enhancing foam uniformity with tetramethylimidazolidinediylpropylamine (tmbpa) in high-pressure molding 💡 introduction tetramethylimidazolidinediylpropylamine (tmbpa), a tertiary amine catalyst, plays a crucial role in the high-pressure molding of polyurethane (pu) foams. its unique chemical structure and catalytic activity make it particularly effective in promoting both the gelling (polyol-isocyanate reaction) and blowing (water-isocyanate reaction) reactions, leading to improved...