SBR is produced by the copolymerisation of butadiene with styrene in the approximate proportion of 3:1 by weight.
In the emulsion process, producing general purpose grades, the feedstocks are suspended in a large proportion of water in the presence of an initiator or a catalyst and a stabiliser. A continuous process is employed.
In the solution process, the copolymerisation proceeds in a hydrocarbon solution in the presence of an organometallic complex. This can be either a continuous or batch process. Some manufacturing facilities have swing capacity with PBR.
Process modifications can produce higher performance polymers. Companies, such as Asahi Chemical, are pursuing the development of premium products by such means.
Styrene-butadiene rubber
Price Reports
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Styrene-butadiene rubber
Uses and Outlook
Styrene butadiene rubber (SBR) is the largest volume synthetic rubber. With over 70% being consumed in the manufacture of tyres and tyre products, demand is very much dependent on this sector.
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