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<p>Different germanium carboxylates were synthesized and evaluated as catalysts for (poly)urethane formation. For this purpose, the catalysts were tested in a first model reaction, synthesis of a diurethane. The 3 compounds showed promising catalytic activity towards urethane formation. A two center catalyst achieved the highest activity. Afterwards the catalysts were tested in polyurethane synthesis and materials with different properties were obtained. The catalyst PAAGe(OAc)<sub>3</sub> exhibited a performance in a similar range as a standard industry catalyst. Overall, this work demonstrated for the first time, the viability of germanium carboxylate catalysts as efficient and tin-free alternatives in urethane synthesis.</p> Graphical abstract <p></p>

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Germanium carboxylates as catalysts in the polyurethane synthesis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月14日

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  • Christoph Garstenauer,
  • Karin Bartl,
  • Frank Uhlig

摘要

Different germanium carboxylates were synthesized and evaluated as catalysts for (poly)urethane formation. For this purpose, the catalysts were tested in a first model reaction, synthesis of a diurethane. The 3 compounds showed promising catalytic activity towards urethane formation. A two center catalyst achieved the highest activity. Afterwards the catalysts were tested in polyurethane synthesis and materials with different properties were obtained. The catalyst PAAGe(OAc)3 exhibited a performance in a similar range as a standard industry catalyst. Overall, this work demonstrated for the first time, the viability of germanium carboxylate catalysts as efficient and tin-free alternatives in urethane synthesis.

Graphical abstract