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AssigneeCelanese Corporation
InventorsArnold J. Rosenthal, Alex S. Forschirm, Bruce P. Barnes
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A blend of discrete polyester and cotton fibers comprising a substantial proportion of polyester fibers (i.e., about 50 to 70 percent by weight polyester fibers based upon the total weight of polyester and cotton fibers) effectively is rendered non-burning while retaining the desirable textile properties (e.g., hand and aesthetic appeal) normally associated with this blend. The polyester and cotton fibers are physically admixed with discrete additive fibers formed from a synthetic aromatic polymer containing chlorine, bromine, or mixtures thereof chemically bound to an aromatic ring which is substantially free of an oxide of antimony (as described), and an organophosphorus flame retardant is topically applied to the resulting blend in a minor concentration (i.e., about 2 to 20 percent by weight based upon the total weight of the fibers of polyester, cotton, and synthetic aromatic polymer). Particularly preferred additive fibers are formed from the reaction product of tetrabromobisphenol A, isophthalic acid and terephthalic acid or the ester-forming derivatives thereof. The resulting admixture of fibers preferably is provided in the configuration of a fabric prior to the topical application of the organophosphorus flame retardant.
A process for rendering flame retardant an admixture of discrete fibers comprising about 50 to 70 percent by weight polyester fibers which comprise at least 85 mole percent polyethylene terephthalate and about 30 to 50 percent by weight cotton fibers consisting essentially of
A process for rendering flame retardant an admixture of discrete fibers comprising about 50 to 70 percent by weight polyester fibers which comprise at least 85 mole percent polyethylene terephthalate and about 30 to 50 percent by weight cotton fibers consisting essentially of:
A process for rendering flame retardant an admixture of discrete fibers comprising about 50 to 70 percent by weight polyester fibers which comprise at least 85 mole percent polyethylene terephthalate and about 30 to 50 percent by weight cotton fibers consisting essentially of:
A flame retardant admixture of discrete fibers possessing desirable textile properties which is non-burning when subjected to a methane diffusion flame at ambient conditions comprising:
A flame retardant admixture of discrete fibers possessing desirable textile properties which is non-burning when subjected to a methane diffusion flame at ambient conditions comprising:
A flame retardant admixture of discrete fibers in fabric form possessing desirable textile properties which is non-burning when subjected to a methane diffusion flame at ambient conditions comprising:
Dependencies are inferred from the claim text.