US Patent 7709680 Preparation of polyisocyanates containing uretdione groups using phosphine catalysts
Patent 7709680 was granted and assigned to Bayer MaterialScience on May, 2010 by the United States Patent and Trademark Office.
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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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US Patent 07709680 Preparation of polyisocyanates containing uretdione groups using phosphine catalysts US Patent 7709680 Preparation of polyisocyanates containing uretdione groups using phosphine catalysts
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Patent Number
0770968000
Patent Number
770968000
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Official Website
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077096800
Date of Patent
May 4, 2010
0Patent Application Number
120828030
Date Filed
April 14, 2008
0Official Website
Patent Primary Examiner
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077096800
Date of Patent
May 4, 2010
0Patent Application Number
120828030
Date Filed
April 14, 2008
0Official Website
Patent Primary Examiner
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US Patent 07709680 Preparation of polyisocyanates containing uretdione groups using phosphine catalysts
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07709680
Date of patent
May 4, 2010
Patent application number
12082803
Date Filed
April 14, 2008
Patent primary examiner
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