PREPARATION AND CHARACTERIZATION OF WATER-BASED POLYURETHANE WITH SULFOPHENYL GROUP

Polyol having a molecular weight of 1825 was prepared with the polycondensation of 5-sulfoisophthalic acid monosodium salt, adipic acid and 1,6-hexanediol. A prepolymer was prepared by reacting the obtained polyol with hexanediisocyanate, isophorone diisocyanate, 1,4-butanediol and 2,2-dimethylol-propionic acid. The prepolymer was dispersed under vigorous agitation by adding water and by chain extension with ethylenediamine. Finally the water-based Polyurethane having high molecular weight and high crystallinity was obtained. The obtained polyol and polyurethane were characterized by means of IR spectra, ~1H-NMR spectra, DSC and WAXD.