Siloxane-containing polymers
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United States of America Patent
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Mar 24, 1987
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N/A
app pub date -
Oct 24, 1985
filing date -
Oct 24, 1984
priority date (Note) -
Expired
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Abstract
Polyamic acids prepared from the condensation of dianhydrides (or trianhydrides) and diamines and preferably dissolved in a suitable solvent produce polyimide shaped articles (e.g. films) relatively free of voids, pinholes, cracks and bubbles when about 0.75 to about 5 mole percent of a polysiloxane is incorporated in the backbone of the polyamic acid.
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