Process for flame retarding cellulosics

Details Process for flame retarding cellulosics Process for flame retarding cellulosics

1975-11-03

1978-01-10

Gwinnell, Harry J.

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

118 48, 118304, 118325, 427342, 427353, 428276, 428921, C09K 328, B05D 304

Patent

active

040680266

ABSTRACT:
An improved apparatus and process for imparting durable flame retardancy to textile materials wherein said material is impregnated with a solution having a poly(hydroxymethyl) phosphonium cation content of from about 10 to about 60 percent by weight, dried to a moisture content of from about 0 to about 8 percent, aerated by passing air through the dried material, cured by polymerizing the monomer on and in the cellulose material with exposure in an enclosed chamber to an atmosphere containing gaseous ammonia and thereafter contacting with water, the improvement comprising, impregnating said material with said solution containing poly(hydroxymethyl) phosphonium cation having a pH of from about 2 to about 9, and after contacting said material with said water, further exposing said material to an atmosphere containing gaseous ammonia.

REFERENCES:
patent: 2772188 (1956-11-01), Reeves et al.
patent: 3096201 (1963-07-01), Coates et al.
patent: 3310419 (1967-03-01), Wagner
patent: 3607356 (1971-09-01), Beninate et al.
patent: 3919439 (1975-11-01), Perkins et al.

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