silver-plated glass microspheres, the rubber network and the three-dimensional conductive network structure inside the stretch-resistant conductive rubber can be changed, thereby improving the mechanical properties of the stretch-resistant conductive rubber. Compared with the related art, the present application uses a mixture of 10-30μm silver-plated glass microspheres and 100-150μm silver-plated glass microspheres as the conductive filler of the stretch-resistant conductive rubber, which can significantly reduce the agglomeration force between the silver-plated glass microspheres, increase the bonding force between the silver-plated glass microspheres and the silicone rubber, make the rubber network and the three-dimensional conductive network inside the stretch-resistant conductive rubber more closely interwoven, and make the forces between the molecules more uniform, thereby improving the mechanical properties of the stretch-resistant conductive rubber.

[0008] The stretch-resistant conductive rubber provided in the present application has two network structures inside: one is the polymer chain network structure formed after the silicone rubber is vulcanized, which provides physical and mechanical properties (rebound resilience, compression performance and water vapor sealing performance) for the stretch-resistant conductive rubber; the other is a three-dimensional conductive network formed by the dense accumulation of silver-plated glass microspheres in the rubber network, which gives the conductive rubber excellent conductive and shielding properties.

[0009] Silicone rubber is a high-temperature resistant rubber with excellent performance. Although its strength at room temperature is only half of that of natural rubber or synthetic rubber, it can still maintain a certain flexibility, resilience and surface hardness in an environment of -70℃ to 200℃, and its mechanical properties do not change significantly, so it is very suitable for the aerospace field. Silver-plated glass microspheres use chemical surface treatment technology to form a certain thickness of silver coating on the surface of glass microspheres, so they have excellent conductive properties. Compared with silver-plated aluminum powder, nickel-plated graphite, etc. in related technologies, the silver-plated glass microspheres have the advantages of low density and low cost. The addition of antioxidants can improve the oxidation resistance of conductive rubber.

[0010] In some embodiments, the weight ratio of the 10-30 μm silver-coated glass microspheres to the 100-150 μm silver-coated glass microspheres can be (1.5-2.5):1, (1.5-3):1, (1.5-4):1, (1.5-5):1, (2.5-3):1, (2.5-4):1, (2.5-5):1, (3-4):1, (3-5):1, or (4-5):1.

[0011] Preferably, the weight ratio of the 10-30 μm silver-coated glass microspheres to the 100-150 μm silver-coated glass microspheres is (2.5-4):1.

[0012] In some specific embodiments, the weight ratio of the 10-30 μm silver-coated glass microspheres to the 100-150 μm silver-coated glass microspheres can also be 1.5:1, 2.5:1, 3:1, 4:1 or 5:1.

[0013] The present application can significantly improve the mechanical properties of the conductive rubber by adjusting the weight ratio of the two silver-plated glass microspheres of different particle sizes and controlling the weight ratio of the two silver-plated glass microspheres of different particle sizes within the above range. The silver-plated glass microspheres of 100-150 μm can form a larger three-dimensional conductive network structure framework, and the silver-plated glass microspheres of 10-30 μm can be dispersed and filled in the polymer chain network structure and the three-dimensional conductive network structure framework, reducing the agglomeration force between the silver-plated glass microspheres, making the silver-plated glass microspheres more evenly dispersed, thereby ensuring that the internal stress between the silver-plated glass microspheres and the silver-plated glass microspheres in the tensile conductive rubber and between the silver-plated glass microspheres and the silicone rubber is basically the same, thereby improving the mechanical properties of the electrical rubber.

[0014] Preferably, the weight ratio of the silicone rubber to the silver-coated glass microspheres is 1:(2-3).

[0015] In some embodiments, the weight ratio of the silicone rubber to the silver-coated glass microspheres may also be 1:(2-2.5) or 1:(2.5-3).

[0016] In some specific embodiments, the weight ratio of the silicone rubber to the silver-coated glass microspheres can also be 1:2, 1:2.5 or 1:3.

