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Synthesis of polyurethanes through the oxidative decarboxylation of oxamic acids: a new gateway toward self-blown
Quentin Jaussaud1, Ikechukwu Martin Ogbu2, Govind Goroba Pawar2
1University of Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629 16 Avenue Pey-Berland F-33600 Pessac France cramail@enscbp.fr.
Abstract:
Polyurethane (PU) thermoplastics and thermosets were prepared through the step-growth polymerization of in situ generated polyisocyanates through the decarboxylation of polyoxamic acids, in the presence of phenyliodine diacetate (PIDA), and polyols. The CO2 produced during the reaction allowed the access to self-blown polyurethane foams through an endogenous chemical blowing. The acetic acid released from ligand exchange at the iodine center was also shown to accelerate the polymerization reaction, avoiding the recourse to an additional catalyst. Changing simple parameters during the production process allowed us to access flexible PU foams with a wide range of properties.
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