MDI elastomers are designed as two-component or three-component. While these components can be MDI-based prepolymer and short chain polyol components, sometimes they can be mixtures of prepolymer, short chain polyol and long chain polyol.

1,4-butanediol is short-chain polyols in elastomers. In addition, HQEE, 1,3-propanediol and other similar materials are also used.

Raw material selection and appropriate hardness are determined according to the desired performance for the application area. For this, a prepolymer and polyol mixtures with the appropriate polyol system are determined. Appropriate mixing systems are designed with short chain polyols.

As with TDI systems, these applications are usually carried out at high temperatures. The most important difference is that TDI prepolymers and the amine derivatives used are more harmful than MDI systems.

We can summarize the differences between TDI and MDI elastomers as follows;