Sinochem News In December, China Ordnance Industry Group Beihua Group Gansu Yinguang Chemical Industry Group Co., Ltd. synthesized m-xylylene dimethyl isocyanate (M-XDI) with a purity of 99.58%, reaching the international purity of 99.5 % qualified product standards, which marks a breakthrough in the company’s isocyanate small-scale synthesis research project.
M-XDI is a polyurethane raw material. Its products have properties such as light stability and yellowing resistance. It is mainly used in the field of high-end polyurethane spectacle lenses. It is also used in products such as XDI-TMP and XDI trimer curing agents. The form is used in high-end polyurethane coatings, flexible packaging, outdoor sealants, elastomers, leather and adhesives and other fields. At present, the world’s major manufacturer is Japan’s Mitsui Chemicals, and domestic downstream manufacturers completely rely on imports to meet their production needs. As the first company in my country to introduce complete sets of process equipment and successfully produce TDI products, Yinguang Group has long been accelerating the ability to transform my country’s TDI scientific and technological achievements into production, promoting independent development in major TDI scientific and technological fields, and extending the polyurethane industry chain.
The m-xylylene dimethyl isocyanate small-scale synthesis research project was established in January 2016. The project conducts synthetic research on M-XDI through small-scale experiments, explores the small-scale test process and distillation conditions, and optimizes the reaction. Operating conditions and process parameters, thereby obtaining a small-scale synthesis process and qualified M-XDI. Since the establishment of the project, members of the project team have continuously optimized reaction conditions and distillation conditions to achieve a product purity of more than 99%. In order to achieve the standard of 99.5% qualified products, members of the project team held repeated meetings and discussions to analyze possible influencing factors. Based on the analysis of previous test data and phenomena, they continuously optimized the synthesis process conditions and distillation conditions, and finally obtained the qualified product. product.
The successful research and development of Yinguang Group’s m-xylylene dimethyl isocyanate has broken the technical monopoly of foreign M-XDI production companies on M-XDI production and laid the foundation for the next step of M-XDI kilogram-level research and subsequent pilot design. Development provides a theoretical basis. While enriching the company’s small isocyanate product varieties, it has further improved the company’s small isocyanate product research and development capabilities and the company’s independent innovation capabilities.
