US4151322A — Production of flame retardant fiber blend having …

Claim 1

Independent Claim 203 words

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) intimately blending in physical admixture with said polyester and cotton fibers cotton additive fibers of synthetic aromatic polyester polymer containing chlorine, bromine, or mixtures thereof chemically bound to an aromatic ring having a chlorine and/or bromine content of about 25 to 60 percent by weight based upon the weight of said aromatic polymer in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and synthetic aromatic polyester polymer, with said fibers of synthetic aromatic polymer being substantially free of an oxide of antimony, and (b) applying a topical application of an organophosphorus flame retardant to said resulting fiber blend in a minor concentration of about 2 to 20 percent by weight based upon the total weight of the fibers of polyester, cotton, and synthetic aromatic polymer wherein said fibers are rendered non-burning when subjected to a methane diffusion flame at ambient conditions and exhibit desirable textile properties.

Claim 2

Dependent Claim 203 words

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) intimately blending in physical admixture with said polyester and cotton fibers cotton additive fibers of synthetic aromatic polyester polymer containing chlorine, bromine, or mixtures thereof chemically bound to an aromatic ring having a chlorine and/or bromine content of about 25 to 60 percent by weight based upon the weight of said aromatic polymer in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and synthetic aromatic polyester polymer, with said fibers of synthetic aromatic polymer being substantially free of an oxide of antimony, and (b) applying a topical application of an organophosphorus flame retardant to said resulting fiber blend in a minor concentration of about 2 to 20 percent by weight based upon the total weight of the fibers of polyester, cotton, and synthetic aromatic polymer wherein said fibers are rendered non-burning when subjected to a methane diffusion flame at ambient conditions and exhibit desirable textile properties.

Claim 3

Dependent Claim 28 words

A process for rendering flame retardant an admixture of discrete polyester and cotton fibers in accordance with claim 1 wherein said polyester fibers are substantially all polyethylene terephthalate.

Claim 4

Dependent Claim 44 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein said admixture of discrete fibers comprises about 65 percent by weight of said polyester fibers and about 35 percent by weight of said cotton fibers.

Claim 5

Dependent Claim 36 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein said additive fibers have a chlorine and/or bromine content of about 25 to 50 percent by weight.

Claim 6

Dependent Claim 32 words

A process for rendering flame regardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein bromine is chemically bound to an aromatic ring of said discrete additive fibers.

Claim 7

Dependent Claim 32 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein chlorine is chemically bound to an aromatic ring of said discrete additive fibers.

Claim 8

Dependent Claim 44 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein said blend of fibers is provided in fabric form prior to applying said topical application of an organophosphorus flame retardant in accordance with step (b).

Claim 9

Dependent Claim 25 words

A process for rendering non-burning an admixture of polyester and cotton fibers in accordance with claim 1 wherein retardant organophosphorus flame retrdant is a polyphosphonate.

Claim 10

Dependent Claim 58 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 1 wherein said organophosphorus flame retardant is applied to said resulting fiber blend in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and synthetic aromatic polyester polymer.

Claim 11

Dependent Claim 215 words

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) intimately blending in physical admixture with said polyester and cotton fibers discrete additive fibers of a halogenated aromatic polyester of the recurring structural formula: ##STR6## where X is chlorine or bromine, Y is hydrogen, chlorine or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n = at least 25, in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and halogenated aromatic polyester, with said fibers of said halogenated aromatic polyester being substantially free of an oxide of antimony, and (b) applying a topical application of an organophosphorus flame retardant to said fiber blend in a minor concentration of about 2 to 15 percent by weight based upon the total weight of the fibers of polyester, cotton, and halogenated aromatic polyester wherein said resulting fibers are rendered non-burning when subjected to a methane diffusion flame at ambient conditions and exhibit desirable textile properties.

