Styrene Butadiene Rubber Buna S

This type of rubber, once called GR-S, is one of the most important synthetic rubbers. It is a copolymer of styrene and butadiene.Treatments are as follows  

A number of primers can be used, such as Chemlok primers AP-134, and AP-131 (LORD Corporation), or a chlorosilane supplied by GE Sealants, Rohm Haas (www.rohmhaas.com) or Dow Coming Corp. Methanol can be used as a degreasing agent prior to priming. 

This mbber approximates the chemical composition of NR. Its predominant stmcture is cis-l,4-pol-yisoprene, the same as that of NR. In general, the synthetic polyisoprenes are lower in modulus (more flexible) and higher in elongation than the NR. Synthetic polyisoprene was first introduced 

Recommended primers include butadiene—styrene adhesive in aliphatic solvent and Chemlok 205 adhesive (LORD Corporation) in methyl isobutyl ketone diluent. 

This method has been used with some success with Buna S rubber best results were obtained using helium, air, and nitrogen plasmas. 

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