US3900664A
Expired / Lapsed
US
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Flame proofing of fabrics
Assignee: Occidental Chemical Corp
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Filing: 1973-03-02
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Granted: 1975-08-19
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Expires: 1993-03-02
Abstract
Abstract Normally flammable textile fabrics composed of polyamides such as polyhexamethylene adipamides, polycaproamides, poly(mphenylene isophthalamides) and the like, are rendered highly flame proof by the intimate association therewith of a flame proofing amount of an ammonium acid phosphate, especially monoammonium diacid phosphate. Amounts of ammonium acid phosphates of at least, and preferably in excess of 0.4 percent by weight (in terms of phosphoric acid equivalent) increase the Oxygen Index of the treated fabrics to over 40, and the treated fabrics are non corrosive and non-irritating in nature.
Inventors
- 👤 George T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268; Y10T442/2861; Y10T442/2893; Y10T442/2902
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
50 words
FLAME PROOFED SYNTHETIC FABRIC CONSISTING ESSENTIALLY OF A NORMALLY FLAMMABLE SYNTHETIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLY(HEXAMETHYLENE ADIPAMIDE), POLYCAPROMIDE, AND POLY(M-PHENYLENENEISOPHTHALAMIDE) WHICH MATERIAL CONTAINS A FLAME RETARDANT AMOUNT OF AMMONIUM SALT OF PHOSPHORIC ACID, SELECTED FROM THE GROUP CONSISTING OF MONO AND DIAMMONIUM ACID PHOSPHATE AND MIXTURES THEREOF.
Claim 2
Dependent Claim
50 words
FLAME PROOFED SYNTHETIC FABRIC CONSISTING ESSENTIALLY OF A NORMALLY FLAMMABLE SYNTHETIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLY(HEXAMETHYLENE ADIPAMIDE), POLYCAPROMIDE, AND POLY(M-PHENYLENENEISOPHTHALAMIDE) WHICH MATERIAL CONTAINS A FLAME RETARDANT AMOUNT OF AMMONIUM SALT OF PHOSPHORIC ACID, SELECTED FROM THE GROUP CONSISTING OF MONO AND DIAMMONIUM ACID PHOSPHATE AND MIXTURES THEREOF.
Claim 3
Dependent Claim
30 words
Flame proofed synthetic fabric as claimed in claim 1 wherein the material comprises at least 0.4 percent by weight of a phosphoric acid, which has been neutralized by ammonia gas.
Claim 4
Dependent Claim
33 words
Flame proofed synthetic fabric as claimed in claim 2 wherein the material comprises from about 2.0 to about 25 percent by weight of a phosphoric acid, which has been neutralized by ammonia gas.
Claim 5
Dependent Claim
17 words
Flame proofed synthetic fabric as claimed in claim 2 wherein the phosphoric acid is ortho phosphoric acid.
Claim 6
Dependent Claim
16 words
Flame proofed synthetic fabric as claimed in claim 2 wherein the phosphoric acid is pyrophosphoric acid.
Claim 7
Dependent Claim
15 words
Flame proofed synthetic fabric as claimed in claim 2 wherein the synthetic material is poly(m-phenyleneisophthalamide).
Claim 8
Dependent Claim
15 words
Flame proofed synthetic fabric as claimed in claim 1 wherein the synthetic material is poly(m-phenyleneisophthalamide).
Claim 9
Dependent Claim
23 words
Flame proofed synthetic fibrous fabric as claimed in claim 3 wherein the synthetic material is poly(m-phenyleneisophthalamide) and the phosphoric acid is ortho-phosphoric acid.
Claim 10
Dependent Claim
58 words
The process which consists essentially of the steps of treating a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of poly(hexamethylene adipamide), polycaproamide, and poly(m-phenyleneisophthalamide) with a phosphoric acid to deposit a flame retarding amount of said phosphoric acid on the polymer material, and neutralizing the phosphoric acid with ammonia gas.
Claim 11
Dependent Claim
58 words
The process which consists essentially of the steps of treating a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of poly(hexamethylene adipamide), polycaproamide, and poly(m-phenyleneisophthalamide) with a phosphoric acid to deposit a flame retarding amount of said phosphoric acid on the polymer material, and neutralizing the phosphoric acid with ammonia gas.
Claim 12
Dependent Claim
12 words
The process as described in claim 9 wherein the polymer is poly(m-phenyleneisophthalamide).
Claim 13
Dependent Claim
20 words
The process as described in claim 10 wherein the treated fabric has an Oxygen Index of at least about 40.
Claim 14
Dependent Claim
21 words
The process as described in claim 11 wherein the treated fabric has an Oxygen Index of from 50 to about 60.
