Processes for polyurethane polymerization are provided. The processes use polysilyl derivatives of germanium and tin as catalysts. Polyurethanes made using the catalysts have increased gel times as compared to polyurethanes made using conventional processes.

 
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< Ionic liquids

> Stabilized divalent germanium and tin compounds, processes for making the compounds, and processes using the compounds

> Process for the synthesis of hydroxy aromatic acids
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