Sulfur and alkali metal containing imidazole fiber having ionically bound halides
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United States of America Patent
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Sep 3, 2019
Grant Date -
Aug 30, 2018
app pub date -
Apr 30, 2018
filing date -
Jan 11, 2012
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Abstract
The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber, the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13° C. to 448.19° C.
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