Tear-resistant conductive rubber
By adding components such as carbon nanotubes to rubber, a tear-resistant and conductive rubber was prepared, which solved the problems of attenuation and insufficient tear resistance of traditional conductive agents, and achieved excellent conductivity and tear resistance, meeting the durability requirements of special protective footwear.
Patent Information
- Application Number
- CN202411299172.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional conductive agents decay in rubber over time, making it difficult to meet the long-term conductivity requirements of the special footwear industry. At the same time, the insufficient tear resistance of rubber affects the abrasion resistance of the sole and the bonding strength between the upper and the sole.
Tear-resistant conductive rubber is prepared by using carbon nanotubes as conductive additives, combined with raw rubber, reinforcing agents, stearic acid, antioxidants, anti-frost agents, PEG-4000, abrasion resistant agents and vulcanization accelerators, through intensive mixing and vulcanization processes.
It significantly improves the tear resistance and electrical conductivity of rubber while maintaining tensile and abrasion resistance, meeting the durability requirements of special protective footwear.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of tear-resistant conductive rubber, belong to special rubber product technical field. BACKGROUND
[0002] For the sole of special protective shoes and boots, the tear resistance of rubber is of great significance, directly affecting the wear resistance, impact resistance and the bonding strength of upper and sole, so excellent tear resistance plays a decisive role in improving the durability of special protective shoes and boots. In addition, special post work shoes and boots are required to have good antistatic performance or conductive performance, and traditional methods such as adding conductive carbon black or conductive agent can improve the conductive performance, but it will decay over time, which is difficult to meet the demand of special shoemaking industry for rubber products. SUMMARY
[0003] The purpose of the present application is to provide a kind of tear-resistant conductive rubber, which has good tear resistance and conductivity.
[0004] The tear-resistant conductive rubber provided by the present application is made of the following mass parts of raw materials: Raw rubber 100phr; reinforcing agent 45-50phr; stearic acid 1.0-1.5phr; antioxidant 1.2-1.5phr; antioxidant 1.0-1.3phr; anti-frost agent 1.0-1.5phr; carbon nanotube 2.0-5.0phr; PEG-4000 4.0-5.0phr; wear-resistant agent 4.0-5.0phr; vulcanization accelerator 2.0-2.5phr; vulcanizing agent 1.5-2.0phr.
[0005] Preferably, the mass parts of the raw materials of the tear-resistant conductive rubber are as follows: Raw rubber 100phr; reinforcing agent 45phr; stearic acid 1.0phr; antioxidant 1.2phr; antioxidant 1.2phr; anti-frost agent 1.5phr; carbon nanotube 2.5-5phr; PEG-4000 4.0phr; wear-resistant agent 4.0phr; vulcanization accelerator 2.0phr; vulcanizing agent 1.5phr; Raw rubber 100phr; reinforcing agent 45phr; stearic acid 1.0phr; antioxidant 1.2phr; antioxidant 1.2phr; anti-frost agent 1.5phr; carbon nanotube 2.5phr; PEG-4000 4.0phr; wear-resistant agent 4.0phr; vulcanization accelerator 2.0phr; vulcanizing agent 1.5phr; Raw rubber 100 phr; reinforcing agent 45 phr; stearic acid 1.0 phr; antioxidant 1.2 phr; anti-skin agent 1.5 phr; carbon nanotube 5 phr; PEG-4000 4.0 phr; wear-resistant agent 4.0 phr; vulcanization accelerator 2.0 phr; vulcanizing agent 1.5 phr.
[0006] Preferably, the raw rubber is composed of nitrile rubber and cis-butadiene rubber, and the mass ratio of each component is as follows: Nitrile rubber 80-90 phr; cis-butadiene rubber 10-20 phr.
[0007] Preferably, the reinforcing agent is precipitated white carbon black.
[0008] Preferably, the vulcanization accelerator is composed of accelerators DM-80, D-80, and TS-80, and the mass ratio of each component is as follows: Accelerator DM-80 1.5 phr; accelerator D-80 0.5 phr; accelerator TS-80 0.3 phr.
[0009] The antioxidant is antioxidant SP.
[0010] Preferably, the antioxidant is antioxidant 1010.
[0011] Preferably, the anti-skin agent is LR-638.
[0012] Preferably, the wear-resistant agent is Si-69.
