Comparison of Enviroementally Friendly, Selective Polyurethane Catalysts

摘要

Selected commercially available amines, including N-substituted morpholines, were evaluated as single catalysts and as catalyst mixtures for polyurethane foam preparation. The motivation was the search for economically and environmentally attractive replacements of "classical" catalysts, like diazabicyclooctane, dibutyltindilaurate, and N,N-bis(2-dimethylaminoethyl)methylamine. Especially interesting was replacing dibutyltindilaurate, and also the possibility of using reactive catalyst derivatives that would be incorporated into polyurethanes, thus reducing the content of volatile organic compounds in the polymer. The catalysts were tested on a alpha,omega-polybutadienedioH-toluenediisocyanate-based system. In some experiments, toluenediisocyanate was replaced by the more reactive and environmentally friendly 4,4'-Methylenebis(phenylisocyanate) and polybutadienediol by polypropyleneglycol.