Evonik Industries AG recently announced Ultrasil 4000 GR, a silica with high dispersibility and low specific surface area to allow for an extremely high silica fill ratio in tire treads. Compared to using conventional silica, Ultrasil 4000 GR vastly improves traction for winter tires on snowy and slushy roads. Ultrasil’s grades also have uses beyond tire treads and sidewalls, including...
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