Silica–silane systems currently dominate low-rolling-resistance tire technology, while carbon black-filled compounds have traditionally been limited by challenges in controlling filler-filler interactions. In this work, a patented peroxide-based compounding concept for natural rubber (NR)/carbon black formulations is presented, specifically targeting reduction of the Payne effect and hysteresis to reduce rolling resistance. By reactive compounding small amounts (<1 wt%) of selected organic peroxides in combination with stabilizers during the masterbatch mixing stage, significant modification of the rubber-filler interface is achieved. This work represents the first public disclosure of a peroxide-engineered compounding strategy by Nouryon. Co-author Leo Nijhof

• Serious reduction of Payne effect of (NR)/carbon black compounds after reactive compounding with organic peroxides
• The resulting compounds show markedly improved carbon black dispersion, a reduction in filler network, and enhanced rubber-filler interaction
• Dynamic mechanical analysis demonstrates a significant reduction in tan δ at 70°C, indicating substantial hysteresis reduction and strong potential for rolling resistance improvement
• The concept offers a practical and scalable pathway toward next-generation low-rolling-resistance tires