| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing isocyanate dimer having high uretdione selectivity. SOLUTION: The method for producing isocyanate dimers comprises reacting isocyanate in the presence of phosphines containing at least one directly phosphorus-attached bicyclic cycloaliphatic group, or the method for producing isocyanate dimers comprises reacting (a) at least one organic isocyanate having≥2 NCO functional value, (b) a catalyst containing at least one phosphine having at least one directly phosphorus-attached bicyclic cycloaliphatic group, and (c) a mixture optionally containing solvent. COPYRIGHT: (C)2005,JPO&NCIPI
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