Introduction to organic bismuth

Organobismuthcatalyst (DY-20) is a Catalyst for environmentally friendly polyurethane, used in the catalytic synthesis of polyurethane resins, adhesives, coatings, elastomers and other fields. Bismuth belongs to Group 15 in the periodic table of elements. It is the most metallic element in this group and the heaviest stable element in the periodic table of elements.

Advantages:

1. Safe and environmentally friendly, can replace lead, mercury and tin which are being abolished by legislation;

2. It has better hydrolysis resistance stability, reduces the selectivity of reaction with water, and reduces the side reaction between water and NCO group in aqueous PU dispersion;

3. Promote the NCO/OH reaction, avoid NCO side reactions, and reduce the generation of CO2;

4. In a single component In the system, the amines shielded by water are released instead of promoting the reaction between NCO and water;

5. The combination of bismuth and zinc has a synergistic effect, making the formula and Production is more flexible, energy consumption is reduced, and profits are increased;

6. Can be used alone or in combination with amines or other organometallic compounds;

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 organobismuth compounds and the research on organic synthesis, catalysts and biomedicine of organobismuth compounds 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 the European and American markets for many years. These environmentally friendly organobismuth catalysts can be cured at room temperature or under heat, making them an excellent alternative to toxic lead, mercury and tin products.

Types of organic bismuth

Bismuth isooctanoate, bismuth laurate, bismuth neodecanoate , bismuth naphthenate, bismuth oxide, bismuth nitrate, etc. Currently, the three main types used in the market are bismuth isooctanoate, bismuth laurelate, and bismuth neodecanoate.

Application scope

Polyurethane coating, polyurethane leather, polyurethane adhesive, polyurethane rubber, PU resin slurry, etc.