ULTRASIL® is indispensable in tire manufacture and the production of industrial rubber goods. It is an essential component in the treads of what is known as Green Tires, which are distinguished from conventional tires particularly by low rolling resistance and significantly improved grip (road holding). In industrial rubber goods silica is used, for example, to reduce hysteresis loss in conveyor belts or as an active filler in colored rubber articles or in products with food contact.
The spectacular success of precipitated silica in tire applications would not have been possible without sulfur silanes. Hydrophilic silica does not easily mix with hydrophobic rubber; a sulfur silane must therefore be added to bind them chemically. This was achieved for the first time by means of Evonik’s Silica / Silane technology – and ULTRASIL® VN 3 and Si 69® are the result of this development.
The desire of tire and MRG manufacturers for improved processability of rubber compounds has resulted in a continuous expansion of Evonik’s product range. For example, elastomers and additives can be more easily, and above all more efficiently, mixed through the addition of the special process additive VESTENAMER®. POLYVEST® liquid polybutadienes reduce rolling resistance further; in this case it is even possible to dispense with mineral oil as a plasticizer.
ULTRASIL® - Reinforcing Fillers
From shoe soles through technical rubber products to low rolling resistance tires with excellent wet grip properties and good abrasion resistance, the ULTRASIL® product range offers a wide spectrum of performance characteristics to meet the specific requirements of our customers.
ULTRASIL® - the leading global brand for precipitated silica.
AEROSIL® – Fumed Silica for high-end applications
AEROSIL® is used as reinforcing filler in silicone rubber and in highly demanding technical rubber goods. It boosts high temperature utilization and operation in challenging environments, e.g. solvents or water. It improves tear strength and abrasion resistance and enables ultra clean and transparent products because of its high purity.
Rubber Silanes - Enabler for high-performance applications
Rubber Silanes from Evonik are used in a wide range of products in the rubber industry from mechanical rubber goods through shoe soles to tires with excellent rolling resistance, thus reducing fuel consumption. In combination with silica our products such as Si 69® and Si 363® enable cutting-edge technologies to meet tomorrow’s challenges.
VESTENAMER® - The world’s most versatile rubber additive
VESTENAMER® solves challenges regarding compatibility, mixing, shaping and product performance. The value of this unique rubber additive is proven for multiple rubber types in tire, technical rubber goods and rubber recycling. Discover how VESTENAMER® improves your products and processes.
POLYVEST® - Liquid rubber for enhanced tire performance
Evonik offers POLYVEST®, a range of butadiene based liquid rubber, for application in tires and mechanical rubber goods. POLYVEST® liquid rubber enhance processing, reduce rolling resistance, improve snow and ice traction and the wet grip of tires.