At the Tire Technology Expo 2017 in Hanover, Evonik presents VESTENAMER - a process additive with unique properties for efficient tire production.
VESTENAMER not only simplifies the mixing and manufacturing of various tire compounds. The process additive also improves the dispersion of difficult polymer blends and reduces the viscosity of the compound while the positive dynamic properties of the vulcanizate generally remain unaffected or in some cases even further increased.
Improved processability of rubber compounds
Modern high-performance tires require low rolling resistance and excellent wet grip, in combination with a high abrasion resistance. This can only be achieved with highly active fillers such as carbon black and especially with precipitated silicas. Particularly mixtures with high concentrations of fillers require multi-stage mixing processes in order to achieve a good dispersion. VESTENAMER can significantly shorten the mixing cycles as a dispersing aid and at the same time optimize the batch consistency during production. As a result, the mixing stages in the process can be reduced and the process can be designed more efficiently.
High hardness, exceptional abrasion resistance and very low compression set are the important requirements for compounds for rim bands. VESTENAMER increases the processability of the rubber compound since the viscosity is reduced at the mixing temperature, thus preventing bagging on the rolling mill.
Thanks to its crystallinity and the high recrystallization rate below the melting range, VESTENAMER leads to excellent dimensional stability in extrusion processes. By reducing the internal friction, the addition of VESTENAMER can significantly reduce the reversion of natural rubber. When mixing differently polarized, incompatible elastomers, Evonik's process additive can greatly improve compatibility.
Processing additive with unique features
VESTENAMER is a semi-crystalline additive - also known as Trans-Octenamer Rubber (TOR). As a polymeric processing aid, it is a softening agent in rubber mixtures during mixing and processing processes. However, during the vulcanization of the rubber part, it is crosslinked and incorporated as an elastomer completely into the polymer network. Thus, the excellent properties of the mixture remain stable in the final application.
Find out more about VESTENAMER for efficient tire production at our booth C816 at the Tire Technology Expo from 14 to 16 February in Hanover.
For more information, visit www.vestenamer.de