[0017] When the amount of silver-plated glass microspheres is too large, the agglomeration force between the silver-plated glass microspheres increases, and the bonding force between the silver-plated glass microspheres and the silicone rubber decreases, resulting in the deterioration of the conductivity and mechanical properties of the stretch-resistant conductive rubber. Therefore, the present application controls the weight ratio of silicone rubber and silver-plated glass microspheres within the above range, which can ensure that the silver-plated glass microspheres are evenly dispersed in the polymer chain network structure formed by the silicone rubber, and make the mechanical strength between the silver-plated glass microspheres and the silver-plated glass microspheres and the silicone rubber basically the same, thereby obtaining a stretch-resistant conductive rubber with excellent conductivity and mechanical properties.

[0018] Preferably, the stretch-resistant conductive rubber further comprises an auxiliary agent; the auxiliary agent is selected from triethanolamine and sodium carboxymethyl cellulose.

[0019] In some specific embodiments, the auxiliary agent can be triethanolamine, sodium carboxymethylcellulose, or a mixture of triethanolamine and sodium carboxymethylcellulose.

[0020] Preferably, the weight ratio of the triethanolamine to the sodium carboxymethyl cellulose is 1:(1.3-1.8).

[0021] The stretch-resistant conductive rubber provided in the present application also includes an additive, and the weight ratio of triethanolamine and the sodium carboxymethyl cellulose is controlled within the above range. Through the respective reinforcement and bonding effects between the two and the compounding effect between the two, the mechanical properties of the stretch-resistant conductive rubber can be significantly increased.

[0022] In some specific embodiments, the weight ratio of the triethanolamine to the sodium carboxymethyl cellulose may be 1:1.3, 1:1.5 or 1:1.8.

[0023] Preferably, the antioxidant is selected from 6-ethoxy-2,2,4-trimethyl-1,3-quinoline dioxide and 2-thiol-methylbenzimidazole.

[0024] Preferably, the vulcanizing agent is an organic peroxide.

[0025] Furthermore, the organic peroxide may be benzoyl peroxide, dicumyl peroxide or di-tert-butyl peroxide.

[0026] Preferably, the silicone rubber is selected from methyl silicone rubber, methyl vinyl phenyl silicone rubber, fluorosilicone rubber and methyl vinyl silicone rubber.

[0027] The preparation method of the above-mentioned stretch-resistant conductive rubber is as follows: first, silicone rubber is added to a rubber mixing equipment for mixing, and then silver-plated glass microspheres, additives and antioxidants are added in sequence, mixed for 10-20 minutes, and thinned 2-3 times; then a vulcanizing agent is added, mixed for 20-30 minutes, and thinned 3-5 times to obtain a premix; the premix is ​​placed on a flat vulcanizer for one-stage vulcanization to obtain a rubber sheet, the first-stage vulcanization temperature is 120-160°C, and the first-stage vulcanization time is 15-30 minutes; then the rubber sheet is placed in an electric hot air drying oven for two-stage vulcanization, the second-stage vulcanization temperature is 180-210°C, and the second-stage vulcanization time is 1-1.5 hours, and the stretch-resistant conductive rubber can be obtained after the vulcanization is completed.

[0028] In a second aspect, the present application provides an application of the stretch-resistant conductive rubber in stretch-resistant conductive rubber strips and stretch-resistant conductive rubber sheets.

[0029] Furthermore, the stretch-resistant conductive rubber strip may be circular, rectangular, tubular, D-shaped, U-shaped or P-shaped depending on the cross section.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. The present application uses mixed silver-plated glass microspheres of 10-30μm and 100-150μm silver-plated glass microspheres, silicone rubber, etc. to prepare stretch-resistant conductive rubber. The obtained stretch-resistant conductive rubber contains two network structures inside, one is a polymer chain network structure formed after the silicone rubber is vulcanized, and the other is a three-dimensional conductive network formed by the dense accumulation of silver-plated glass microspheres in the rubber network. The stretch-resistant conductive rubber has excellent conductivity and mechanical properties, with a resistivity of <0.01Ω·min, a tensile strength of ≥1.5Mpa, an elongation at break of 100-300%, and a compression deformation rate of ≤31%.

