US4374171A
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US
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Smolder and flame resistant insulation materials, composition and method
Assignee: United States Department of Commerce
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Filing: 1981-10-19
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Granted: 1983-02-15
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Expires: 2001-10-19
Abstract
Abstract A flame and smolder resistant cellulosic insulation material, method of treating loose-fill cellulosic material, and composition for imparting flame and smolder resistance to such materials are disclosed with the combination of from about 2 to 9% sulfur and from about 10 to 25% flame retardant uniformly distributed in the cellulosic insulation material based on the weight of cellulosic material.
Inventors
- 👤 Robert J. McCarter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:04
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/004; C; C08; C08K; C08K3/00; C08K3/01; C08K3/016; C08K3/02; C08K3/06; C09; C09K; C09K21/00; C09K21/02; D06; D06M; D06M11/00; D06M11/51; D06M11/52; D06M11/55; D06M11/56; D06M11/57; D06M11/68; D06M11/70; D06M11/71; D06M11/77; D06M11/79; D06M11/80; D06M11/82; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
56 words
A flame and smolder resistant cellulosic insulation material comprising: a cellulosic fibrous mass of sufficiently low density to provide insulating effects, from about 2% to about 9% elemental sulfur based on the weight of the cellulosic fibrous mass, and from about 10% to about 25% flame retardant based on the weight of the cellulosic fibrous mass.
Claim 2
Dependent Claim
56 words
A flame and smolder resistant cellulosic insulation material comprising: a cellulosic fibrous mass of sufficiently low density to provide insulating effects, from about 2% to about 9% elemental sulfur based on the weight of the cellulosic fibrous mass, and from about 10% to about 25% flame retardant based on the weight of the cellulosic fibrous mass.
Claim 3
Dependent Claim
42 words
The flame and smolder resistant cellulosic insulation material of claim 1 wherein the flame retardant is selected from the group consisting of borax, aluminum sulfate, alumina trihydrate, sodium silicate, sodium monobasic phosphate, calcium sulfate, magnesium sulfate, calcium dibasic phosphate and mixtures thereof.
Claim 4
Dependent Claim
44 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is borax present in an amount of about 12 to about 15% and sulfur is present in an amount of about 7% based on the weight of cellulosic material.
Claim 5
Dependent Claim
35 words
The flame and smolder resistant cellulosic insulation material of claim 3 wherein the borax is of the formula Na 2 B 4 O 7 .5H 2 O and is present in an amount of 12%.
Claim 6
Dependent Claim
35 words
The flame and smolder resistant cellulosic insulation material of claim 3 wherein the borax is of the formula Na 2 B 4 O 7 .10H 2 O and is present in an amount of 15%.
Claim 7
Dependent Claim
42 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is aluminum sulfate present in an amount of about 15% and sulfur is present in an amount of about 2.5% based on the weight of cellulosic material.
Claim 8
Dependent Claim
41 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is calcium sulfate in an amount of about 22% and sulfur is present in an amount of about 4.5% based on the weight of cellulosic material.
Claim 9
Dependent Claim
42 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is alumina trihydrate present in an amount of about 22% and sulfur is present in an amount of about 3% based on the weight of cellulosic material.
Claim 10
Dependent Claim
44 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is sodium phosphate monobasic monohydrate present in an amount of about 17% and sulfur is present in an amount of about 4% based on the weight of cellulosic material.
Claim 11
Dependent Claim
48 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is sodium silicate present in an amount of about 18 to about 21% and sulfur is present in an amount of about 7.5 to about 8% based on the weight of cellulosic material.
Claim 12
Dependent Claim
42 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is magnesium sulfate present in an amount of about 21% and sulfur is present in an amount of about 3.5% based on the weight of cellulosic material.
Claim 13
Dependent Claim
43 words
The flame and smolder resistant cellulosic insulation material of claim 2 wherein the flame retardant is calcium dibasic phosphate present in an amount of about 20% and sulfur is present in an amount of about 3.5% based on the weight of cellulosic material.
Claim 14
Independent Claim
62 words
A method of inhibiting the smolder tendency of cellulosic insulating materials comprising: treating the insulation material with elemental sulfur in an amount between about 2% and about 9% based on the weight of the insulation material, and treating the insulation material with a flame retardant in an amount between about 10% and about 25% based on the weight of the insulation material.
Claim 15
Independent Claim
62 words
A method of inhibiting the smolder tendency of cellulosic insulating materials comprising: treating the insulation material with elemental sulfur in an amount between about 2% and about 9% based on the weight of the insulation material, and treating the insulation material with a flame retardant in an amount between about 10% and about 25% based on the weight of the insulation material.
Claim 16
Dependent Claim
27 words
The method of claim 13 wherein said treating steps are conducted during the milling of a cellulosic material into a condition suitable for use as insulation material.
