3419 Smallman Street, Pittsburgh, PA 15201 412-682-5882 www.presschem.com Styrene Butadiene Anionic Copolymerizaon Pressure Chemical Co. (PCC) has experience in styrene butadiene anionic copolymerizaon process development and scale-up. These processes can be challenging due to regulatory requirements and the extreme reacon condions, as well as the need to use toxic, flammable, carcinogenic, and reacve raw materials and reagents. Our sciensts, engineers, and operators are well-versed in the safe operaon of the purificaon systems and oſten high-pressure equipment necessary for these syntheses. Styrene and butadiene can be polymerized in a solvent using organo lithium reagents and a modifier as iniators. This anionic polymerizaon is performed under scrupulous exclusion of moisture and air. The resulng polymer product can be quenched and precipitated or the solvent can be stripped off (customer process dependent). The polymer can then be analyzed by NMR and GPC. Other analyses may also be performed. PCC can readily execute your batch styrene butadiene anionic copolymerizaon reacons covered under a confidenality agreement. A general example of a polymerizaon performed at PCC follows. Init H y x + Initiator modif ier PCC is experienced with styrene butadiene anionic copolymerizaon reacons requiring block co- polymer work to impact the properes and performance of the polymer. We can help you with your process requirements at lab and pilot scale. Styrene butadiene anionic copolymerizaon processes can be followed by a hydrogenaon step which can simply reduce the vinyl groups or produce fully saturated copolymers. PCC has the flexibility to help you with the approach that is best for your requirement. Contact us today to discuss your project with one of our sciensts. Please ask about our extensive hydrogenaon experience and other capabilies as well. A Pressure Chemical Co. Competency