Claim 12

Dependent Claim 215 words

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) intimately blending in physical admixture with said polyester and cotton fibers discrete additive fibers of a halogenated aromatic polyester of the recurring structural formula: ##STR6## where X is chlorine or bromine, Y is hydrogen, chlorine or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n = at least 25, in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and halogenated aromatic polyester, with said fibers of said halogenated aromatic polyester being substantially free of an oxide of antimony, and (b) applying a topical application of an organophosphorus flame retardant to said fiber blend in a minor concentration of about 2 to 15 percent by weight based upon the total weight of the fibers of polyester, cotton, and halogenated aromatic polyester wherein said resulting fibers are rendered non-burning when subjected to a methane diffusion flame at ambient conditions and exhibit desirable textile properties.

Claim 13

Dependent Claim 28 words

A process for rendering flame retardant an admixture of discrete polyester and cotton fibers in accordance with claim 10 wherein said polyester fibers are substantially all polyethylene terephthalate.

Claim 14

Dependent Claim 44 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein said admixture of discrete fibers comprises about 65 percent by weight of said polyester fibers and about 35 percent by weight of said cotton fibers.

Claim 15

Dependent Claim 30 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein X and Y are of said halogenated aromatic polyester are bromine.

Claim 16

Dependent Claim 43 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein said fibers of halogenated aromatic polyester are formed by the reaction of tetrabromobisphenol A, isophthalic acid, and terephthalic acid or the ester-forming derivatives thereof.

Claim 17

Dependent Claim 57 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein said fibers of halogenated aromatic polyester are formed by the reaction of tetrabromobisphenol A and a mixture of about 45 to 75 percent by weight of isophthaloyl chloride and about 55 to 25 percent by weight terephthaloyl chloride.

Claim 18

Dependent Claim 43 words

A process for rendering flame retardant an admixture of polyester and coton fibers in accordance with claim 10 wherein said blend of fibers is provided in fabric form prior to applying said topical application of organophosphorus flame retardant in accordance with step (b).

Claim 19

Dependent Claim 26 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein said organophosphorus flame retardant is a polyphosphonate.

Claim 20

Dependent Claim 57 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 10 wherein said organophosphorus flame retardant is applied to said resulting fiber blend in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and halogenated aromatic polyester.

Claim 21

Dependent Claim 198 words

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) intimately blending in physical admixture with said polyester and cotton fibers discrete additive fibers of a brominated aromatic polyester formed by the reaction of tetrabromobisphenol A and a mixture of 45 to 75 percent by weight isophthaloyl chloride and about 55 to 25 percent by weight terephthaloyl chloride, in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and brominated aromatic polyester, with said fibers of brominated aromatic polyester being substantially free of an oxide of antimony, (b) forming said resulting blend in the form of a fabric, and (c) applying a topical application of an organophosphorus flame retardant to said fabric in a minor concentration of about 2 to 20 percent by weight based upon the total weight of said fabric wherein said fabric is non-burning when subjected to a methane diffusion flame at ambient conditions and exhibits desirable textile properties.

Claim 22

Dependent Claim 198 words

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) intimately blending in physical admixture with said polyester and cotton fibers discrete additive fibers of a brominated aromatic polyester formed by the reaction of tetrabromobisphenol A and a mixture of 45 to 75 percent by weight isophthaloyl chloride and about 55 to 25 percent by weight terephthaloyl chloride, in a quantity of about 10 to 40 percent by weight based upon the total weight of said fibers of polyester, cotton and brominated aromatic polyester, with said fibers of brominated aromatic polyester being substantially free of an oxide of antimony, (b) forming said resulting blend in the form of a fabric, and (c) applying a topical application of an organophosphorus flame retardant to said fabric in a minor concentration of about 2 to 20 percent by weight based upon the total weight of said fabric wherein said fabric is non-burning when subjected to a methane diffusion flame at ambient conditions and exhibits desirable textile properties.

Claim 23

Dependent Claim 28 words

A process for rendering flame retardant an admixture of discrete polyester and cotton fibers in accordance with claim 19 wherein said polyester fibers are substantially all polyethylene terephthalate.

Claim 24

Dependent Claim 44 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 19 wherein said admixture of discrete fibers comprises about 65 percent by weight of said polyester fibers and about 35 percent by weight of said cotton fibers.

Claim 25

Dependent Claim 26 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 19 wherein said organophosphorus flame retardant is a polyphosphonate.

