Process for producing articles from polymers containing aromatic imide linkages
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United States of America Patent
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May 31, 1994
Grant Date -
N/A
app pub date -
Apr 20, 1993
filing date -
Apr 20, 1993
priority date (Note) -
Expired
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Abstract
A process for producing shaped or molded articles made of polymer particles containing aromatic imide linkages includes the steps of introducing the polymer particles into a chamber for heating the particles, the chamber having a blade which rotates in the chamber and heats the particles by impacting them; heating the polymer particles to a forming temperature; discharging the polymer particles into a shaping device, such as a mold; and, pressurizing the polymer in the shaping device until the polymer particles consolidate into the shape desired. The process has proven to be effective with polymers that are difficult to process, such as thermoplastic polyimide polymers, polyetherimide polymers, bismaleimide polymers, polyarylate polymers, amideimide polymers, and other polymers containing fully reacted aromatic imide linkages.
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