Fibers of sulfonated poly(p-phenylene terephthalmide)

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

1992-09-30

1994-04-12

Ryan, Patrick J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

264184, D02G 300

Patent

active

053024516

ABSTRACT:
As-spun fiber made from PPD-T with 0.5 to 3.0% sulfur as bound sulfonic acid or sulfonate groups, is disclosed. The fiber and has inherent viscosity greater than 4.5, as-spun 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.

REFERENCES:
patent: 3671542 (1972-06-01), Kwolek
patent: 3767756 (1973-10-01), Blades
patent: 3869429 (1975-03-01), Blades
patent: 4075269 (1978-02-01), Jones, Jr. et al.
patent: 4162346 (1979-07-01), Jones et al.
patent: 4368615 (1983-01-01), Lammers
patent: 4511623 (1985-04-01), Yoon et al.

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