Stabilization of acrylic fibers and films

Details Stabilization of acrylic fibers and films Stabilization of acrylic fibers and films

1971-11-18

1977-01-18

Gwinnell, Harry J.

Coating processes

With post-treatment of coating or coating material

Heating or drying

106 15FP, 427430R, 428394, 428921, B05D 302

Patent

active

040040534

ABSTRACT:
An improved process for the thermal stabilization of an acrylic fibrous material or film is provided. The fibrous precursor or film is impregnated with an organic antioxidant by contact with a solution of the same provided at a moderate temperature, dried to remove the solvent, and heated in an oxygen-containing atmosphere at a more highly elevated temperature until a stabilized fibrous material or film is formed. The organic antioxidant advantageously serves to moderate the oxidative portion of the stabilization reaction and enables the cyclization portion thereof to proceed in the absence of substantial polymer chain degradation. The resulting stabilized fibrous material or film is flexible and non-burning, and may be utilized as a fire resistant fiber, fabric or film, or optionally carbonized or carbonized and graphitized to form a carbonaceous fibrous material or film.

REFERENCES:
patent: 2931694 (1960-04-01), Wirth et al.
patent: 3546163 (1970-12-01), Peterli
patent: 3637809 (1972-01-01), Kleiner
patent: 3677942 (1972-07-01), Feiner et al.
patent: 3708326 (1973-01-01), Chenevey et al.
patent: 3923950 (1975-12-01), Gump et al.

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