Posted on September 24, 2025In NR, Rubber, Technical Bulletin VIEW TECHNICAL BULLETIN RUBBER TYPE: NR APPLICATIONS: Motor Mounts FORMULATIONS: Replacing N774 with N990 in NR compounds THERMAX® EFFECTSImprovement in dispersionIncrease in scorch safetyMaintenance of physical propertiesImprovements in compression set and resilienceDecrease in dynamic stiffness and dynamic to static stiffness ratioPotential cost reductions due to higher total filler loading DATA COLLECTEDMooney ViscosityMDRRPAShore A HardnessTensileCompression SetReboundStatic StiffnessDMA Automotive Engine Mount Motor Mount Mount Natural Rubber NR NVH