Coating processes – With post-treatment of coating or coating material – Chemical agent applied to treat coating
Patent
1977-09-23
1979-05-15
Smith, John D.
Coating processes
With post-treatment of coating or coating material
Chemical agent applied to treat coating
427342, 427353, 427354, 427359, 427365, 427390D, 428921, C09K 328, C09D 518, D06M 1344
Patent
active
041548787
ABSTRACT:
An improved, safe and economical process for impregnating a cellulose fabric with a flame retardant compound comprises: (a) impregnating the fabric with an aqueous solution of a phosphonium salt precondensate and a buffer; (b) adjusting the wet pick-up of the fabric and the concentration of the phosphonium salt precondensate in the pad bath such that the impregnated fabric has a phosphorus content of from about 3% to about 4% and a moisture content of from about 10% to about 20% both based on the weight of the fabric; and (c) without the necessity of drying the impregnated fabric, exposing it to ammonia in an amount and for a period of time sufficient to cure the compound. The impregnated fabric may then be subjected to conventional oxidation and process washing steps to yield the finished fabric.
REFERENCES:
patent: 2983623 (1961-05-01), Coates
patent: 3310420 (1967-03-01), Wagner
patent: 3784356 (1974-01-01), Wagner
patent: 3903336 (1975-09-01), Nachbur et al.
patent: 4026711 (1977-05-01), Wayker et al.
patent: 4078101 (1978-03-01), Cole
Baitinger William F.
Beard McDaniel L.
Cotton Incorporated
Smith John D.
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