Modified MDI is a chemically modified MDI product, which is mainly used to improve the performance of MDI and expand its application range. Modified MDI is made of pure MDI, and a liquid mixture containing carbodiimide groups (-N=C=N-) is formed by adding appropriate catalysts and heating reactions. Modified MDI can be divided into carbamate-modified MDI, carbodiimide-modified MDI, diazolidinone-imide-modified MDI, and carbamate- and diazolidinone-imide-modified MDI according to different modification methods.
The main uses of modified MDI include:
Polyurethane products: Modified MDI is widely used in the fields of polyurethane soft foam, rigid foam, semi-rigid foam and elastomers, and can improve the hydrolysis resistance and flame retardancy of products.
Automotive industry: Modified MDI is used to manufacture automobile bumpers, armrests and other parts, and is favored for its good stability and fine pores.
Furniture Industry: Modified MDI is also widely used in furniture manufacturing because of its ease of use and superior performance.
Building Materials: Modified MDI can be used to manufacture polyurethane integral leather molded products with special performance requirements.
Modified MDI is a hazardous chemical, but not a dangerous good. Modified MDI may cause certain harm to human health and the environment during production, storage, transportation and use, so it is necessary to pay attention to safety precautions when using it to avoid direct contact and inhalation.
The specific classification of modified MDI is Class IV hazardous goods, which indicates that it may cause harm to health and the environment under certain specific conditions. In addition, the carbodiimide in modified MDI is irritating and toxic, while MDI itself is irritating and sensitizing, which increases its safety risks when handling. When using modified MDI, relevant safety operating procedures and regulatory requirements must be followed to ensure the safety of operators.