Process for producing homogeneous phase melt of polyacrylonitrile
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United States of America Patent
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Oct 28, 1997
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N/A
app pub date -
Dec 27, 1995
filing date -
Jan 9, 1995
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Expired
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Abstract
A process for producing a homogeneous phase melt of polyacrylonitrile suitable for extrusion molding and melt spinning, by the steps of preparing polymer/water crumb containing 30-60 wt % of polyacrylonitrile and dewatering the crumb in a molten state with stirring at temperatures above 140.degree. C. and at pressures above autogenous pressure until the concentration of the polymer in the crumb exceeds 70% by weight.
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