| Solution polymerized styrene-butadiene rubber is obtained by the anionic polymerization of styrene and butadiene initiated by lithium alkyls in hydrocarbon solvent, the distribution of styrene units in the polymer chain results in either block or random co-polymers. Block S-SBRs have a lower styrene content than Random S-SBRs and are more suitable for calendaring and extrusion processes. They are also used for bitumen modification and for the production of adhesive and high impact polystyrene and ABS resins. Random S-SBRs provide a versatile support for tailor made product operation through the styrene content and microstructure of butadiene units allowing good performance in terms of process ability, rolling resistance, grip and abrasion and becoming the first preference in the tire sector. Applications: Silica based compound for tire tread with improved wet grip. Information provided by Versalis. |
