Synthesis of a New Mannich Polyether Polyol with Isocyanuric Structure

摘要

The paper presents the synthesis and characterisation of a new Mannich polyether polyol with high nitrogen content and thermostable isocyanuric structure.The synthesis was performed by the alkoxylation in the absence of any catalyst of a Mannich base obtained by the reaction of cyanuric acid with a Mannich precursor reagent 1,3-oxazolidine.The Mannich polyol was characterised by 1H NMR and 13C NMR,infrared spectroscopy and by the determination of some usual characteristics such as hydroxyl number,viscosity,amine echivalent,water content.The main application of this polyol is the production of "spray" rigid polyurethane foams with higher thermostability and inherent flame retardancy properties.