Abstract:Aqueous polyurethanes dispersions of nanometer size derived from various carboxylic polycaprolactonediols of different molecular weights, carboxylic diols, including 2,2-di(hydroxymethyl)propanoic acid (DMPA), 2,2-di(hydroxymethyl)butanoic acid (DMBA), and di(4-isocyanatocyclohexyl)methane (HMDI) were prepared by a method in which the dispersing procedure was modified to enhance the molecular weight. The molecular weight, particle size, and UV-vis spectra of the polyurethane dispersions were investigated. The … Show more
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