Buna-N rubber, also known as nitrile rubber or NBR, is a synthetic rubber copolymer composed of acrylonitrile (ACN) and butadiene. It is renowned for its excellent resistance to oils, fuels, and other chemicals, making it a popular choice in various industrial applications. The proportion of acrylonitrile in the copolymer can vary, typically ranging from 18% to 50%, which influences the rubber's properties. Higher acrylonitrile content enhances oil resistance but reduces flexibility and low-temperature performance. Buna-N rubber is widely used in the automotive and aeronautical industries for manufacturing fuel and oil handling hoses, seals, gaskets, and o-rings. Its resistance to swelling and degradation in petroleum-based fluids makes it ideal for these applications. Additionally, it is employed in the production of disposable lab, cleaning, and examination gloves due to its chemical resistance. The material exhibits good physical properties, including abrasion resistance and tensile strength, although it is less resistant to ozone, sunlight, and weathering compared to some other synthetic rubbers. To improve these properties, Buna-N is often blended with other materials or treated with protective additives. Buna-N rubber is also used in the production of adhesives, sealants, and molded goods. Its versatility and cost-effectiveness make it a preferred choice in many sectors, including the oil and gas, automotive, and manufacturing industries. Despite its many advantages, Buna-N rubber is not suitable for applications involving exposure to strong acids, ketones, or chlorinated hydrocarbons. It also has limited temperature resistance, typically functioning well between -40°C and 108°C (-40°F to 226°F). For applications requiring higher temperature resistance or exposure to harsh environmental conditions, other materials like Viton or silicone rubber may be more appropriate.

Buna-N rubber, also known as nitrile rubber or NBR, resists oils and fuels due to its unique chemical composition. It is a copolymer made from acrylonitrile and butadiene. The presence of acrylonitrile in the polymer chain is crucial for its oil and fuel resistance. Acrylonitrile provides polar characteristics to the rubber, which enhances its compatibility with non-polar substances like oils and fuels. The higher the acrylonitrile content, the better the resistance to oils and fuels, as it reduces the rubber's permeability to these substances. The butadiene component contributes to the rubber's flexibility and resilience, allowing it to maintain its mechanical properties even when exposed to harsh environments. This balance between acrylonitrile and butadiene ensures that Buna-N rubber can withstand swelling, degradation, and loss of mechanical strength when in contact with oils and fuels. Additionally, the cross-linked structure of Buna-N rubber enhances its chemical resistance. Cross-linking creates a three-dimensional network within the rubber, which limits the penetration of oils and fuels, further improving its resistance. This structure also helps maintain the rubber's integrity and prevents it from dissolving or breaking down. Overall, the combination of polar acrylonitrile, flexible butadiene, and a cross-linked network makes Buna-N rubber highly effective in resisting oils and fuels, making it a preferred material for applications like seals, gaskets, hoses, and other components in automotive and industrial settings.

Buna-N rubber, also known as nitrile rubber or NBR, is widely used in the automotive industry due to its excellent resistance to oils, fuels, and other chemicals. Here are its primary applications: 1. **Seals and Gaskets**: Buna-N is commonly used for manufacturing seals and gaskets in engines, fuel systems, and hydraulic systems. Its resistance to oil and fuel makes it ideal for preventing leaks and ensuring the integrity of these systems. 2. **Hoses**: NBR is used in the production of fuel hoses, oil hoses, and hydraulic hoses. Its ability to withstand high temperatures and resist degradation from oil and fuel ensures the durability and reliability of these components. 3. **O-rings**: Buna-N O-rings are used in various automotive applications, including fuel injectors, carburetors, and air conditioning systems. They provide effective sealing solutions due to their flexibility and resistance to compression set. 4. **Diaphragms**: In fuel pumps and carburetors, Buna-N diaphragms are used due to their ability to maintain flexibility and function in the presence of fuels and oils. 5. **Vibration Dampening**: NBR is used in engine mounts and other components to dampen vibrations and reduce noise, thanks to its good mechanical properties and resilience. 6. **Belts**: Timing belts and other drive belts in vehicles may incorporate Buna-N for its strength and resistance to oil and heat, ensuring efficient power transmission and longevity. 7. **Bushings**: Used in suspension systems, NBR bushings help absorb shocks and reduce wear, contributing to a smoother ride and improved vehicle handling. 8. **Fuel System Components**: Due to its compatibility with gasoline and diesel, Buna-N is used in various fuel system components, ensuring safe and efficient fuel delivery. These applications highlight Buna-N rubber's versatility and essential role in enhancing the performance and reliability of automotive systems.

