History and production method:
A copolymer of styrene and butadiene containing more than 50% butadiene is called SBR. The typical ratio of monomers (monomers) is 70% to 75% butadiene to 25% to 30% styrene, and if the styrene is above 50%, the product becomes highly plastic and is used in the preparation of latex paints (Latex). Becomes.
This polymer is defined as a common polymer with high and high performance and is considered the most widely used rubber in the world, which has a reasonable price due to its cheap and abundant production raw materials, and therefore, the highest production volume. Is also dedicated to the rubber industry. Up to 70% of SBR produced in the tire industry, especially tire tread, 15% is used in mechanical parts and about 10% in the form of latex.
Styrene butadiene rubber was actually developed in Germany before World War II, but was widely used in the United States and Germany during World War II to replace natural rubber captured by East Asia (Japan).
The mechanical properties of SBR are lower than NR and, like it, do not crystallize due to traction and are therefore weak unless reinforced with soot or other materials, in which case it is even weaker than natural rubber.