Claim 15
Dependent Claim
104 words
The process of applying a fire retardant amount of an acid ammonium salt of a phosphoric acid to a normally flammable synthetic polymer material which consists essentially of: a. applying elemental white phosphorus to a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of polyhexamethylene adipamide, polycaproamide, and poly(m-phenyleneisophthalamide), b. Oxidizing the phosphorus on the material, c. hydrolyzing the oxidized phosphorus on the material to pyrophosphoric acid, the amount of phosphorus applied in step (a) being sufficient to provide a fire retardant amount of pyrophosphoric acid after hydrolysis, and d. neutralizing the pyrophosphoric acid with gaseous ammonia.
Claim 16
Dependent Claim
104 words
The process of applying a fire retardant amount of an acid ammonium salt of a phosphoric acid to a normally flammable synthetic polymer material which consists essentially of: a. applying elemental white phosphorus to a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of polyhexamethylene adipamide, polycaproamide, and poly(m-phenyleneisophthalamide), b. Oxidizing the phosphorus on the material, c. hydrolyzing the oxidized phosphorus on the material to pyrophosphoric acid, the amount of phosphorus applied in step (a) being sufficient to provide a fire retardant amount of pyrophosphoric acid after hydrolysis, and d. neutralizing the pyrophosphoric acid with gaseous ammonia.
Claim 17
Dependent Claim
16 words
The process as claimed in claim 13 wheRein the normally flammable synthetic polymer material is poly(m-phenyleneisophthalamide).
Claim 18
Dependent Claim
36 words
The process as claimed in claim 14 wherein the elemental white phosphorus is applied to the polymer material as an organic solvent solution and the organic solvent is removed by evaporation prior to oxidizing the phosphorus.
Claim 19
Dependent Claim
13 words
The process as claimed in claim 15 wherein the organic solvent is trichloroethylene.
Claim 20
Dependent Claim
74 words
The process of impregnating a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of polyhexamethylene adipamide, polycaproamide and poly(m-phenyleneisophthalamide) with a fire retardant amount of an ammonium salt of phosphoric acid selected from the group consisting of monoammonium acid phosphate acid and diammonium acid phosphate acid which consists essentially of immersing the polymer material in an aqueous solution of said ammonium salt and drying the polymer material.
Claim 21
Dependent Claim
74 words
The process of impregnating a fabric consisting essentially of a normally flammable synthetic polymer material selected from the group consisting of polyhexamethylene adipamide, polycaproamide and poly(m-phenyleneisophthalamide) with a fire retardant amount of an ammonium salt of phosphoric acid selected from the group consisting of monoammonium acid phosphate acid and diammonium acid phosphate acid which consists essentially of immersing the polymer material in an aqueous solution of said ammonium salt and drying the polymer material.
Claim 22
Dependent Claim
11 words
The process of claim 17 wherein the polymer material is poly(m-phenyleneisophthalamide).
Claim 23
Dependent Claim
13 words
The process of claim 17 wherein the ammonium salt is monoammonium acid phosphate.
Claim 24
Dependent Claim
13 words
The process of claim 17 wherein the ammonium salt is diammonium acid phosphate.
Claim 25
Dependent Claim
62 words
A PROCESS FOR INCREASING THE OXYGEN INDEX OF A FABRIC CONSISTING ESSENTIALLY OF A NORMALLY FLAMMABLE SYNTHETIC BOLYMER MATERICAL SELECTED FROM THE GROUP CONSISTING OF POLY(HEXAMETHYLENEADIPAMIDE), POLYCAPROAMIDE, AND POLY(MPHENYLENISOPHTHALAMINE) WHICH CONSISTS ESSENTIALLY OF APPLYING TO SAID POLYMER MATERIAL A FLAME RETARDING AMOUNT OF AT LEAST ONE AMMONIUM SAT OF PHOSOHORIC ACID SELECTED FROM THE GROUP CONSISTING OF MONO AND DIAMMONIUM ACID PHOSPHATE.
Claim 26
Dependent Claim
62 words
A PROCESS FOR INCREASING THE OXYGEN INDEX OF A FABRIC CONSISTING ESSENTIALLY OF A NORMALLY FLAMMABLE SYNTHETIC BOLYMER MATERICAL SELECTED FROM THE GROUP CONSISTING OF POLY(HEXAMETHYLENEADIPAMIDE), POLYCAPROAMIDE, AND POLY(MPHENYLENISOPHTHALAMINE) WHICH CONSISTS ESSENTIALLY OF APPLYING TO SAID POLYMER MATERIAL A FLAME RETARDING AMOUNT OF AT LEAST ONE AMMONIUM SAT OF PHOSOHORIC ACID SELECTED FROM THE GROUP CONSISTING OF MONO AND DIAMMONIUM ACID PHOSPHATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |