Process for reducing the flammability of aramids

Details Process for reducing the flammability of aramids Process for reducing the flammability of aramids

1993-03-09

1994-10-18

Beck, Shrive

Coating processes

With pretreatment of the base

Etching, swelling, or dissolving out part of the base

4271261, 427331, 4274301, B05D 100

Patent

active

053566661

ABSTRACT:
Disclosed herein is a process for reducing the flammability of aramids by contacting a solvent swollen or never dried aramid with an aqueous solution of a tungsten compound, removing the solvent from, and then drying the aramid. The resulting aramids have superior Limiting Oxygen Indices, making them particularly useful where lower flammability is desired, as in firefighters' overcoats.

REFERENCES:
patent: 4217409 (1980-08-01), Inoue
patent: 4967548 (1990-11-01), Famgeat
patent: 5167876 (1992-12-01), Lem
Pat. application Ser. No. 07/974,194, filed 11/10/92.

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