Organozinc catalyst is a moderately activepolyurethane catalyst It can be used as a main catalyst or cocatalyst in MDI systems and other isocyanate systems. This product has low reaction to water and isocyanate, and the finished product has fewer bubbles. It is used in coatings, adhesives, and elastomer systems to promote cross-linking and shorten curing time.
Organozinccatalysts are much less toxic than catalysts such as lead isooctanoate and organic mercury, and can partially replace the above catalysts. This product has low catalytic activity, so it is recommended to be used in conjunction with organobismuth catalyst DY-20, etc.
Product performance
1. Compared with bismuth and zinc catalysts, the reaction speed Slow;
2. A very effective cross-linking catalyst, and the surface of the final product is not sticky.
3. Use bismuth-zinc composite catalyst to replace mercury catalyst, organic tin, etc., add zinc to strengthen and solidify to adjust the gel properties or to achieve certain In response to the requirements of some customers to replace mercury catalysts, we have developed a bimetallic bismuth-zinc composite catalyst. In this kind of catalyst, bismuth provides the gel speed required for curing and generates polyurethane with high selectivity and high rate. Zinc, as a slower gel and better cross-linking catalyst, can reduce the acidity of the system and accelerate the reaction to promote cross-linking. Union.
Users can adjust the gel properties by changing the concentrations of these two metals in the system. For example, by adding KRZN1 (19% zinc) or KRZN2 (23% zinc) to increase the zinc in the system, extend the operating time in the kettle during the induction period, and promote post-curing. Due to the different reaction systems of users, the optimal bismuth zinc is also different. Keep the amount of bismuth unchanged, conduct experiments by adding different amounts of zinc, control the bismuth-zinc ratio between 1:1-1:10, and find the bismuth-zinc ratio that best suits your system.
Organic zincEnvironmentally friendly Characteristics of the catalyst: light color, moderate activity, can be used in aliphatic polyurethane coatings and elastomer systems to shorten curing time. Organozinc catalyst can be used in conjunction with organobismuth catalyst (DY-20).