[0032] 2. In this application, by controlling the particle size and ratio of silver-plated glass microspheres, and controlling the weight ratio of 10-30μm silver-plated glass microspheres to 100-150μm silver-plated glass microspheres within the range of (2.5-4):1, the tensile conductive rubber obtained has lower resistivity and better mechanical properties. Its resistivity is <0.005Ω·min, tensile strength is ≥1.7Mpa, elongation at break is 160-280%, and compression deformation rate is ≤30%.

[0033] 3. In the present application, the weight ratio of the silicone rubber to the silver-coated glass microspheres is controlled within the range of 1: (2-3), and the three-dimensional conductive network of the obtained stretch-resistant conductive rubber is closely interwoven with the polymer chain network structure, and the forces between the molecules are uniform, and the obtained stretch-resistant conductive rubber has excellent mechanical properties.

[0034] 4. The present application further adds a mixture of triethanolamine and sodium carboxymethyl cellulose to the stretch-resistant conductive rubber as an auxiliary agent for the stretch-resistant conductive rubber, and controls the weight ratio of triethanolamine to sodium carboxymethyl cellulose to be between 1: (1.3-1.8), which can further improve the tensile strength of the stretch-resistant conductive rubber and reduce the compression deformation rate, so that the tensile strength of the stretch-resistant conductive rubber is ≥2.1Mpa and the compression deformation rate is 28%.

[0035] 5. The stretch-resistant conductive rubber provided in this application has a high cost-effectiveness. Compared with the glass-plated conductive rubber in the related technology, it has the advantages of high and low temperature resistance, low resistivity, high tensile strength, and low compression deformation rate. Therefore, it can be widely used in the communication field and general military field. DETAILED DESCRIPTION

[0036] The present application provides a stretch-resistant conductive rubber, which comprises the following components in parts by weight: 20-40 parts of silicone rubber, 50-75 parts of silver-plated glass microspheres, 0.5-3 parts of a vulcanizer, and 3-8 parts of an antioxidant; the silver-plated glass microspheres are a mixture of 10-30 μm silver-plated glass microspheres and 100-150 μm silver-plated glass microspheres; the weight ratio of the 10-30 μm silver-plated glass microspheres to the 100-150 μm silver-plated glass microspheres is (2.5-4):1; the weight ratio of silicone rubber to the silver-plated glass microspheres is 1:(2-3); further, the stretch-resistant conductive rubber also comprises an auxiliary agent; the auxiliary agent is selected from triethanolamine and sodium carboxymethyl cellulose; further, the weight ratio of triethanolamine to sodium carboxymethyl cellulose is 1:(1.3-1.8).

[0037] The preparation method of the stretch-resistant conductive rubber is as follows: first, silicone rubber is added to a rubber mixing device for mixing, and then silver-plated glass microspheres, antioxidants and additives are added in sequence, mixed for 10-20 minutes, and thinned 2-3 times; then a vulcanizing agent is added, mixed for 20-30 minutes, and thinned 3-5 times to obtain a premix; the premix is ​​placed on a flat vulcanizer for one-stage vulcanization to obtain a rubber sheet, the first-stage vulcanization temperature is 120-160°C, and the first-stage vulcanization time is 15-30 minutes; then the rubber sheet is placed in an electric hot air drying oven for two-stage vulcanization, the second-stage vulcanization temperature is 180-210°C, and the second-stage vulcanization time is 1-1.5 hours, and the stretch-resistant conductive rubber can be obtained after the vulcanization is completed.

[0038] The present application also provides a stretch-resistant conductive rubber strip made using the above-mentioned stretch-resistant conductive rubber.

[0039] The method for preparing the stretch-resistant conductive rubber strip is as follows: the stretch-resistant conductive rubber is sent to a rubber extrusion device, and then extruded at a speed of 5-6 m / min to obtain a round stretch-resistant conductive rubber strip.

[0040] In the specific embodiments of the present application, the silicone rubber is methyl vinyl silicone rubber, model 110, and molecular weight 150,000-1,000,000; the vulcanizing agent is benzoyl peroxide or di-tert-butyl peroxide, the CAS number of benzoyl peroxide is 94-36-0, and the CAS number of di-tert-butyl peroxide is 110-05-4; the remaining raw materials, reagents, solvents, etc. can be obtained commercially.

