Process for preparing aromatic polyimide fibers
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United States of America Patent
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Jan 3, 1995
Grant Date -
N/A
app pub date -
Jun 16, 1993
filing date -
Jun 16, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for preparing polyimide fibers involves the preparation of a polymer in p-chlorophenol from reactants comprising 2,2'-dimethyl-4,4'-diaminobiphenyl and a tetracarboxylic anhydride. Following its preparation, the polyimide fibers can be spun directly from the reaction mixture. In a preferred embodiment, the dianhydride comprises 3,3',4,4'-biphenyltetracarboxylic dianhydride.
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