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LANXESS Offers Elastomer Prepolymers for High-performance Rollers and Wheel Treads

Published on 2020-12-22. Author : SpecialChem

LANXESS has developed customized thermoset elastomer prepolymer systems and related hardeners for load-bearing elastomers used in wheel treads and rollers. In addition, LANXESS supports customers with extensive services to optimize components made from these materials.

For example, the prepolymer Adiprene PP1095H was developed for mechanically highly stressed, fast-running high-performance wheels and rollers. "Thanks to a proprietary mathematical model, we are also able to make optimum use of the material advantages of the elastomers with regard to the customer's design specifications and accurately predict the performance of wheel treads and rollers", explains Ian Laskowitz, application development manager at urethane systems business unit.

Hardly Any Heat Build-Up with Periodic Deformation


Adiprene PP1095H is a polyester-based prepolymer terminated with p-phenylene diisocyanate (pPDI). With the hardener Vibracure A250 it produces elastomers with a hardness of 95 Shore A. These maintain their outstanding dynamic properties over a wide temperature range. This is because the dissipation factor tan δ, which describes the conversion of energy into heat under a pulsating load, is lower than for comparable industrial standard materials.

LANXESS-prepolymers

This favorable hysteresis behavior also reduces rolling resistance, which in turn leads to energy savings when, for example, operating forklift vehicles. Because of these characteristics, higher running speeds and higher load capacity can be achieved with these wheels and rollers. Respective vehicles, transport systems or elevators can therefore be operated faster and more efficiently.

Design with High Prediction Accuracy


LANXESS’ proprietary mathematical model for predicting the performance of wheel treads and rollers takes into account the elastomer properties, the geometry of the wheels and rollers and the operational conditions. First, material parameters such as the material dampening properties (tan δ) are determined for the selected elastomer system in a dynamic-mechanical analysis.

The customer's specifications are then taken into account – such as the wheel geometry, duty cycle and operating temperature. The tool then calculates the loads and running speeds at which the material fails due to hysteresis, as well as predicting its other stress related failures such as fatigue and bond failures.

"Our tool offers a very high prediction accuracy across many different industries. We have been able to successfully help numerous customers to optimize their wheel treads and rollers to meet the required demands of the application. This applies not only to Adiprene PP1095H, but also to all of our cast urethane products which LANXESS has developed for this application segment. These include many ester, ether and polycaprolactone-based prepolymer systems produced with a variety of isocyanates," summarizes Laskowitz.


Source: LANXESS
CHINAPLAS 2021
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