[0041] The present application is further described in detail below in combination with embodiments, application examples and performance testing experiments. Example

[0042] Examples 1-5

[0043] Embodiments 1-5 respectively provide a tensile-resistant conductive rubber.

[0044] The difference between the above embodiments is that the weight ratio of the silver-coated glass microspheres of 10-30 μm to the silver-coated glass microspheres of 100-150 μm is specifically shown in Table 1.

[0045] The preparation method of the stretch-resistant conductive rubber provided in Example 1-5 is as follows: first, add 25g of silicone rubber to a rubber mixer and mix for 10-15min, then add 50g of silver-plated glass microspheres, 5g of antioxidant and 5g of auxiliary agent, mix for 10-20min, and pass through 2-3 times; then add 1g of vulcanizing agent, mix for 20-30min, and pass through 3-5 times to obtain a premix; the premix is ​​placed on a flat vulcanizer for a first stage of vulcanization to obtain a rubber sheet, the first stage of vulcanization temperature is 150°C, and the first stage of vulcanization time is 20min; then the rubber sheet is placed in an electric heating blast drying oven for a second stage of vulcanization, the second stage of vulcanization temperature is 200°C, and the second stage of vulcanization time is 1.5h, and the stretch-resistant conductive rubber can be obtained after the vulcanization is completed. In Example 1-5, the auxiliary agent is triethanolamine, and the antioxidant is 6-ethoxy-2,2,4-trimethyl-1,3-dioxide quinoline.

[0046] The preparation method of the silver-coated glass microspheres in Examples 1-5 is as follows: silver-coated glass microspheres of 10-30 μm and silver-coated glass microspheres of 100-150 μm are mixed according to the addition amounts in Table 1 to obtain silver-coated glass microspheres.

[0047] Table 1 Weight ratio of 10-30 μm and 100-150 μm silver-coated glass microspheres in Examples 1-5

[0048] Example 6

[0049] Example 6 provides a tensile-resistant conductive rubber.

[0050] The difference between the above embodiment and embodiment 3 is that in embodiment 6, the added amount of silicone rubber is 25 g, and the added amount of silver-plated glass microspheres is 62.5 g; that is, the weight ratio of silicone rubber to silver-plated glass microspheres is 1:2.5. Example 7

[0051] Example 7 provides a tensile-resistant conductive rubber.

[0052] The difference between the above embodiment and embodiment 3 is that in embodiment 7, the added amount of silicone rubber is 25 g, and the added amount of silver-plated glass microspheres is 75 g; that is, the weight ratio of silicone rubber to silver-plated glass microspheres is 1:3. Example 8

[0053] Example 8 provides a tensile-resistant conductive rubber.

[0054] The difference between the above embodiment and embodiment 6 is that the auxiliary agent used in embodiment 8 is sodium carboxymethyl cellulose. Example 9

[0055] Example 9 provides a tensile-resistant conductive rubber.

[0056] The difference between the above embodiment and embodiment 6 is that the auxiliary agent used in embodiment 9 is a mixture of triethanolamine and sodium carboxymethyl cellulose; and the weight ratio of triethanolamine to sodium carboxymethyl cellulose in embodiment 11 is 1:1.3. Example 10

[0057] Embodiment 10 provides a tensile-resistant conductive rubber.

[0058] The difference between the above embodiment and embodiment 6 is that the auxiliary agent used in embodiment 10 is a mixture of triethanolamine and sodium carboxymethyl cellulose; the weight ratio of triethanolamine to sodium carboxymethyl cellulose in embodiment 10 is 1:1.5. Embodiment 11

[0059] Example 11 provides a tensile-resistant conductive rubber.

[0060] The difference between the above embodiment and embodiment 6 is that the auxiliary agent used in embodiment 11 is a mixture of triethanolamine and sodium carboxymethyl cellulose; the weight ratio of triethanolamine to sodium carboxymethyl cellulose in embodiment 11 is 1:1.8. Comparative Example Comparative Example 1

[0061] Comparative Example 1 provides a tensile-resistant conductive rubber.