Claim 26

Dependent Claim 57 words

A process for rendering flame retardant an admixture of polyester and cotton fibers in accordance with claim 19 wherein said organophosphorus flame retardant is applied to said resulting fiber blend in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and brominated aromatic polyester.

Claim 27

Dependent Claim 150 words

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) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent polyethylene terephthalate. (b) about 20 to 40 percent by weight of cotton fibers, and (c) about 10 to 40 percent by weight of synthetic aromatic polyester polymer fibers containing chlorine, bromine, or mixtures thereof chemically bound to an aromatic ring having a chlorine and/or bromine content of about 25 to 60 percent by weight based upon the weight of said synthetic aromatic polyester polymer which are substantially free of an oxide of antimony, wherein said admixture bears a topically applied organophosphorus flame retardant in a concentration of about 2 to 20 percent by weight based upon the weight of said fiber admixture absent said organophosphorus flame retardant.

Claim 28

Dependent Claim 150 words

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) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent polyethylene terephthalate. (b) about 20 to 40 percent by weight of cotton fibers, and (c) about 10 to 40 percent by weight of synthetic aromatic polyester polymer fibers containing chlorine, bromine, or mixtures thereof chemically bound to an aromatic ring having a chlorine and/or bromine content of about 25 to 60 percent by weight based upon the weight of said synthetic aromatic polyester polymer which are substantially free of an oxide of antimony, wherein said admixture bears a topically applied organophosphorus flame retardant in a concentration of about 2 to 20 percent by weight based upon the weight of said fiber admixture absent said organophosphorus flame retardant.

Claim 29

Dependent Claim 24 words

A flame retardant admixture of discrete fibers in accordance with claim 24 wherein said polyester fibers of component (a) are substantially all polyethylene terephthalate.

Claim 30

Dependent Claim 26 words

A flame retardant admixture of discrete fibers in accordance with claim 24 wherein the fibers of component (c) have bromine chemically bound to an aromatic ring.

Claim 31

Dependent Claim 26 words

A flame retardant admixture of discrete fibers in accordance with claim 24 wherein the fibers of component (c) have chlorine chemically bound to an aromatic ring.

Claim 32

Dependent Claim 20 words

A flame retardant admixture of discrete fibers in accordance with claim 24 wherein said organophosphorus flame retardant is a polyphosphonate.

Claim 33

Dependent Claim 50 words

A flame retardant admixture of discrete fibers in accordance with claim 24 wherein said organophosphorous flame retardant is applied to said admixture in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and synthetic aromatic polyester polymer.

Claim 34

Dependent Claim 21 words

A flame retardant admixture of discrete fibers in accordance with claim 24 which is present in the form of a fabric.

Claim 35

Dependent Claim 158 words

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) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent polyethylene terephthalate, (b) about 20 to 40 percent by weight cotton fibers, and (c) about 10 to 40 percent by weight of fibers of halogenated aromatic polyester of the recurring structural formula: ##STR7## where X is chlorine or bromine, Y is hydrogen, chlorine or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n= at least 25, which are substantially free of an oxide of antimony, wherein said admixture bears a topically applied organophosphorus flame retardant and a concentration of about 2 to 20 percent by weight based upon the weight of said fiber admixture absent said organophosphorus flame retardant.

Claim 36

Dependent Claim 158 words

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) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent polyethylene terephthalate, (b) about 20 to 40 percent by weight cotton fibers, and (c) about 10 to 40 percent by weight of fibers of halogenated aromatic polyester of the recurring structural formula: ##STR7## where X is chlorine or bromine, Y is hydrogen, chlorine or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n= at least 25, which are substantially free of an oxide of antimony, wherein said admixture bears a topically applied organophosphorus flame retardant and a concentration of about 2 to 20 percent by weight based upon the weight of said fiber admixture absent said organophosphorus flame retardant.

Claim 37

Dependent Claim 24 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein said polyester fibers of component (a) are substantially all polyethylene terephthalate.

Claim 38

Dependent Claim 26 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein the fibers of component (c) have bromine chemically bound to an aromatic ring.

Claim 39

Dependent Claim 26 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein the fibers of component (c) have chlorine chemically bound to an aromatic ring.

