Flame-retardant filaments
AssigneeCourtaulds Limited
InventorDavid John Poynton
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Abstract
Flame-retardant acrylic filaments containing a flame retardant which is the reaction product of a dibasic acid amide, an oxyacid of phosphorus and a polyhydroxy alcohol, the flame retardant being bound to the acrylic filaments by a cross-linking agent. The filaments are made flame-retardant by applying the flame retardant and cross-linking agent to the filaments and subsequently heating the filaments to chemically bind the flame retardant to the acrylic filaments.
Claims11
Acrylic filaments containing a flame retardant which is the reaction product of a dibasic acid amide, an oxyacid of phosphorus and a polyhydroxyl alcohol, the flame retardant being bound to the acrylic filaments by a cross-linking agent selected from the group consisting of tetrakis-hydroxymethyl phosphonium salts, tris-hydroxymethyl phosphine oxide and substituted amines containing two or more amine groups substituted by groups selected from hydroxyalkyl and alkoxyalkyl groups.
Dependencies are inferred from the claim text.