| http://www.w3.org/ns/prov#value | - A wide variety of catalysts known for promoting the urethane reaction can be employed including amines such as triethylamine; tetramethyl-1,3-butanediamine; triethylenediamine, and derivatives of metals including tin, bismuth, vanadium and iron, and in particular dibutylin dilaurate, dibutylin diacetate, bismuth nitrate and the like.
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