A33 is a 33% triethylenediamine solution that is mainly used as a gel catalyst for polyurethane foam. It is widely used in soft, semi-rigid, and rigid polyurethane foams, elastomers, coatings, etc. In industrial applications, triethylenediamine is usually melted in small molecular diols and configured into an alcohol solution with a mass fraction of 33% (or other concentrations). Commonly used diols include dipropylene glycol, propylene glycol, diethylene glycol (diethylene glycol), ethylene glycol, etc.
As a catalyst, triethylenediamine regulates the reaction rate by promoting the reaction of isocyanate with water (foaming reaction) and the reaction of hydroxyl with isocyanate (gel reaction), thereby ensuring the stability and performance of polyurethane foam. Its chemical mechanism of action is that it can accelerate these reactions, thereby controlling the formation and curing process of foam.
Triethylenediamine is mainly used as a catalyst in polyurethane foaming. Its most important role is to regulate the speed of foaming reaction and gel reaction so that they are in a good balance. It is one of the most important tertiary amine catalysts in soft foam production, with 60% of its efficacy used to promote the reaction between isocyanate and water, i.e., the foaming reaction, and 40% used to promote the reaction between hydroxyl and isocyanate, i.e., the gelling reaction.