US4539045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-blooming fire retardants for wood substrates
Assignee: Occidental Chemical Corp
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Filing: 1983-12-16
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Granted: 1985-09-03
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Expires: 2003-12-16
Abstract
Abstract Non-blooming fire retardant compositions are disclosed comprising an ammonium phosphate-containing fire retardant and an effective amount of boric acid or an alkali metal borate. The ammonium phosphate-containing fire retardant preferably comprises the reaction mixture of aqueous phosphoric acid and an alkylene oxide. Preferably, the boric acid or alkali metal borate is present in an amount of from about 2.5% to about 12% by weight of solids in the phosphate-containing fire retardant. Such compositions are less susceptible to exudation of the fire retardant from treated wood panels during drying of the panels at elevated temperatures, and are particularly suitable for use in continuous treatment processes.
Inventors
- 👤 George M. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:54
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/16; B27K3/32; B27K3/52; C; C09; C09K; C09K21/00; C09K21/02; C09K21/04; B27K2240/00; B27K2240/30; B27K3/163; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
A non-blooming fire retardant composition for celulosic material consisting essentially of (1) a reaction mixture formed from aqueous phosphoric acid and an alkylene oxide of 2 to 4 carbon atoms, the weight ratio of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio being based upon the weight of 100 percent phosphoric acid or equivalent thereof, and (2) from about 2.5% to about 12% by weight of boric acid on a solids basis.
Claim 2
Dependent Claim
79 words
A non-blooming fire retardant composition for celulosic material consisting essentially of (1) a reaction mixture formed from aqueous phosphoric acid and an alkylene oxide of 2 to 4 carbon atoms, the weight ratio of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio being based upon the weight of 100 percent phosphoric acid or equivalent thereof, and (2) from about 2.5% to about 12% by weight of boric acid on a solids basis.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the cellulosic material is a ligno cellulosic material.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the ligno cellulosic material is wood.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the phosphoric acid is orthophosphoric acid.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein the alkylene oxide is propylene oxide.
Claim 7
Dependent Claim
27 words
The composition of claim 1 wherein the boric acid is present in an amount of from about 5% to about 7.5% by weight on a solids basis.
Claim 8
Dependent Claim
81 words
A non-blooming fire retardant composition for cellulosic material consisting essentially of (1) a reaction mixture formed from aqueous phosphoric acid and an alkylene oxide of 2 to 4 carbon atoms, the weight ration of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio being based upon the weight of 100 percent phosphoric acid or equivalent thereof, and (2) from about 2.5% to about 12% by weight of an alkali metal borate on a solids basis.
Claim 9
Dependent Claim
81 words
A non-blooming fire retardant composition for cellulosic material consisting essentially of (1) a reaction mixture formed from aqueous phosphoric acid and an alkylene oxide of 2 to 4 carbon atoms, the weight ration of oxide to acid being within the range of about 0.01:1 to about 0.25:1, such ratio being based upon the weight of 100 percent phosphoric acid or equivalent thereof, and (2) from about 2.5% to about 12% by weight of an alkali metal borate on a solids basis.
Claim 10
Dependent Claim
14 words
The composition of claim 7 wherein the cellulosic material is a ligno celulosic material.
Claim 11
Dependent Claim
12 words
The composition of claim 8 wherein the ligno cellulosic material is wood.
Claim 12
Dependent Claim
12 words
The composition of claim 7 wherein the phophoric acid is orthophosphoric acid.
Claim 13
Dependent Claim
12 words
The composition of claim 10 wherein the alkylene oxide is propylene oxide.
Claim 14
Dependent Claim
13 words
The composition of claim 7 wherein the alkali metal borate is sodium borate.
Claim 15
Dependent Claim
28 words
The composition of claim 7 wherein the alkali metal borate is present in an amount of from about 5% to about 7.5% by weight on a solids basis.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |