Patent US4307148A successfully refreshed from Google Patents.
US4307148A
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US
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Flame retardant with improved durability comprising an alkali metal polyantimonate and cellulosic materials treated therewith in the absence of chlorine
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1979-08-20
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Granted: 1981-12-22
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Expires: 1999-08-20
Abstract
Abstract A process for improving the flame-retardant properties of cellulose containing fibrous materials in the absence of halogen compounds which comprises treating said fibrous materials with an effective amount of a colloidal aqueous dispersion of an alkali metal polyantimonate containing a mole ratio of alkali metal to antimony in the dispersion of at least about 0.3:1, and drying said materials is described.
Inventors
- 👤 Destin A. Leblanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:28
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/47; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31895; Y10T428/31906; Y10T428/31942; Y10T428/31949; Y10T428/31953; Y10T428/31964; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2656
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
58 words
A process for improving the flame-retardant properties of cellulose-containing fibrous materials in the absence of halogen compounds which comprises treating said fibrous materials with an effective amount of a colloidal aqueous dispersion of an alkali metal polyantimonates containing a mole ratio of alkali metal to antimony in the dispersion of at least about 0.3:1, and drying said materials.
Claim 2
Dependent Claim
58 words
A process for improving the flame-retardant properties of cellulose-containing fibrous materials in the absence of halogen compounds which comprises treating said fibrous materials with an effective amount of a colloidal aqueous dispersion of an alkali metal polyantimonates containing a mole ratio of alkali metal to antimony in the dispersion of at least about 0.3:1, and drying said materials.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the mole ratio of alkali metal to antimony is at least about 0.45:1.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the alkali metal is sodium or potassium.
Claim 5
Dependent Claim
27 words
The process of claim 2 wherein the amount of the dispersion remaining on the fibrous material after drying provides an antimony add-on of about 4 to 10%.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein the aqueous dispersion is prepared by adding an alkali metal base to an aqueous solution of antimonic acid prior to or during polymerization to polyantimonic acid.
Claim 7
Dependent Claim
29 words
The process of claim 5 wherein the aqueous solution of antimonic acid is prepared by passing an aqueous slurry of a water-insoluble metal antimonate through a cation exchange resin.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein the fibrous material comprises at least some cotton.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein an organic polymeric binder is applied to the fibrous material after drying.
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein the aqueous dispersion also contains an organic polymeric binder.
Claim 11
Dependent Claim
12 words
The process of claim 9 wherein the binder is an acrylic resin.
Claim 12
Dependent Claim
20 words
The process of claim 9 wherein the dispersion contains from 0.5 to about 5% by weight of the polymeric binder.
Claim 13
Dependent Claim
20 words
The process of any one of claims 1-11 wherein the dispersion also contains an effective amount of an afterglow suppressant.
Claim 14
Dependent Claim
71 words
A process for improving the flame-retardant properties of cellulose-containing fibrous materials in the absence of halogen compounds which comprises (a) impregnating said materials with an effective amount of a colloidal aqueous dispersion of an alkali metal polyantimonate and from about 0.5 to 5% by weight of an organic polymeric binder, the mole ratio of alkali metal to antimony in the dispersion being at least 0.45:1, and (b) drying said impregnated material.
Claim 15
Dependent Claim
71 words
A process for improving the flame-retardant properties of cellulose-containing fibrous materials in the absence of halogen compounds which comprises (a) impregnating said materials with an effective amount of a colloidal aqueous dispersion of an alkali metal polyantimonate and from about 0.5 to 5% by weight of an organic polymeric binder, the mole ratio of alkali metal to antimony in the dispersion being at least 0.45:1, and (b) drying said impregnated material.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein the alkali metal is sodium or potassium.
Claim 17
Dependent Claim
38 words
The process of claim 13 wherein the aqueous dispersion is prepared by mixing an alkali metal hydroxide with an aqueous solution of antimonic acid prior to or during polymerization to polyantimonic acid and thereafter adding the polymeric binder.
Claim 18
Dependent Claim
28 words
The process of claim 15 wherein the solution of antimonic acid is prepared by passing an aqueous slurry of a water-soluble metal antimonate through a cation exchange resin.
Claim 19
Dependent Claim
29 words
Flame retardant cellulose-containing fibrous materials treated with a colloidal aqueous dispersion of an alkali metal polyantimonate containing a mole ratio of alkali metal to antimony of at least 0.3:1.
Claim 20
Dependent Claim
29 words
Flame retardant cellulose-containing fibrous materials treated with a colloidal aqueous dispersion of an alkali metal polyantimonate containing a mole ratio of alkali metal to antimony of at least 0.3:1.
Claim 21
Dependent Claim
22 words
The fibrous material of claim 17 wherein the dispersion also contains up to about 5% by weight of an organic polymeric binder.
Claim 22
Dependent Claim
24 words
The fibrous material of any one of claims 16 or 17 wherein the dispersion also contains from about 1 to 6% of zinc borate.
Claim 23
Dependent Claim
32 words
The fibrous material of claim 17 wherein the dispersion is prepared by adding an alkali metal base to an aqueous solution of antimonic acid prior to or during polymerization to polyantimonic acid.
Claim 24
Dependent Claim
30 words
The fibrous material of claim 20 wherein the aqueous solution of antimonic acid is prepared by passing an aqueous slurry of a water-insoluble metal antimonate through a cation exchange resin.
Claim 25
Dependent Claim
31 words
The fibrous material of claim 17 wherein the alkali metal is sodium or potassium, and the mole ratio of sodium or potassium to antimony is from about 0.45:1 to about 0.6:1.
References Cited (Backward Citations)
GB573471A
Cited
GB579328A
Cited
US2805176A
Cited
US3892667A
Cited
US3860523A
Cited
US3900666A
Cited
US4110247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |