The most widely synthetic rubber in the entire world is SBR, a copolymer of styrene and butadiene. The most part of SBR rubber is used in tire by blending with natural rubber and butadiene rubber. SBR is weak and unusable without reinforcement by carbon black, but with carbon black it is strong and abrasion–resistant. The defects of SBR are poor resistant to oil and not suitable in weathering, UV, oxygen, ozone because the double bond in the polymer backbone.
The service temperature of SBR can be designed from -55°C to 100°C.
50 to 70 Shore A are available