Coating processes – With pretreatment of the base – Etching – swelling – or dissolving out part of the base
Patent
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.
Jackson, Jr. Charles E.
Kasowski Robert V.
Lee Kiu-Seung
Beck Shrive
Dang Vi Duong
E. I. Du Pont de Nemours and Company
Evans Susan B.
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