[0062] The difference between the comparative example and Example 3 is the addition amount of each component in the tensile conductive rubber.

[0063] The addition amount of each component in Comparative Example 1 is: 25g silicone rubber, 40g silver-plated glass microspheres, 5g antioxidant, 5g auxiliary agent, and 1g vulcanizing agent. Comparative Example 2

[0064] Comparative Example 2 provides a tensile-resistant conductive rubber.

[0065] The difference between the comparative example and Example 3 is the addition amount of each component in the tensile conductive rubber.

[0066] The addition amount of each component in Comparative Example 2 is: 10g silicone rubber, 50g silver-plated glass microspheres, 5g antioxidant, 5g auxiliary agent, and 1g vulcanizing agent. Comparative Example 3

[0067] Comparative Example 3 provides a tensile-resistant conductive rubber.

[0068] The difference between the comparative example and Example 3 is the addition amount of each component in the tensile conductive rubber.

[0069] The addition amounts of the components in Comparative Example 3 are: 25 g of silicone rubber, 50 g of silver-plated glass microspheres, 5 g of antioxidant, and 1 g of vulcanizing agent. Comparative Example 4

[0070] Comparative Example 4 provides a tensile-resistant conductive rubber.

[0071] The difference between the comparative example and Example 3 is that the silver-coated glass microspheres are silver-coated glass microspheres with a diameter of 10-30 μm. Comparative Example 5

[0072] Comparative Example 5 provides a tensile-resistant conductive rubber.

[0073] The difference between the comparative example and Example 3 is that the silver-coated glass microspheres are silver-coated glass microspheres with a diameter of 100-150 μm.

[0074] Application Examples

[0075] Application Example 1-16

[0076] Application Examples 1-16 each provide a stretch-resistant conductive rubber strip.

[0077] The stretch-resistant conductive rubber strips provided in Application Examples 1-11 are prepared using the stretch-resistant conductive rubber provided in Examples 1-11. The stretch-resistant conductive rubber strips provided in Application Examples 12-16 are prepared using the stretch-resistant conductive rubber provided in Comparative Examples 1-5.

[0078] The preparation method of the above-mentioned stretch-resistant conductive rubber strip is: the stretch-resistant conductive rubber is sent to a rubber extruder, and then extruded at a speed of 5-6m / min to obtain a round stretch-resistant conductive rubber strip.

[0079] Performance testing

[0080] The resistivity, tensile strength, elongation at break and compression deformation rate of the tensile conductive rubber strips obtained in Example 1-16 were tested, and the results are shown in Table 2.

[0081] The resistivity (volume resistivity) test method refers to MIL-G-83528 Para.4.6.11; the tensile strength test method refers to ASTM D412; the elongation at break test method refers to GB / T 10654-2001; the compression deformation test method refers to ASTM D395.

[0082] Table 2 Performance test results of tensile conductive rubber strips obtained in application examples 1-16

[0083]

[0084] According to the test results of Application Examples 1-5 and Application Examples 15-16, the comprehensive performance of the conductive properties and mechanical properties of the stretch-resistant conductive rubber strip obtained in Application Examples 1-5 is better than the comprehensive performance of the conductive properties and mechanical properties of the stretch-resistant conductive rubber strip obtained in Application Examples 15-16, indicating that the present application uses a mixture of 10-30μm silver-plated glass microspheres and 100-150μm silver-plated glass microspheres as silver-plated glass microspheres for stretch-resistant conductive rubber, and can prepare a stretch-resistant conductive rubber with excellent conductive properties, high tensile strength and elongation at break, and low compression deformation rate; further comparison shows that the tensile strength of the stretch-resistant conductive rubber strip obtained in Application Examples 2-4 is ≥1.7Mpa, the elongation at break is 160-280%, and the compression deformation rate is ≤30%; while the tensile strength of the stretch-resistant conductive rubber strip obtained in Application Example 1 is 1.5Mpa, the elongation at break is 127%, and the compression deformation rate is 31%, and the resistivity of the stretch-resistant conductive rubber strip obtained in Application Example 5 is 0.007Ω·min. Therefore, it is explained that the present application controls the weight ratio of 10-30 μm silver-coated glass microspheres to 100-150 μm silver-coated glass microspheres to be between 1: (2.5-4), so as to obtain a tensile conductive rubber with excellent conductive and mechanical properties.

