US4126473A
Expired / Lapsed
US
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Flame retarding compositions for cellulosic boards
Assignee: CIT Group Business Credit Inc
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Filing: 1977-06-20
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Granted: 1978-11-21
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Expires: 1997-06-20
Abstract
Abstract Synergistically performing flame retarding compositions are provided for cellulosic boards, such as hardboards, particleboards and fiberboards. The synergistically performing compositions consist of three components, namely, an aluminous material, a naturally occurring borate-containing mineral and a phosphate or sulfate salt. Incorporation of these compositions in the boards allows consistent production of flame-retarded products with a Class I or better fire rating.
Inventors
- 👤 Igor Sobolev
- 👤 Erwin Panusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:22
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/30; C08K3/32; C08K3/38; C08L; C08L61/00; C08L97/00; C08L97/02; C08L2201/00; C08L2201/02; C08L61/04; C08L61/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
190 words
Flame retardant composition for cellulosic boards consisting essentially (A) a source of AL 2 O 3 .xH 2 O; (B) a naturally occurring calcium-borate mineral; and (C) an inorganic sulfate or phosphate-containing salt, wherein (A) is selected from the group of Al 2 O 3 .xH 2 O, where x is in the range of about 0.5-3.0, bauxite and mixtures thereof; (B) is selected from the group of ulexite, colemanite and mixtures thereof; and (C) is selected from the group of salts having the formulae M m HSO 4 , M m (HPO 4 ) n , M m (H 2 PO 4 ) n , X m H 4-m P 2 O 7 , where M is Na, K, NH 4 , Mg and Al and X is Na, K, Mg and NH 4 and m and n depend on the valency of M, Ca(H 2 PO 4 ) 2 , K 3 PO 4 , Na 3 PO 4 and the metaphosphates of Na and K; and wherein in the flame retardant composition, the percent weight ratios of A:B:C are kept within the range of about 10-90:5-85:5- 40.
Claim 2
Dependent Claim
190 words
Flame retardant composition for cellulosic boards consisting essentially (A) a source of AL 2 O 3 .xH 2 O; (B) a naturally occurring calcium-borate mineral; and (C) an inorganic sulfate or phosphate-containing salt, wherein (A) is selected from the group of Al 2 O 3 .xH 2 O, where x is in the range of about 0.5-3.0, bauxite and mixtures thereof; (B) is selected from the group of ulexite, colemanite and mixtures thereof; and (C) is selected from the group of salts having the formulae M m HSO 4 , M m (HPO 4 ) n , M m (H 2 PO 4 ) n , X m H 4-m P 2 O 7 , where M is Na, K, NH 4 , Mg and Al and X is Na, K, Mg and NH 4 and m and n depend on the valency of M, Ca(H 2 PO 4 ) 2 , K 3 PO 4 , Na 3 PO 4 and the metaphosphates of Na and K; and wherein in the flame retardant composition, the percent weight ratios of A:B:C are kept within the range of about 10-90:5-85:5- 40.
Claim 3
Dependent Claim
21 words
Flame retardant composition of claim 1, wherein the percent weight ratios of A:B:C are kept within the range of about 40-75:20-60:5-30.
Claim 4
Dependent Claim
33 words
Flame retardant composition of claim 1, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is Ca(H 2 PO 4 ) 2 .
Claim 5
Dependent Claim
29 words
Flame retardant composition of claim 1, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is NaHSO 4 .
Claim 6
Dependent Claim
35 words
Flame retardant composition of claim 1, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is Na 2 H 2 P 2 O 7 .
Claim 7
Dependent Claim
48 words
Flame retardant composition of claim 1, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is selected from the group consisting of NH 4 H 2 PO 4 , (NH 4 ) 2 HPO 4 and ammonium polyphosphate.
Claim 8
Dependent Claim
220 words
A flame-retarded cellulosic board containing a flame retardant composition consisting essentially (A) a source of Al 2 O 3 .xH 2 O; (B) a naturally occurring calcium-borate mineral and (C) an inorganic sulfate or phosphate-containing salt, wherein (A) is selected from the group of Al 2 O 3 .xH 2 O, where x is in the range of about 0.5-3.0, bauxite and mixtures thereof; (B) is selected from the group of ulexite, colemanite and mixtures thereof; and (C) is selected from the group of salts having the formulae M m HSO 4 , M m (HPO 4 ) n , M m (H 2 PO 4 ) n , X m H 4-m P 2 O 7 , where M is Na, K, NH 4 , Mg and Al and X is Na, K, Mg or NH 4 and m and n depend on the valency of M, Ca(H 2 PO 4 ) 2 , K 3 PO 4 , Na 3 PO 4 and the metaphosphates of Na and K; and wherein in the flame retardant composition, the percent weight ratios of A:B:C are kept within the range of about 10-90:5-85:5-40; and wherein the quantity of flame retardant composition in the board is kept within the range of about 25 to about 50% by weight of the flame-retarded board.
Claim 9
Dependent Claim
220 words
A flame-retarded cellulosic board containing a flame retardant composition consisting essentially (A) a source of Al 2 O 3 .xH 2 O; (B) a naturally occurring calcium-borate mineral and (C) an inorganic sulfate or phosphate-containing salt, wherein (A) is selected from the group of Al 2 O 3 .xH 2 O, where x is in the range of about 0.5-3.0, bauxite and mixtures thereof; (B) is selected from the group of ulexite, colemanite and mixtures thereof; and (C) is selected from the group of salts having the formulae M m HSO 4 , M m (HPO 4 ) n , M m (H 2 PO 4 ) n , X m H 4-m P 2 O 7 , where M is Na, K, NH 4 , Mg and Al and X is Na, K, Mg or NH 4 and m and n depend on the valency of M, Ca(H 2 PO 4 ) 2 , K 3 PO 4 , Na 3 PO 4 and the metaphosphates of Na and K; and wherein in the flame retardant composition, the percent weight ratios of A:B:C are kept within the range of about 10-90:5-85:5-40; and wherein the quantity of flame retardant composition in the board is kept within the range of about 25 to about 50% by weight of the flame-retarded board.
Claim 10
Dependent Claim
47 words
Board according to claim 7, wherein the percent weight ratios of A:B:C are kept within the range of about 40-75:20-60:5-30 and the quantity of flame retardant composition in the board is kept within the range of about 35 to about 50% by weight of the flame-retarded board.
Claim 11
Dependent Claim
32 words
Board according to claim 7, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is Ca(H 2 PO 4 ) 2 .
Claim 12
Dependent Claim
28 words
Board according to claim 7, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is NaHSO 4 .
Claim 13
Dependent Claim
34 words
Board according to claim 7, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is Na 2 H 2 P 2 O 7 .
Claim 14
Dependent Claim
47 words
Board according to claim 7, wherein A is Al 2 O 3 .3H 2 O or bauxite, B is ulexite or colemanite and C is selected from the group consisting of NH 4 H 2 PO 4 , (NH 4 ) 2 HPO 4 and ammonium polyphosphates.
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |