Organobismuth is an environmentally friendly PU catalyst, which is mainly used to replace organotin (with the amount of organotin added and the same drying speed) to meet the export standards of the European Union. Now many PU products are exported The reason for being returned to the EU is that there is no way to pass the EU inspection.
Bismuth belongs to group 15 in the periodic table, is the most metallic element in this group, and is the heaviest stable element in the periodic table. Bismuth compounds have green and safe properties such as low cost, easy handling, low toxicity and low radioactivity. In the past 10 years, both the synthesis of new organic bismuth compounds and the research on organic bismuth compounds in organic synthesis, catalysts and biomedicine have been in a stage of rapid development. Organic bismuth products produced in advanced foreign countries have a history of more than 30 years and have been supplied to European and American markets for many years. These environmentally friendly organic bismuth catalysts can be cured at room temperature or heated, and are an excellent choice to replace toxic lead-mercury-tin products, and have been widely used at home and abroad.
Better selectivity for NCO/OH groups, better mechanical properties of the finished product; short induction time, gradually increasing viscosity.
1. The combination of bismuth and zinc has a synergistic effect, which makes the formulation and production more flexible, reduces energy consumption, and improves profits;
2. In a one-component system, the water The shielded amine is liberated instead of promoting the reaction of NCO and water;
3. Promote the NCO/OH reaction, avoid NCO side reactions, and reduce the generation of CO2;
4. Can be used alone Use
5. Safe and environmentally friendly, can replace lead and mercury and tin that is being abolished by legislation;
6. Have better hydrolysis stability and reduce the selectivity of reaction with water , In water-based PU dispersions, reduce side reactions between water and NCO groups;
Types of organic bismuth
Bismuth neodecanoate, bismuth isooctanoate, bismuth dilaurate, cyclo Bismuth alkanoate, bismuth oxide, bismuth nitrate, etc.
At present, bismuth neodecanoate is mainly used in the market, and its application range is polyurethane coating, polyurethane leather, polyurethane adhesive, polyurethane rubber, PU resin slurry, etc.
Tag:    Neodecyl  bismuth octadecanoate
