POLYBENZAZOLES AND POLYBENZAZOLE PRECURSORS
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Apr 24, 2008
filing date -
Apr 30, 2007
priority date (Note) -
Abandoned
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Abstract
has the para configuration and 40-100% of the repeating units are repeating unit I and/or repeating unit II and wherein the polybenzazole contains less than 1500 ppm of non-extractable phosphorus compound if 100% of the repeating units are repeating unit I and/or repeating unit II and X and Y are the same. The method allows the manufacture of phosphorous element free a fiber, pulp, fibril, or fibrid containing said polybenzazole precursor or polybenzazole and a spinning method for obtaining said fiber, pulp, fibril, or fibrid.
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