发明名称 PROCESS FOR PREPARING ARAMID COPOLYMER YARN USING AN ACID WASH
摘要 <p>The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid solution of pH 5 or lower; and c) rinsing the yarn.</p>
申请公布号 EP2802693(A1) 申请公布日期 2014.11.19
申请号 EP20120701798 申请日期 2012.01.11
申请人 E. I. DU PONT DE NEMOURS AND COMPANY 发明人 ALLEN, STEVEN, R.;GABARA, VLODEK;LOWERY, JOSEPH, LENNING;NEWTON, CHRISTOPHER, WILLIAM;RODINI, DAVID, J.;SITTER, ANDREW, J.
分类号 D01D10/06;D01F6/80 主分类号 D01D10/06
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