Organobismuth catalyst has low cost, easy handling, low Green safety features such as toxicity and low radioactivity. In the past 10 years, both the synthesis of new organobismuth compounds and the research on organobismuth compounds in organic synthesis, catalysts and biomedicine have been at a leading level. Rapid development stage. 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.
Advantages of choosing organic bismuth:
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. Promotes NCO/OH reaction, avoid NCO side reactions and reduce the generation of CO2;
4. In a one-component system, liberate the amine shielded by water instead of promoting the reaction between NCO and water;
5. Bismuth zinc The combination has a synergistic effect, making the formulation and production more flexible, reducing energy consumption and increasing profits;
6. It can be used alone or in combination with amines or other organometallic compounds;
Although organic bismuth meets the requirements Environmental protection requirements, but due to the inherent deficiencies in the catalytic activity of organobismuth, the production efficiency of some products decreases and the demoulding time is prolonged; ALLCHEM 360 is also an environmentally friendly catalyst that does not contain organotin compounds and also meets environmental protection requirements, but the catalytic rate of ALLCHEM360 Much higher than organic bismuth, less dosage and faster aging. Organic bismuth dries quickly when used in large amounts, but gels slowly. However, it is very sensitive to the acidity and alkalinity of the coating. If it is not properly controlled, there will be problems with the drying of the coating half a month after adding. ALLCHEM 360 solves the above problems. Both of them are Can replace organotin compounds, providing users with more selectivity;
