Styrene Butadiene Rubber (SBR) is a copolymer of butadiene and styrene. The performance is close to natural rubber, and it is currently the largest output of general-purpose synthetic rubber. It is characterized by abrasion resistance, aging resistance and heat resistance exceeding natural rubber, and its texture is more uniform than natural rubber. The disadvantages are: low elasticity, poor flex resistance and tear resistance; poor processing performance, especially poor self-adhesiveness and low green rubber strength. Operating temperature range: about -50℃~＋100℃. It is mainly used to replace natural rubber to make tires, rubber sheets, hoses, rubber shoes and other general products.