FLAME-RETARDANT FILAMENTS

1299373 Flame retardant filaments COURTAULDSLtd 8 May 1970 [9 May 1969] 23676/69 Heading C3F Flame retardant regenerated cellulose filaments incorporate both tris(2,3-dibromopropyl)- phosphate (T.D.B.P.P.) and a polymer made by reacting tetrakishydroxymethyl phosphonium chloride (T.H.P.C.), or a pre...

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Bibliographische Detailangaben
1. Verfasser:	BRIAN CONRAD GARDNER
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR LAUNDERING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS
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Zusammenfassung:	1299373 Flame retardant filaments COURTAULDSLtd 8 May 1970 [9 May 1969] 23676/69 Heading C3F Flame retardant regenerated cellulose filaments incorporate both tris(2,3-dibromopropyl)- phosphate (T.D.B.P.P.) and a polymer made by reacting tetrakishydroxymethyl phosphonium chloride (T.H.P.C.), or a precondensate formed by reacting T.H.P.C. and urea, and optionally melamine, (preferably in a molar ratio of 2 : 1, plus up to 0À12 melamine if present), with excess ammonia. Preferably the polymer and T.D.B.P.P. total 15-30% by weight of the filaments, based on the weight of cellulose. Preferably T.D.B.P.P. comprises 10-68% and the polymer 90-32% by weight of the total T.D.B.P.P. plus polymer. The polymer preferably is in the form of particles of mean diameter up to 4 Á. The polymer and T.D.B.P.P. may be added to viscose which is spun into a regeneration bath. The polymer, which may be added to the viscose as an aqueous dispersion, is preferably first treated with an oxidizing agent (e.g. H 2 O 2 ).