Crosslinking is a process that forms a three-dimensional polymer network by chemical reaction into PmB. Hence, storage stability of modified bitumen is highly improved. When only a linear SBS was usable, it becomes possible to use a radial SBS.
Crosslinking also generates a boost in elastic recovery. Thus, for equal elastic recovery, the required quantity of elastomer is significantly reduced, and the overall cost with respect to raw materials (SBS+crosslinker) is lower than that of PmB without crosslinker (exclusively SBS).
Our crosslinkers are using sulphur as crosslinker agent. Granules or liquids, they are designed to control more or less the emission of the sulphur species generated during the crosslinking, in order to ensure the safety of the operators, and to limit the risks during bitumen modification.