[0013] Preferably, the vulcanizing agent is sulfur.
[0014] The carbon nanotube used in the present application has a diameter of 4-8 nm and a length of 10-20 µm.
[0015] The present application significantly improves the tearing and conductive properties of rubber materials by adding carbon nanotubes, and the tensile and wear-resistant properties remain basically unchanged. The products prepared from the tear-resistant conductive rubber of the present application have excellent tear-resistant conductive rubber materials, meeting the performance requirements of related products. DETAILED DESCRIPTION
[0016] The experimental methods used in the following examples are conventional methods unless otherwise specified.
[0017] The materials, reagents, etc. used in the following examples can be obtained from commercial channels unless otherwise specified.
[0018] The carbon nanotubes used in the following examples have a diameter of 4-8 nm and a length of 10-20 µm.
[0019] Comparative Example 1 and Examples 2, 1 to 4, rubber materials were prepared according to the formulations in Table 1.
[0020] Table 1 Comparative Example, Example Rubber Outsole Formulation
[0021] The raw rubber, reinforcing agent, stearic acid, antioxidant, anti-aging agent, anti-wear agent, PEG, etc. were weighed according to the formulation and added to the internal mixer in batches for masterbatch mixing. Carbon nanotubes, vulcanizing agent and vulcanization accelerator were added to the open mill for mixing, and the rubber material of the application was prepared by mixing uniformly, rolling three times, and vulcanizing at 160°C for 8 minutes on a flat vulcanizing machine.
[0022] The properties of each product are shown in Table 2.
[0023] Table 2 Rubber Semi-finished Product Properties
[0024] As can be seen from the data in Table 2, Comparative Example 1 is a blank control sample. After adding carbon nanotubes by adjusting the formulation, the tear and electrical conductivity of the rubber material are significantly improved. The tear resistance of the rubber material is increased by about 16% and 48% when 2.5 and 5.0 phr of carbon nanotubes are added, respectively, and the electrical resistance is 10 5 Ω, 10 4 Ω order of magnitude. In addition, the tensile and wear resistance remain basically unchanged. After adding 7.5 phr of carbon nanotubes, the electrical conductivity and tear resistance of the composite material are improved, but the tensile strength and hardness are significantly decreased, which does not have practical value. By comparing the properties of the composite materials with 2.5 and 5.0 phr of carbon nanotubes, and considering the cost, Examples 1 and 2 are preferred in actual production. When 2.5 phr of carbon nanotubes is added, excellent tear-resistant and conductive rubber materials can be obtained, which meet the performance requirements of related products.
Claims
1. A tear-resistant conductive rubber, made from the following raw materials in parts by weight: Raw rubber 100 phr; reinforcing agent 45-50 phr; stearic acid 1.0-1.5 phr; antioxidant 1.2-1.5 phr; anti-oxidant 1.0-1.3 phr; anti-frost agent 1.0-1.5 phr; carbon nanotubes 2.0-5.0 phr; PEG-4000 4.0-5.0 phr; abrasion resistant agent 4.0-5.0 phr; vulcanization accelerator 2.0-2.5 phr; vulcanizing agent 1.5-2.0 phr.
2. The tear-resistant conductive rubber according to claim 1, characterized in that: The raw rubber is composed of nitrile rubber and butadiene rubber, and the mass ratios of each component are as follows: Nitrile rubber 80-90 phr; Butadiene rubber 10-20 phr.
3. The tear-resistant conductive rubber according to claim 1 or 2, characterized in that: The reinforcing agent is precipitated silica.
4. The tear-resistant conductive rubber according to any one of claims 1-3, characterized in that: The vulcanization accelerator is composed of accelerators DM-80, D-80, and TS-80, and the mass fractions of each component are as follows: Accelerator DM-80 1.5 phr; Accelerator D-800.5 phr; Accelerator TS-800.3phr.
5. The tear-resistant conductive rubber according to any one of claims 1-4, characterized in that: The antioxidant is antioxidant SP.
6. The tear-resistant conductive rubber according to any one of claims 1-5, characterized in that: The antioxidant is antioxidant 1010.
7. The tear-resistant conductive rubber according to any one of claims 1-6, characterized in that: The anti-frost agent is LR-638; The wear-resistant agent is Si-69; The vulcanizing agent is sulfur.