AN IMPROVED PROCESS FOR THE PRODUCTION OF CARBON BLACK

摘要

A process for producing surface modified carbon black is disclosed. The process comprises the step of treating carbon black with a sulfur compound in an amount in the range of 0.005% -1 % of the carbon black to effect in-situ formation of surface groups to produce the surface modified carbon black which when combined with a polymer composition alters the carbon black-polymer interaction to decrease the hysteresis of the polymer composition. Further, the curing time required for polymer composition comprising the surface modified carbon black is less as compared to the curing time required for polymer composition comprising the unmodified carbon black. Figure 1 shows the curing curve A for polymer composition comprising the unmodified carbon black and curing curve B for polymer composition comprising the surface modified carbon black.