PREPARATION OF POLYISOCYANATES CONTAINING URETDIONE GROUPS

摘要

PROBLEM TO BE SOLVED: To provide a method for using cycloalkylphosphines as catalysts for isocyanate dimerization and to provide a process for preparing polyisocyanates containing uretdione groups. SOLUTION: The polyisocyanates containing uretdione groups is produced by reacting at least one organic isocyanate with a catalyst containing at least one phosphine containing at least one cycloaliphatic groups directly bonding to phosphorus, optionally one or more solvents and optionally one or more additives. COPYRIGHT: (C)2004,JPO