Process for fire-proofing treatment of shaped articles of aromat

Details Process for fire-proofing treatment of shaped articles of aromat Process for fire-proofing treatment of shaped articles of aromat

1974-09-24

1977-02-15

Gwinnell, Harry J.

Coating processes

With post-treatment of coating or coating material

Heating or drying

106 15FP, 252 81, 428272, 428474, 428921, 427379, B05D 302

Patent

active

040083454

ABSTRACT:
A process for fire-proofing treatment of shaped articles of aromatic polyamides which comprises contacting a shaped article of an aromatic polyamide with an aqueous solution of a phosphorus-containing inorganic compound free from halogen and sulfur, drying it and then post heat-treating it; characterized in that said shaped article is contacted with an aqueous solution of a treating compound selected from the group consisting of halogen- and sulfur-free, phosphorus-containing inorganic acids and their ammonium, amine and urea salts in a concentration of about 2 to about 30% by weight, dried at a temperature of not more than about 150.degree. C., and then post heat-treated at a temperature of about 300.degree. C. to about 450.degree. C.

REFERENCES:
patent: 2482755 (1949-09-01), Ford et al.
patent: 2606115 (1952-08-01), Nuessle et al.
patent: 3253881 (1966-05-01), Donahue et al.
patent: 3549307 (1970-12-01), Hirsch
patent: 3562197 (1971-02-01), Sears et al.
patent: 3576590 (1971-04-01), Hirsch
patent: 3576769 (1971-04-01), Hirsch et al.
patent: 3607798 (1971-09-01), Hirsch
patent: 3723074 (1973-03-01), Sears et al.
patent: 3896250 (1975-07-01), Miller
patent: 3900664 (1975-08-01), Miller

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