Highly dispersible silica

Reifen Grafik
The increasing demands on high specification tires requires novel tread compounds, which grant low rolling resistance, good winter performance, long service life and excellent handling properties on wet and dry surfaces.
HD Silica developed by Evonik meet these requirements in combination with a bifunctional Silane as coupling agent. Especially with regard to highly efficient mixing cycles and in particular in order to achieve a very good abrasion resistance level, today HD Silica is essential.
ULTRASIL® 5000 GR*

Precipitated silica for use as a reinforcement filler in the rubber industry.
Due to the low specific BET surface area of approximately 115 m2/g the highly dispersible ULTRASIL® 5000 GR combines excellent hysteresis performance and high reinforcement with improved processing behavior in passenger car tire tread compounds. This silica is especially suited to high filler loadings for the optimization of wet and winter properties. ULTRASIL®  5000 GR is only being produced in Asia.
ULTRASIL® 7000 GR

Precipitated silica for use as a reinforcement filler in the rubber industry.
ULTRASIL® 7000 GR is a highly reinforcing silica which was especially developed for application in low rolling resistant passenger car tire tread compounds, so called “Green Tire”. With a specific BET surface area of approximately 170 m2/g this silica imparts to tread compounds in combination with bifunctional silanes high abrasion resistance combined with excellent rolling resistance and wet traction.
 
* Regional availability limited