Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
May 4, 2010
Patent Application Number
12082803
Date Filed
April 14, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
The invention provides a process for isocyanate dimerization (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups, using specific phosphines as catalysts. The phosphines have one or two tertiary alkyl radicals bound directly to phosphorus.
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