Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 18, 2008
Patent Application Number
10808266
Date Filed
March 17, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
An aromatic ether oligomer or polyaromatic ether comprising the formula:O—Arn; wherein Ar is an independently selected divalent aromatic radical; formed by reacting a dihydroxyaromatic with a dihaloaromatic; and wherein the reaction is performed in the presence of a copper compound and cesium carbonate. The polyaromatic ether is formed when neither the dihydroxyaromatic nor the dihaloaromatic is present in an excess amount. The aromatic ether oligomer is formed by using an excess of either dihydroxyaromatic or dihaloaromatic. A phthalonitrile monomer comprising the formula:
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