Synthesis of polyurethanes through the oxidative decarboxylation of oxamic acids: a new gateway toward self-blown foams,Chemical Science

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Synthesis of polyurethanes through the oxidative decarboxylation of oxamic acids: a new gateway toward self-blown foams
Chemical Science ( IF 7.6 ) Pub Date : 2024-07-25 , DOI: 10.1039/d4sc02562h
Quentin Jaussaud ₁ , Ikechukwu Martin Ogbu ₂ , Govind Goroba Pawar ₂ , Etienne Grau ₁ , Frédéric Robert ₂ , Thomas Vidil ₁ , Yannick Landais ₂ , Henri Cramail ₁

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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.

中文翻译：

通过草酸氧化脱羧合成聚氨酯：自吹泡沫的新途径

聚氨酯 (PU) 热塑性塑料和热固性塑料是在二乙酸苯碘 (PIDA) 和多元醇存在下，通过聚肟酸脱羧，逐步聚合原位生成的多异氰酸酯来制备的。反应过程中产生的CO ₂允许通过内源化学发泡获得自发泡聚氨酯泡沫。碘中心的配体交换释放的乙酸也被证明可以加速聚合反应，避免求助于额外的催化剂。在生产过程中改变简单的参数使我们能够获得具有多种特性的软质聚氨酯泡沫。

更新日期：2024-07-29

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