Claim 40

Dependent Claim 20 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein said organophosphorus flame retardant is a polyphosphonate.

Claim 41

Dependent Claim 49 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein said organophosphorus flame retardant is applied to said admixture in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and halogenated aromatic polyester.

Claim 42

Dependent Claim 47 words

A flame retardant admixture of discrete fibers in accordance with claim 31 wherein fiber component (a) comprises about 40 to 50 percent by weight, fiber component (b) comprises about 25 to 35 percent by weight, and fiber component (c) comprises about 15 to 30 percent by weight.

Claim 43

Dependent Claim 21 words

A flame retardant admixture of discrete fibers in accordance with claim 31 which is present in the form of a fabric.

Claim 44

Dependent Claim 149 words

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: (a) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent of polyethylene terephthalate, (b) about 20 to 40 percent by weight of cotton fibers, and (c) about 10 to 40 percent by weight of brominated polyester fibers formed by the reaction of tetrabromobisphenol A and a mixture of 45 to 75 percent by weight isophthaloyl chloride and about 55 to 25 percent by weight of terephthaloyl chloride, which are substantially free of an oxide of antimony, wherein said admixture in fabric form bears a topically applied organophosphorus flame retardant in a concentration of about 2 to 20 percent by weight based upon the weight of the fiber admixture absent said organophosphorus flame retardant.

Claim 45

Dependent Claim 149 words

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: (a) about 35 to 55 percent by weight of polyester fibers which comprise at least 85 mole percent of polyethylene terephthalate, (b) about 20 to 40 percent by weight of cotton fibers, and (c) about 10 to 40 percent by weight of brominated polyester fibers formed by the reaction of tetrabromobisphenol A and a mixture of 45 to 75 percent by weight isophthaloyl chloride and about 55 to 25 percent by weight of terephthaloyl chloride, which are substantially free of an oxide of antimony, wherein said admixture in fabric form bears a topically applied organophosphorus flame retardant in a concentration of about 2 to 20 percent by weight based upon the weight of the fiber admixture absent said organophosphorus flame retardant.

Claim 46

Dependent Claim 27 words

A flame retardant admixture of discrete fibers in fabric form in accordance with claim 39 wherein the polyester fibers of component (a) are substantially all polyethylene terephthalate.

Claim 47

Dependent Claim 44 words

A flame retardant admixture of discrete fibers in fabric form in accordance with claim 39 wherein fiber component (c) is formed by the reaction of tetrabromobisphenol A and a mixture of about 60 mole percent isophthaloyl chloride, and about 40 mole percent terephthaloyl chloride.

Claim 48

Dependent Claim 50 words

A flame retardant admixture of discrete fibers in fabric form in accordance with claim 39 wherein fiber component (a) comprises about 40 to 50 percent by weight, fiber component (b) comprises about 25 to 35 percent by weight, and fiber component (c) comprises about 15 to 30 percent by weight.

Claim 49

Dependent Claim 22 words

A flame retardant admixture of discrete fibers in fabric form in accordance with claim 39 wherein said fabric is a woven fabric.

Claim 50

Dependent Claim 22 words

A flame retardant admixture of discrete fibers in fabric form in accordance with claim 39 wherein said fabric is a knitted fabric.

Claim 51

Dependent Claim 48 words

A flame retardant admixture of discrete fibers in accordance with claim 39 wherein said organophosphorus flame retardant is applied to said admixture in a minor concentration of about 6 to 16 percent by weight based upon the total weight of the fibers of polyester, cotton, and brominated polyester.

Claim 52

Dependent Claim 20 words

A flame retardant admixture of discrete fibers in accordance with claim 45 wherein said organophosphorus flame retardant is a polyphosphonate.

Claim 53

Dependent Claim 21 words

A flame retardant admixture of discrete fibers in accordance with claim 46 wherein said polyphosphonate flame retardant is a vinyl phosphonate.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-04-23	1982-10-23	1983-04-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-04-23	1986-10-23	1987-04-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-04-23	1990-10-23	1991-04-24	$7700.00	Window Closed / Lapsed

Production of flame retardant fiber blend having desirable textile properties comprising polyester and cotton fibers

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