Process for preparing filaments, fibers and sheets of aromatic p

Details Process for preparing filaments, fibers and sheets of aromatic p Process for preparing filaments, fibers and sheets of aromatic p

1974-03-14

1976-11-09

Woo, Jay H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 78R, 260 78SC, 264184, C08G 6944

Patent

active

039910377

ABSTRACT:
Limpid solutions suitable for making filaments and sheets of mostly aromatic polyamides are obtained by precondensation of the initial materials up to a conversion rate of from 80 to 98% in a solvent, neutralization with ammonia, separation of the insoluble ammonium halide, addition of an inorganic base, evacuation of the ammonia set free, subsequent after condensation and neutralization of the hydrogen halide newly formed.
The spinning solutions prepared according to this process are stable and limpid and are excellently suitable for the preparation of shaped articles.

REFERENCES:
patent: 3063966 (1962-11-01), Kwolek et al.
patent: 3079219 (1963-02-01), King
patent: 3300450 (1967-01-01), Clay
patent: 3642706 (1972-02-01), Morgan
patent: 3767756 (1973-10-01), Blades
patent: 3775361 (1973-11-01), Jensen
patent: 3796693 (1974-03-01), Morgan et al.
patent: 3819587 (1974-06-01), Kwolek

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