Casting polyurethane elastomers may be applied to aromatic amines such as MOCA. As a chain extender for widely used TDI-based prepolymers, MOCA adds many advantages to the mechanical properties of prepolymers. However, it is easy to use. Processing, REACH (Registration, Evaluation, Authorization, and Restriction of Chemicals) regulations may impose various constraints in the near future.
Predicting that MOCA may be constrained in the future, the first idea is to replace it with another amine chain extender. However, such replacement often has a rather adverse effect on processing conditions and/or performance.
On the other hand, MDI-based prepolymers can provide an advantageous way out. This system allows for specific performance. However, when using traditional MDI-based prepolymers, manufacturers generally must carefully and accurately observe the process parameters.
Easy to handle in terms of health and safety
In order to provide the best solutions in terms of flexibility, performance, processing, and health and safety, Covestro has made significant advances in MDI-based systems, providing molds for high-performance solutions. These systems combine TDI and MDI. The system's best balance advantage.
For MODI-cured TDI systems, Covestro offers simple machining and mechanical properties that enable them to adapt to a wide variety of applications. On the other hand, like any MDI-based system, they can be tailored to specific performance , And use the same three components to meet the larger hardness range.
These products represent an innovation that provides a simple solution for manufacturers to produce cast polyurethane elastomers with excellent properties.
Desmodur® MTX6076 based system
Desmodur® The MTX6076 system is more than just a simple operating system that can replace the TDI-MOCA system. In fact, this product provides an easy-to-machine solution for the press molding machine. Compared with the traditional TDI-MOCA system, they have better performance. The overall mechanical properties of the machine make it easier to process. The system develops adjustable tank life, low processing temperatures and short demolding times. These features make these systems suitable for manual casting and machine casting of large castings.
Desmodur® MT99xx based system
Due to its performance, especially high dynamic mechanical properties, the Desmodur® MT99xx system has become a reliable alternative to the TDI-MOCA system. In addition, this product is easy to handle and process. With an excellent performance range, they will be well suited for applications requiring high dynamics Applications such as wheels. With its adjustable service life, the Desmodur® MTX6076 system is easy to process. Their low viscosity increases during casting, allowing the system to manually cast and machine large parts.