[0085] According to the test results of Application Examples 3, 6-7, and 12-14, the comprehensive performance of the conductive properties and mechanical properties of the stretch-resistant conductive rubber strips obtained in Application Examples 3 and 6-7 is better than the comprehensive performance of the conductive properties and mechanical properties of the stretch-resistant conductive rubber strips obtained in Application Examples 12-14. Therefore, it is explained that the weight ratio of the stretch-resistant conductive rubber is controlled within the following range: 20-40 parts of silicone rubber, 50-75 parts of silver-plated glass microspheres, 0.5-3 parts of vulcanizer, and 3-8 parts of antioxidant, and the weight ratio of silicone rubber to silver-plated glass microspheres is controlled between 1: (2-3), so that a stretch-resistant conductive rubber having both excellent conductive properties and good mechanical properties can be obtained.

[0086] According to the test results of Application Examples 6 and 8-11, the mechanical properties of the stretch-resistant conductive rubber strips provided in Application Examples 6 and 8, which are made with only one additive, are lower than the mechanical properties of the stretch-resistant conductive rubber strips provided in Application Examples 9-11, which are made with two additives. This indicates that when the present application uses triethanolamine and sodium carboxymethyl cellulose as two additives and controls the weight ratio of triethanolamine to sodium carboxymethyl cellulose within the range of 1: (1.3-1.8), a stretch-resistant conductive rubber with better mechanical properties can be obtained.

[0087] In summary, the present application provides a stretch-resistant conductive rubber prepared by using silicone rubber, silver-plated glass microspheres, a vulcanizing agent and an antioxidant. The stretch-resistant conductive rubber has excellent conductivity and mechanical properties, and its resistivity is <0.01Ω·min, tensile strength is ≥1.5Mpa, elongation at break is 100-300%, and compression deformation is ≤31%. By further controlling the weight ratio of 10-30μm silver-plated glass microspheres and 100-150μm silver-plated glass microspheres within the range of (2.5-4):1, the weight ratio of silicone rubber and silver-plated glass microspheres within the range of 1:(2-3), and the weight ratio of triethanolamine and sodium carboxymethyl cellulose within the range of 1:(1.3-1.8), a stretch-resistant conductive rubber with better conductivity and mechanical properties can be obtained.

[0088] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A tensile conductive rubber, characterized in that: The invention comprises the following components in parts by weight: 20-40 parts of silicone rubber, 50-75 parts of silver-plated glass microspheres, 0.5-3 parts of a vulcanizing agent, and 3-8 parts of an antioxidant; the silver-plated glass microspheres are a mixture of silver-plated glass microspheres of 10-30 μm and silver-plated glass microspheres of 100-150 μm in a weight ratio of (2.5-4):1; The weight ratio of the silicone rubber to the silver-coated glass microspheres is 1:(2-3).

2. The tensile conductive rubber according to claim 1, characterized in that: The stretch-resistant conductive rubber also includes an auxiliary agent; the auxiliary agent is selected from triethanolamine and sodium carboxymethyl cellulose.

3. The tensile conductive rubber according to claim 2, characterized in that: The weight ratio of the triethanolamine to the sodium carboxymethyl cellulose is 1:(1.3-1.8).

4. The tensile conductive rubber according to claim 1, characterized in that: The vulcanizing agent is an organic peroxide.

5. The tensile conductive rubber according to claim 1, characterized in that: The silicone rubber is selected from methyl silicone rubber, methyl vinyl phenyl silicone rubber, fluorosilicone rubber and methyl vinyl silicone rubber.

6. Use of the stretch-resistant conductive rubber according to any one of claims 1 to 5 in a stretch-resistant conductive rubber strip or a stretch-resistant conductive rubber sheet.

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