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US4383858A
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Fire retarding organophosphate compositions
Assignee: Occidental Chemical Corp
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Filing: 1982-01-20
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Granted: 1983-05-17
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Expires: 2002-01-20
Abstract
Abstract A fire retarding composition is disclosed which is made from a reaction mixture of aqueous phosphoric acid and an alkylene oxide, wherein the weight ratio of oxide to acid reactants is within the range of about 0.01:1 to about 0.25:1. The composition produces improved fire retardancy when used to treat cellulosic material.
Inventors
- 👤 George M. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/06; C09K21/12; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/49; C08K5/51; C09D; C09D5/00; C09D5/18; B; B27; B27K; B27K2200/00; B27K2200/10; B27K2240/00; B27K2240/30; B27K3/00; B27K3/52; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
57 words
A fire retarding composition for cellulosic material, comprising: a reation mixture formed from aqueous phosphoric acid; and an alkylene oxide of 2 to 4 carbons, the weight ratio of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio based upon the weight of 100 percent phosphoric acid or equivalent thereof present.
Claim 2
Dependent Claim
57 words
A fire retarding composition for cellulosic material, comprising: a reation mixture formed from aqueous phosphoric acid; and an alkylene oxide of 2 to 4 carbons, the weight ratio of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio based upon the weight of 100 percent phosphoric acid or equivalent thereof present.
Claim 3
Dependent Claim
13 words
A composition according to claim 1, wherein the cellulosic material is ligno-cellulosic material.
Claim 4
Dependent Claim
28 words
A composition according to claim 1 or 2, wherein the aqueous phosphoric acid is from about 1 to about 85 weight percent ortho, pyro, meta or hypophosphoric acid.
Claim 5
Dependent Claim
70 words
A composition according to claim 1, wherein the reaction mixture contains a glycol selected from an alkanediol of 2 to 4 carbons, a bis(hydroxyalkyl) ether having 2 to 4 carbons in each hydroxyalkyl group, or a bis(hydroxyalkoxy) alkane having 2 to 4 carbons in each hydroxyalkoxy group and in the alkane group, provided that the hydroxyalkyl, hydroxyalkoxy and alkane groups have the same number of carbons as the alkylene oxide.
Claim 6
Dependent Claim
18 words
A composition according to claim 1, wherein the alkylene oxide is propylene oxide, butylene oxide or ethylene oxide.
Claim 7
Dependent Claim
18 words
A composition according to claim 1, formed from about 35 to about 85 weight percent aqueous phosphoric acid.
Claim 8
Dependent Claim
13 words
A composition according to claim 5, wherein the alkylene oxide is propylene oxide.
Claim 9
Dependent Claim
16 words
A composition according to claim 6 wherein the alkylene oxide is propylene oxide or butylene oxide.
Claim 10
Dependent Claim
19 words
A composition according to claim 1, which further comprises the reaction mixture neutralized with ammonia or an alkaline material.
Claim 11
Dependent Claim
24 words
A fire resistant cellulosic product, which comprises: an effective amount of the fire retarding composition according to claim 1 in combination with ligno-cellulosic material.
Claim 12
Dependent Claim
21 words
A cellulosic product according to claim 10, wherein the ligno-cellulosic material is wood, plywood, composite wood, or a wooden fiber substance.
Claim 13
Dependent Claim
18 words
A fire resistant cellulosic product according to claim 11, wherein the material is wood, plywood or composite wood.
Claim 14
Dependent Claim
36 words
A cellulosic product according to claim 11 or 12, wherein an amount of composition has been applied to the surface of the cellulosic material which delivers at least about 8 gms. of phosphorous per square meter.
Claim 15
Dependent Claim
22 words
A product according to claim 10, 11 or 12 wherein the composition is formed from ethylene oxide, butylene oxide or propylene oxide.
Claim 16
Dependent Claim
25 words
A product according to claim 10, 11 or 12 wherein the composition is formed from about 35 to about 85 weight percent aqueous phosphoric acid.
Claim 17
Dependent Claim
24 words
A product according to claim 10, 11 or 12, wherein the composition is neutralized with ammonia before it is combined with the cellulosic material.
Claim 18
Dependent Claim
29 words
A composition in accord with claim 1, 2, 4, 5, 6, 7, 8 or 9 wherein the ratio of oxide to acid is from about 0.05:1 to about 0.25:1.
Claim 19
Dependent Claim
29 words
A composition in accord with claim 1, 2, 4, 5, 6, 7, 8 or 9 wherein the ratio of oxide to acid is from about 0.1:1 to about 0.25:1.
Claim 20
Dependent Claim
25 words
A fire resistant cellulosic product of claim 10, 11 or 12 wherein the ratio of oxide to acid is from about 0.05:1 to about 0.25:1.
Claim 21
Dependent Claim
25 words
A fire resistant cellulosic product of claim 10, 11 or 12 wherein the ratio of oxide to acid is from about 0.1:1 to about 0.25:1.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |