The selection of the right chain extender is a cornerstone of successful polyurethane elastomer formulation. Among the most effective and widely used are aromatic diamines, with Dimethylthiotoluenediamine (DMTDA) and Diethyltoluenediamine (DETDA) being prominent examples. Both offer excellent performance characteristics, but subtle differences in their reactivity and physical properties make one potentially more suitable than the other for specific applications. At NINGBO INNO PHARMCHEM CO.,LTD., we help manufacturers navigate these choices.

DETDA, often recognized for its rapid reaction rate, is a popular choice for applications requiring fast curing cycles. It works exceptionally well with isocyanate prepolymers, contributing to a high degree of hardness and strength in the final elastomer. When you are looking to buy DETDA for casting PU, you are opting for an established agent that provides good processing characteristics, especially in hot casting applications.

On the other hand, DMTDA offers a slower reaction rate compared to DETDA. This can be a significant advantage for applications where longer pot life or easier processing is required, such as in certain casting elastomer systems. The source material states DMTDA has a lower chain reaction rate than DETDA and has a viscosity at 20°C of 700 mPa·s, indicating good handleability. Its processing performance and elastomeric properties can be comparable to MOCA. If you need to source a liquid aromatic diamine, DMTDA presents a compelling option for those seeking controlled reactivity and excellent end-product properties.

Both DMTDA and DETDA are valuable chain extenders, and the choice often comes down to processing convenience and specific performance requirements. For manufacturers seeking to purchase aromatic diamine chain extenders, understanding these differences is key to optimizing their polyurethane formulations. Our company is a leading supplier of liquid aromatic diamines and other critical chemical intermediates in China.

As a premier manufacturer of chain extenders, NINGBO INNO PHARMCHEM CO.,LTD. provides both DMTDA and DETDA. We encourage you to buy DMTDA for polyurethane applications or DETDA for your casting systems. Our commitment is to provide high-quality materials that meet your exact specifications. If you're looking for a reliable supplier for chain extenders in China, look no further. Contact us today for a quote and to discuss how our products can benefit your manufacturing processes.