BR Rubber - Butadiene Rubber - Properties

BR Gum is Butadiene rubber, also known as polybutadiene. It is built from its basic units. Butadiene monomers are linked in it by many bonds - both 1,4 and 1,2 type. Usually, Butadiene rubber BR is used in combination with other types of rubber, e.g. natural, styrene-butadiene, chloroprene, or acrylonitrile-butadiene. It is rarely used in its pure form. When combined with other rubbers, it is most commonly used to increase flexibility at low temperatures. At the same time, its wear resistance is also increased.

What does the abbreviation BR mean?

This abbreviation comes from the English language. The abbreviation BR stands for Butadiene rubber.

Its abrasion resistance sets it apart from all types of rubber. It also shows resistance to swelling in acids, alkalis, alcohol, and water. Its operating temperature range is from -60 to +100 degrees Celsius.

Butadiene rubber is characterized by good resistance to alcohols, glycols, acids, and esters. In low temperatures, it exhibits exceptionally high elasticity, especially in vulcanized products. It has a low hysteresis level, meaning a delay in response to a factor. However, it is not resistant to flames, oils, and fats. It is also subject to aging and thermal factors. It absorbs water only to a small extent.

The density of raw BR rubber is 0.91g/cm3. When used as a plasticizer, with the addition of oil, its density may change. In that case, it is around 0.92g/cm3. However, the density can vary depending on the composition of the mixture.

Buna CB, Europrene - CIS, and Calflex BR are trade names under which we encounter butadiene rubber.

Butadiene rubber is mainly used in the tire industry. It is used to create drive belts and conveyor belts. It is also used to produce tire treads, tapes, and V-belts. However, it does not work well as a sealant. It is also used as a vibration damper and in the footwear industry. With it, tires, inner tubes, and bumpers are also produced.