Understanding the difference between TDI and MDI

Understanding the difference between TDI and MDI in Polyurethane Elastomers – As a professional in the polyurethane industry, it’s important to understand the difference between TDI and MDI in polyurethane elastomers. Both are used as isocyanates in the production of high-quality polyurethane elastomers, as they have good mechanical properties, chemical resistance, and durability. However, there are some key differences between the two.

TDI (toluene diisocyanate) is an aromatic isocyanate that is often used in the production of cast polyurethane elastomers. It has a higher reactivity and faster cure time than MDI, which makes it more suitable for applications that require quick turnaround times. TDI is less sensitive to moisture, however, is more toxic and can cause respiratory and skin sensitisation.

MDI (diphenylmethane diisocyanate) comes in both aromatic and aliphatic isocyanates that are often used in the production of polyurethane elastomers for applications that require high strength, toughness, chemical and abrasion resistance. MDI can have  slower cure times than TDI, which makes it more suitable for applications that require longer open times. MDI is also less toxic than TDI, which makes it a safer option for workers.   Aliphatic systems have high resistance to weathering, high chemical resistance and durability in aggressive environments.

When selecting the right polyurethane elastomer for a specific application, it’s important to consider the properties of both TDI and MDI. At U Resin Industrial, we work closely with our customers to understand their specific needs and provide them with the best possible solution. Our team of experts is always available to answer questions and provide technical support, and we are committed to helping our customers succeed.

At U RESIN Industrial, we offer a range of high-quality polyurethane elastomers that are used in a variety of applications, from conveyor belts and rollers to mining equipment and automotive components. Our team of experts understands the importance of using the right type of isocyanate for each application, and we are committed to providing our customers with the best possible products and services. Whether you need a fast-curing solution for a time-sensitive application or a more durable option for a harsh environment, we have the expertise and experience to help you find the right solution.