Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 23, 2010
Patent Application Number
11390898
Date Filed
March 27, 2006
Patent Primary Examiner
Patent abstract
The present invention concerns a process for making a polyareneazole polymer comprising the steps of:a) contacting azole-forming monomers, metal powder, and optionally P2O5, in polyphosphoric acid to form a mixture;b) blending the mixture at a temperature of from about 50° C. to about 110° C.;c) further blending the mixture at a temperature of up to about 145° C. to form a solution comprising an oligomer;d) optionally, degassing the solution; ande) reacting the oligomer solution at a temperature of about 160° C. to about 250° C. for a time sufficient to form a polymer.
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