Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
December 23, 2008
Patent Application Number
11171709
Date Filed
June 30, 2005
Patent Primary Examiner
Patent abstract
The present invention relates to a process for preparing amino-functional polyurethane prepolymers bya) preparing an NCO-functional polyurethane prepolymer by reacting an excess of one or more di- and/or polyisocyanates with at least one isocyanate-reactive compound having a functionality of at least 1.5,b) reacting the free NCO groups of the resulting polyurethane prepolymer with at least one compound containing one or more silanol groups to obtain the corresponding silylurethanes, and thenc) converting the silylurethanes to amino-functional polyurethane prepolymers by hydrolysis and/or alcoholysis with decarboxylation.
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