Process of making a sintered polybenzimidazole article
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United States of America Patent
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Aug 29, 1989
Issued Date -
N/A
app pub date -
Jul 25, 1988
filing date -
Sep 3, 1987
priority date (Note) -
Expired
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Abstract
Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.
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