Styrene-butadiene or
styrene-butadiene rubber (SBR) describe families of
synthetic rubbers derived from
styrene and
butadiene (the version developed by
Goodyear is called
Neolite). These materials have good abrasion resistance and good aging stability when protected by additives. In 2012, more than 5.4 million tonnes of SBR were processed worldwide. About 50% of car
tires are made from various types of SBR. The styrene/butadiene ratio influences the properties of the polymer: with high styrene content, the rubbers are harder and less rubbery. SBR is not to be confused with a
thermoplastic elastomer made from the same monomers, styrene-butadiene
block copolymer.