Process for the production of stabilized acrylic fibers which are particularly suited for thermal conversion to carbon fibers
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United States of America Patent
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Dec 21, 1982
Grant Date -
N/A
app pub date -
Oct 14, 1981
filing date -
Oct 14, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved process for the relatively rapid thermal stabilization of a multifilamentary acrylic fibrous material in the substantial absence of filament coalescence is provided. The fibrous material is initially contacted with a solution of hydroxylamine (as described), and subsequently with a solution of ammonium permanganate, calcium permanganate, magnesium permanganate, or mixtures thereof (as described). The resulting fibrous material which possesses a chemically altered structure is heated in an oxygen-containing atmosphere until a thermally stabilized acrylic fibrous material is formed which is capable of undergoing carbonization and is non-burning when subjected to an ordinary match flame.
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