tetramethyl dipropylenetriamine (tmbpa) in flame-retardant polyurethane foam formulations abstract: tetramethyl dipropylenetriamine (tmbpa) is an important tertiary amine catalyst widely used in the production of polyurethane (pu) foams. this article provides a comprehensive overview of tmbpa, focusing on its application in flame-retardant pu foam formulations. the discussion encompasses its chemical properties, mechanism of action in pu...