Synthesis of fatty acid-based Non-Isocyanate Polyurethanes, NIPUs, in bulk and mini-emulsion

Abstract : The synthesis of fatty acid-based poly(hydroxy urethane)s, PHUs, was investigated. Bulk polymerization of fatty acid-based bis-carbonates with fatty acid diamine, Priamine® 1075, was first studied, allowing us to prepare non-isocyanate polyurethanes, NIPUs, at low temperature (60 °C) and in few hours. Water-borne NIPUs latexes were then prepared with the same monomers through mini-emulsion process. Different surfactants and hydrophobic additives were tested in order to obtain stable emulsions and polymer particles. NIPUs latexes with solid content up to 30 wt.% could be achieved. As a general trend, NIPUs prepared in mini-emulsion exhibited lower molar masses than the ones formed in bulk, phenomenon explained by the partial hydrolysis of cyclic carbonates.
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https://hal.archives-ouvertes.fr/hal-01373137
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Submitted on : Wednesday, September 28, 2016 - 11:07:18 AM
Last modification on : Thursday, January 11, 2018 - 6:28:10 AM

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Estelle Rix, Etienne Grau, Guillaume Chollet, Henri Cramail. Synthesis of fatty acid-based Non-Isocyanate Polyurethanes, NIPUs, in bulk and mini-emulsion. European Polymer Journal, Elsevier, 2016, 84, pp.863-872. ⟨10.1016/j.eurpolymj.2016.07.006⟩. ⟨hal-01373137⟩

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