Invention Grant
- Patent Title: Process for preparing aramid copolymer yarn using a halide acid wash
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Application No.: US14371760Application Date: 2012-01-11
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Publication No.: US10240282B2Publication Date: 2019-03-26
- Inventor: Steven R. Allen , Vlodek Gabara , Joseph Lenning Lowery , Christopher William Newton , David J. Rodini , Andrew J. Sitter
- Applicant: Steven R. Allen , Vlodek Gabara , Joseph Lenning Lowery , Christopher William Newton , David J. Rodini , Andrew J. Sitter
- Applicant Address: US DE Wilmington
- Assignee: E I DU PONT DE NEMOURS AND COMPANY
- Current Assignee: E I DU PONT DE NEMOURS AND COMPANY
- Current Assignee Address: US DE Wilmington
- International Application: PCT/US2012/020951 WO 20120111
- International Announcement: WO2013/105955 WO 20130718
- Main IPC: D06M11/26
- IPC: D06M11/26 ; D01D10/06 ; D01F6/80
Abstract:
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 comprising a halide; and c) rinsing the yarn.
Public/Granted literature
- US20140331415A1 PROCESS FOR PREPARING ARAMID COPOLYMER YARN USING A HALIDE ACID WASH Public/Granted day:2014-11-13
Information query
