PROCESS FOR PREPARING ARAMID COPOLYMER YARN HAVING LOW RESIDUAL SULFUR
摘要
The present invention concerns methods for producing a yarn comprising the steps of: (a) producing a plurality of dope filaments by spinning a polymer solution in sulfuric acid through a multi-hole spinneret, the polymer comprising imidazole groups; (b) coagulating the plurality of dope filaments into an as-spun yarn; (c) contacting the yarn with an aqueous base having a pKa less than or equal to 11; and (d) rinsing the yarn.
申请公布号
EP2802699(A1)
申请公布日期
2014.11.19
申请号
EP20120701803
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;LUSTIG, STEVE, R.;NEWTON, CHRISTOPHER WILLIAM;RODINI, DAVID J.;SITTER, ANDREW J.