Claim 17
Dependent Claim
18 words
The methods of claim 14 wherein the sulfur treating step and flame retardant treating step are conducted simultaneously.
Claim 18
Dependent Claim
35 words
The method of claim 13 wherein said flame retardant is selected from the group consisting of borax, aluminum sulfate, alumina trihydrate, sodium silicate, sodium phosphate, calcium sulfate, magnesium sulfate, calcium dibasic phosphate and mixtures thereof.
Claim 19
Dependent Claim
38 words
The method of claim 16 wherein the flame retardant is borax present in an amount of about 12 to about 15% and sulfur is present in an amount of about 7% based on the weight of cellulosic material.
Claim 20
Dependent Claim
29 words
The method of claim 16 wherein the borax is of the formula Na 2 B 4 O 7 .5H 2 O and is present in an amount of 12%.
Claim 21
Dependent Claim
29 words
The method of claim 16 wherein the borax is of the formula Na 2 B 4 O 7 .10H 2 O and is present in an amount of 15%.
Claim 22
Dependent Claim
36 words
The method of claim 16 wherein the flame retardant is aluminum sulfate present in an amount of about 15% and sulfur is present in an amount of about 2.5% based on the weight of cellulosic material.
Claim 23
Dependent Claim
35 words
The method of claim 16 wherein the flame retardant is calcium sulfate in an amount of about 22% and sulfur is present in an amount of about 4.5% based on the weight of cellulosic material.
Claim 24
Dependent Claim
35 words
The method of claim 16 wherein the flame retardant is alumina trihydrate present in an amount of 22% and sulfur is present in an amount of about 3% based on the weight of cellulosic material.
Claim 25
Dependent Claim
38 words
The method of claim 16 wherein the flame retardant is sodium phosphate monobasic monohydrate present in an amount of about 17% and sulfur is present in an amount of about 4% based on the weight of cellulosic material.
Claim 26
Dependent Claim
42 words
The method of claim 16 wherein the flame retardant is sodium silicate present in an amount of about 18% to about 21% and sulfur is present in an amount of about 7.5 to about 8% based on the weight of cellulosic material.
Claim 27
Dependent Claim
36 words
The method of claim 16 wherein the flame retardant is magnesium sulfate present in an amount of about 21% and sulfur is present in an amount of about 3.5% based on the weight of cellulosic material.
Claim 28
Dependent Claim
37 words
The method of claim 16 wherein the flame retardant is calcium dibasic phosphate present in an amount of about 20% and sulfur is present in an amount of about 3.5% based on the weight of cellulosic material.
Claim 29
Dependent Claim
70 words
A composition for the flame retarding and smolder inhibiting treatment of cellulosic insulation materials consisting essentially of a flame retardant compound selected from the group consisting of borax, aluminum sulfate, aluminum trihydrate, sodium silicate, sodium phosphate, calcium sulfate, magnesium sulfate, calcium dibasic phosphate and mixtures thereof and elemental sulfur in an amount of from about 15% to about 50% by weight based on the weight of the flame retardant compound.
Claim 30
Dependent Claim
70 words
A composition for the flame retarding and smolder inhibiting treatment of cellulosic insulation materials consisting essentially of a flame retardant compound selected from the group consisting of borax, aluminum sulfate, aluminum trihydrate, sodium silicate, sodium phosphate, calcium sulfate, magnesium sulfate, calcium dibasic phosphate and mixtures thereof and elemental sulfur in an amount of from about 15% to about 50% by weight based on the weight of the flame retardant compound.
Claim 31
Dependent Claim
11 words
The composition of claim 27 wherein the flame retardant is borax.
Claim 32
Dependent Claim
12 words
The composition of claim 27 wherein the flame retardant is aluminum sulfate.
Claim 33
Dependent Claim
12 words
The composition of claim 27 wherein the flame retardant is calcium sulfate.
Claim 34
Dependent Claim
12 words
The composition of claim 27 wherein the flame retardant is alumina trihydrate.
Claim 35
Dependent Claim
14 words
The composition of claim 27 wherein the flame retardant is sodium phosphate monobasic monohydrate.
Claim 36
Dependent Claim
12 words
The composition of claim 27 wherein the flame retardant is sodium silicate.
Claim 37
Dependent Claim
12 words
The composition of claim 27 wherein the flame retardant is magnesium sulfate.
Claim 38
Dependent Claim
13 words
The composition of claim 27 wherein the flame retardant is calcium dibasic phosphate.
References Cited (Backward Citations)
US2867549A
Cited
US3027326A
Cited
US3576590A
Cited
US3912792A
Cited
US4012507A
Cited
US4038451A
Cited
US4079158A
Cited
US4302345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |