Fibers of sulfonated poly(p-phenylene terephthalamide)

Details Fibers of sulfonated poly(p-phenylene terephthalamide) Fibers of sulfonated poly(p-phenylene terephthalamide)

D - Textiles, Paper

01

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18/599

D01F 6/60 (2006.01) C08G 69/12 (2006.01) C08G 69/32 (2006.01) C08G 69/48 (2006.01) D01D 5/06 (2006.01)

Patent

CA 2029477

Fiber made from PPD-T with 0.5 to 3.0% sulfur as bound sulfonic acid or sulfonate groups, is disclosed. The fiber has inherent viscosity greater than 9.5, yarn tenacity greater than 20 grams per denier, heat-aged strength retention of greater than 90%, and dipped cord strength greater than 18 gram per denier. The process for making the fiber includes PPD-T sulfonation by exposure to high concentration sulfuric acid in dope preparation under carefully controlled temperature and time.

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