VESTENAMER® for hose extrusion
In many areas of hose extrusion, the use of VESTENAMER® as an additive has become state-of-the-art.
Because compounds that contain VESTENAMER® 8012 have significantly reduced viscosity and improved flowability, the production of hoses such as brake hoses is fully controllable.
Improved flowability at increased temperatures results in improved layer adhesion and increased penetration of the fabric used for reinforcement.
Because of its crystallinity, VESTENAMER® results in a noticeable increase in hardness and green strength of the unvulcanized inner hoses already at ambient temperature—an effect that continues during cooling. In many cases, therefore, the use of an energy-intensive cooling process at sub-zero temperatures to increase hardness and green strength can be significantly reduced or even completely avoided.
Adding small amounts of polyoctenamer improves the homogeneity of rubber compounds—that is, the distribution of fillers and additives. Initially, this causes no appreciable reduction in viscosity but rather a slight increase in some cases. By adding higher amounts, however, the viscosity-lowering effect of VESTENAMER® prevails. The opportunity to reduce the mixing viscosity and therefore increase the flowability of the compound by exchanging some of the basic polymers for TOR plays an important role in making difficult compounds (those with little or no plasticizer content) controllable and improving fabric penetration.