METHODS FOR THE PREPARATION OF IMIDES, MALEIMIDES AND MALEIMIDE-TERMINATED POLYIMIDE COMPOUNDS
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
Jan 28, 2008
filing date -
Jan 26, 2007
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Abandoned
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Abstract
Provided herein are methods for preparing maleimides, polyimides and maleimide-terminated polyimides. Specifically disclosed are methods for preparing maleimides from N-substituted maleamic acids in the presence of an alcohol catalyst and an acid co-catalyst in a solvent. Also disclosed are methods for preparing polyimides by reacting a diamine with a dianhydride in a reaction medium that includes a solvent and a polar protic co-solvent. Further provided are methods for preparing maleimide-terminated polyimides from diamines in an aromatic solvent containing a polar protic co-solvent.
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