China’s modified MDI industry market status and analysis of major companies in 2022

Modified MDI is also called liquefied MDI. It uses pure MDI as raw material, selects an appropriate catalyst (such as cyclic phosphine oxide compound), and after heating together, MDI self-polymerizes and releases carbon dioxide, forming part of the carbodiimide group (-N =C=N-) liquid mixture. Due to different modification methods, it can be mainly divided into carbamate-modified MDI, carbodiimide-modified MDI, diazepinone-imine-modified MDI, and carbamate- and diazepine-modified MDI. Ketimine modified MDI. Since pure MDI is solid at room temperature, it is inconvenient to use, and 4,4-MDI has poor stability during storage. Pure MDI needs to be heated and melted into a liquid before use, and repeated heating affects the quality of MDI. Therefore, modified MDI is generally used. .

The “2021-2025 China Modified MDI Industry Market Monitoring and Future Development Prospects Research Report compiled and released by the Industrial Research Center shows that , modified MDI is easier to use than pure MDI, and is mainly used in the manufacture of high-performance microporous polyurethane elastomers, molded soft polyurethane, and white-crusted foam plastics, including: shoe soles, solid tires, car bumpers, and fenders. , shock absorbers, spoilers, steering wheels, headrests, armrests, interior trim parts, etc. It is also widely used in the manufacture of adhesives, coatings, fabric coating finishing agents, etc. Modified MDI has great development potential in fields such as automotive interiors due to its low odor. Modified MDI has a high proportion of molded foam and is mainly used in the production of car seats, toys, etc.; it is also widely used in the field of shoe soles.

In terms of suppliers, BASF and Covestro have dominated the field of modified MDI for a long time. With the release of production capacity of domestic companies and the catching up of some import companies, the current domestic modified MDI manufacturers mainly include Yantai Wanhua Polyurethane Co., Ltd., DOW Chemical Company, Mitsui Chemicals Co., Ltd., Japan Polyurethane Industry Co., Ltd., Bayer Company of Germany, Huntsman Company of the United States, etc. The modified MDI produced by Yantai Wanhua is carbodiimide-uretonimine modified MDI, which can be used in fields such as microporous polyurethane soles, whole-leather foam and coatings. The modified MDI produced by DOW Chemical Company is carbodiimide modified MDI. Some of the modified MDI of Japan’s Mitsui Chemicals Co., Ltd. is carbodiimide-modified MDI, which is mainly used in the production of polyurethane elastomers, reaction injection molding, soles, coatings, synthetic leather, high-elastic foam and other products. The modified MDI products of Japan Polyurethane Industry Co., Ltd. include polyol-modified and carbodiimide-modified products, which are mainly used in the fields of whole-skin foam, automotive dashboards, RIM, elastomers and other fields. The modified MDI produced by Bayer in Germany is mainly used in CASE materials, foam plastics, two-component and moisture-curing one-component polyurethane adhesives. As the production capacity of modified MDI products of domestic enterprises such as Wanhua Chemical and Shandong Dongda Yinuowei increases, domestic enterprises occupy a certain market position in the field of modified MDI.