US3900327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant cellulosic materials
Assignee: Occidental Chemical Corp
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Filing: 1973-10-12
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Granted: 1975-08-19
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Expires: 1993-10-12
Abstract
Abstract Cellulosic materials such as paper, wood, cotton, rayon and the like are rendered flame retardant by the intimate association therewith of an effective flame retardant amount of a reaction product of aqueous solution of phosphoric acid or an acid ammonium phosphate and an alkylene oxide e.g., ethylene oxide. Amounts of said reaction product of at least, and preferably in excess of, 0.5 percent by weight are generally effective to render the cellulosic material flame retardant. Preferably the reaction product is rendered neutral before or after application to the cellulosic material in order that the material be rendered non-corrosive and non-irritating in nature.
Inventors
- 👤 George T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2639; C08L; C08L71/00; C08L71/02; C09; C09K; C09K21/00; C09K21/06; C09K21/12; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; D06M13/00; D06M13/10; D06M13/144; D06M13/148; D06M13/244; D06M13/282; D06M13/292; D21H17/00; D21H17/71; D21H17/74; D21H5/00; D21H5/0002
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
FIRE RETARDANT CELLULOSIC CONTAINING MATERIAL WHICH MATERIAL CONTAINS AN EFFECTIVE FIRE RETARDANT AMOUNT OF A REACTION PRODUCT OF AQUEOUS ORTHO PHOSPHORIC ACID OR AN ACID AMMONIUM SALT THEREOF AND AN ALKYLENE OXIDE WHEREIN SAID REACTION PRODUCT HAS BEEN OBTAINED BY REACTING AN AQUEOUS SOLUTION OF A ORTHO PHOSPHORIC ACID OR AN ACID AMMONIUM SALT THEREOF CONTAINING FROM ABOUT 1 TO ABOUT 85 PERCENT BY WEIGHT OF ORTHO PHOSPHORIC ACID OR THE EQUIVALENT AMOUNT OF AN ACID AMMONIUM SALT THEREOF WITH AN AMOUNT OF AN ALKYLENE OXIDE WHICH IS FROM ABOUT 0.5 TO 1.5 TIMES THE WEIGHT OF 100 PERCENT PHOSPHORIC ACID OR EQUIVALENT THEREOF PRESENT, INTIMATELY ASSOCIATED THEREWITH.
Claim 2
Dependent Claim
108 words
FIRE RETARDANT CELLULOSIC CONTAINING MATERIAL WHICH MATERIAL CONTAINS AN EFFECTIVE FIRE RETARDANT AMOUNT OF A REACTION PRODUCT OF AQUEOUS ORTHO PHOSPHORIC ACID OR AN ACID AMMONIUM SALT THEREOF AND AN ALKYLENE OXIDE WHEREIN SAID REACTION PRODUCT HAS BEEN OBTAINED BY REACTING AN AQUEOUS SOLUTION OF A ORTHO PHOSPHORIC ACID OR AN ACID AMMONIUM SALT THEREOF CONTAINING FROM ABOUT 1 TO ABOUT 85 PERCENT BY WEIGHT OF ORTHO PHOSPHORIC ACID OR THE EQUIVALENT AMOUNT OF AN ACID AMMONIUM SALT THEREOF WITH AN AMOUNT OF AN ALKYLENE OXIDE WHICH IS FROM ABOUT 0.5 TO 1.5 TIMES THE WEIGHT OF 100 PERCENT PHOSPHORIC ACID OR EQUIVALENT THEREOF PRESENT, INTIMATELY ASSOCIATED THEREWITH.
Claim 3
Dependent Claim
14 words
Fire retardant cellulosic material as claimed in claim 1 wherein the material is paper.
Claim 4
Dependent Claim
14 words
Fire retardant cellulosic material as claimed in claim 1 wherein the material is cotton.
Claim 5
Dependent Claim
31 words
Fire retardant cellulosic material as claimed in claim 1 wherein the material comprises at least 0.5 percent by weight of the reaction product of aqueous phosphoric acid and an alkylene oxide.
Claim 6
Dependent Claim
16 words
Fire retardant cellulosic materials as claimed in claim 1 wherein the alkylene oxide is ethylene oxide.
Claim 7
Dependent Claim
26 words
The fire retardant material of claim 1 wherein the aqueous phosphoric acid solution contains from about 7 to about 25 percent by weight of phosphoric acid.
Claim 8
Dependent Claim
28 words
The fire retardant material of claim 1 wherein the solution of the reaction producT contains from about 7 to about 11 percent by weight of the reaction product.
Claim 9
Dependent Claim
30 words
Flame retardant cellulosic material as claimed in claim 4 wherein said reaction product has been neutralized with an alkaline reacting substance of the group consisting of ammonia and organic amines.
Claim 10
Dependent Claim
16 words
Fire retardant cellulose materials as claimed in claim 4 wherein the alkylene oxide is ethylene oxide.
Claim 11
Dependent Claim
14 words
Fire retardant cellulosic materials as claimed in claim 4 wherein said material is paper.
Claim 12
Dependent Claim
14 words
Fire retardant cellulosic materials as claimed in claim 4 wherein said material is cotton.
Claim 13
Dependent Claim
34 words
The fire retardant material of claim 5 wherein sufficient ethylene oxide is reacted with the phosphoric acid to yield a solution containing from about 4 to about 15% by weight of the reaction product.
Claim 14
Dependent Claim
17 words
The fire retardant material of claim 8 wherein the aqueous reaction product is rendered neutral with ammonia.
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 |