Yes, Buna-N rubber, also known as nitrile rubber, is generally suitable for use with water and mild chemicals. It is a synthetic rubber copolymer made from acrylonitrile and butadiene, which provides good resistance to oils, fuels, and other chemicals. Buna-N exhibits moderate resistance to water, making it suitable for applications involving water exposure. However, its performance can vary depending on the concentration and temperature of the chemicals involved. Buna-N rubber is particularly valued for its resistance to petroleum-based oils and fuels, which makes it a popular choice in the automotive and aerospace industries. It also offers good abrasion resistance and tensile strength, contributing to its durability in various applications. When it comes to mild chemicals, Buna-N can handle a range of substances, including some acids and bases, but it is not suitable for strong acids, strong oxidizing agents, or certain solvents like ketones and chlorinated hydrocarbons. Its resistance to chemicals is influenced by the acrylonitrile content; higher acrylonitrile content generally improves chemical resistance but may reduce flexibility. In water applications, Buna-N performs well at room temperature but may degrade over time if exposed to high temperatures or steam. It is important to consider the specific conditions of use, such as temperature, pressure, and chemical concentration, to ensure Buna-N rubber is the right choice for a given application. Overall, while Buna-N rubber is suitable for many applications involving water and mild chemicals, it is essential to evaluate the specific requirements and environmental conditions to ensure optimal performance and longevity.

Buna-N rubber, also known as nitrile rubber, is highly durable, especially in environments involving oils, fuels, and other chemicals. Its durability is primarily due to its excellent resistance to petroleum-based oils and fuels, which makes it a preferred choice in automotive and aerospace industries for seals, gaskets, and hoses. Compared to natural rubber, Buna-N offers superior resistance to oil and fuel, but it is less effective in resisting weathering, ozone, and sunlight. When compared to other synthetic rubbers like neoprene, Buna-N provides better oil resistance but is less resistant to weathering and ozone. Silicone rubber, on the other hand, offers excellent temperature resistance and weathering properties but lacks the oil resistance that Buna-N provides. EPDM rubber excels in weather and ozone resistance but is not suitable for oil and fuel applications, where Buna-N would be more durable. In terms of mechanical properties, Buna-N rubber has good tensile strength and abrasion resistance, making it suitable for applications requiring durability under mechanical stress. However, it is not as flexible at low temperatures as some other elastomers, which can limit its use in extremely cold environments. Overall, Buna-N rubber's durability is highly context-dependent, excelling in oil and fuel resistance but less so in weathering and low-temperature flexibility compared to other materials. Its balance of properties makes it a versatile choice for many industrial applications, but the specific environmental conditions and material requirements will ultimately determine its suitability and durability compared to other materials.

Yes, Buna-N rubber, also known as nitrile rubber or NBR, can be used in the oil and gas industry. It is particularly valued for its excellent resistance to oils, fuels, and other chemicals, making it suitable for various applications in this sector. Buna-N rubber is commonly used in the manufacturing of seals, gaskets, hoses, and O-rings that are exposed to petroleum-based oils and fuels. Its ability to maintain flexibility and integrity in a wide temperature range further enhances its suitability for the demanding conditions often encountered in the oil and gas industry. However, it is important to note that while Buna-N rubber is resistant to oil and fuel, it may not perform well in environments with high ozone or weathering exposure, and it can be susceptible to degradation from UV light. Therefore, its use should be carefully considered based on the specific environmental conditions and requirements of the application.

Buna-N rubber, also known as nitrile rubber or NBR, has temperature limits that typically range from -40°C to 120°C (-40°F to 248°F). This range can vary slightly depending on the specific formulation and the presence of any additives or fillers. At the lower end, Buna-N maintains flexibility and resilience, making it suitable for applications in cold environments. At the upper end, it can withstand moderate heat, but prolonged exposure to temperatures above 120°C can lead to degradation, including hardening, cracking, or loss of elasticity.