Hello, I'm a specialist in materials science and engineering, with a focus on polymers and their applications. I'm here to provide you with accurate and detailed information regarding the temperature rating of Buna materials.

Buna, also known as Butyl rubber, is a family of synthetic rubbers that are known for their excellent resistance to heat, aging, and various chemicals. The term "Buna" is derived from the German word "Butadien," which is butadiene, a key component in the production of this type of rubber. Butyl rubbers are commonly used in a wide range of applications due to their unique properties, such as tire manufacturing, seals, gaskets, and other industrial components where resistance to heat and chemicals is required.

When discussing the temperature rating of Buna rubber, it's important to note that there are different grades and formulations of Buna, each with its own specific temperature range. The most common type of Buna rubber is Buna-N, which is a copolymer of butadiene and acrylonitrile. This type of rubber is known for its excellent resistance to petroleum derivatives, natural or slightly acidic salt solutions, alcohols, ethers, glycols, fats, oils, and greases.

Buna-N is generally recommended for use in environments where the temperature ranges from -40°F to +250°F (approximately -40°C to +121°C). It's worth mentioning that these temperature limits are not absolute and can vary depending on the specific formulation of the rubber, the presence of additives, and the duration of exposure to these temperatures. For instance, while Buna-N can withstand short-term exposure to temperatures up to +250°F, prolonged exposure to such high temperatures can lead to degradation of the material over time.

It's also important to consider that the temperature rating of Buna rubber can be affected by factors such as the presence of oxygen, ozone, and other environmental factors. These factors can accelerate the aging process and reduce the service life of the rubber. Therefore, when designing a product or system that will use Buna rubber, it's crucial to take into account the specific conditions it will be exposed to and choose the appropriate grade of rubber that can withstand those conditions.

In addition to its excellent heat and chemical resistance, Buna-N also offers good electrical insulation properties, which makes it suitable for use in electrical applications. It has good abrasion resistance and can maintain its properties even under high mechanical stress. However, it's worth noting that Buna-N has lower tensile strength and elongation at break compared to some other types of rubbers.

When selecting Buna rubber for a specific application, it's important to consider the balance of properties that the rubber needs to have. For example, if the application requires high tensile strength, a different type of rubber or a blend of rubbers may be more appropriate. Similarly, if the application involves exposure to specific chemicals or extreme temperatures, a rubber with enhanced resistance to those conditions should be chosen.

In conclusion, Buna-N is a versatile and widely used type of rubber that is rated for a temperature range of -40°F to +250°F. However, it's essential to consider the specific application requirements and environmental conditions to ensure that the rubber will perform as expected and last for the desired service life.

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Buna-N is standard. It is generally recommended for petroleum derivatives, natural or slightly acidic salt solutions, alcohols, ethers,glycols, fats, oils, and greases. This compound should give good serviceFrom -40-- to +250-- F.read more >>