Polyimides having high Tg, high TOS, and low moisture regain
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United States of America Patent
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Oct 3, 2000
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N/A
app pub date -
Jun 1, 1999
filing date -
Dec 5, 1996
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Abstract
Polyimide polymers from 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4,3',4'-benzophenonetetracarboxylic dianhydride and a diamine such as p-phenylenediamine exhibit a high glass transition temperature, high thermal oxidative stability and low moisture regain, useful for structural applications.
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