High performance wholly aromatic polyamide fibers

Details High performance wholly aromatic polyamide fibers High performance wholly aromatic polyamide fibers

1977-11-29

1979-07-24

Kendell, Lorraine T.

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

428474, 528337, D02G 300

Patent

active

041623460

ABSTRACT:
High performance wholly aromatic polyamide fibers are provided possessing a novel chemical structure. The fibers of the present invention have chain extending bonds from the aromatic nuclei thereof which are coaxial or parallel and oppositely directed, and have a sulfur content of about 0.5 to 10 percent by weight (e.g. 0.5 to 3 percent by weight) as sulfonic acid and/or sulfonate groups attached to the aromatic nuclei. Not only do the fibers exhibit highly satisfactory tenacity (at least 15 grams per denier), elongation (at least 1.5 percent), and initial modulus (at least 400 grams per denier), but they exhibit an increased resistance to burning when compared to conventional unsubstituted aromatic polyamides. The fibers also exhibit particularly good resistance to organic solvents.

REFERENCES:
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patent: 3671542 (1972-06-01), Kwolek
patent: 3817941 (1974-06-01), Blair et al.
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patent: 3864791 (1974-04-01), Morgan
patent: 3869429 (1975-03-01), Blades
patent: 3869430 (1975-03-01), Blades
patent: 3870685 (1975-03-01), Jones et al.
patent: 3991037 (1976-11-01), Eckardt
patent: 3996202 (1976-12-01), Keil
patent: 4075172 (1978-02-01), Ozawa et al.

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