Preparation and characterization of alkoxysilane functionalized isocyanurates

Alkoxysilane functionalized isocyanurates were prepared from hexamethylene diisocyanate (HDI) isocyanurate and 3-aminopropyltriethoxysilane. The react ants and functionalized isocyanurate were characterized by H-1, C-13 and Si -29 NMR, IR and electrospray ionization-mass spectrometry. Two-dimensional NMR was necessary to accurately assign the proton and carbon spectra for bo th the reactants and functionalized products. The composition of the HDI is ocyanurate was a mixture of oligomers ranging from two to three HDI monomer s. The functionalization reaction was performed neat, and as a function of dilution. As expected, substitution on the isocyanurate becomes more unifor m with increasing solvent content. (C) 1999 Elsevier Science Ltd. All right s reserved.