Process for preparing aramid copolymer yarn using a halide acid wash

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United States of America Patent

PATENT NO 10240282
APP PUB NO 20140331415A1
SERIAL NO

14371760

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
DUPONT SAFETY & CONSTRUCTION INC974 CENTER ROAD CHESTNUT RUN PLAZA 730 WILMINGTON DE 19805

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Allen, Steven R Midlothian, US 35 170
Gabara, Vlodek Richmond, US 34 80
Lowery, Joseph Lenning Midlothian, US 14 12
Newton, Christopher William Richmond, US 39 75
Rodini, David J Midlothian, US 35 206
Sitter, Andrew J Mechanicsville, US 12 12

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