US4184969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire- and flame-retardant composition
Assignee: Bhat Industries Inc
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Filing: 1978-08-04
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Granted: 1980-01-22
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Expires: 1998-08-04
Abstract
Abstract An inorganic composition for use as a fire- and flame-retardant additive to cellulose fiber thermal insulation, consisting essentially of 10 to 25 parts by weight of alumina trihydrate, 20 to 35 parts by weight of ammonium sulfate, 20 to 35 parts by weight of borax, 10 to 20 parts by weight of boric acid, up to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash. Loadings of 12% to 18% by weight of the additive, based on the weight of the insulation, provide fire- and flame-retardant characteristics, non-corrosiveness, smoke suppression, and moisture absorption values within the limits prescribed by federal specificatons. The composition is also effective in mold inhibition and vermin control, and has relatively low density.
Inventors
- 👤 Vasanth K. Bhat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:53
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; C; C04; C04B; C04B30/00; C04B30/02; C09; C09K; C09K21/00; C09K21/02; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/45; D06M11/51; D06M11/55; D06M11/80; D06M11/82; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2200/00; D06M2200/30; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
An inorganic composition having excellent fire- and flame-retardant characteristics, low moisture absorption, and substantially no corrosiveness to aluminum, copper, and steel, consisting essentially of 10 to 25 parts by weight of alumina trihydrate, 20 to 35 parts by weight of ammonium sulfate, 20 to 35 parts by weight of borax, 10 to 20 parts by weight of boric acid, up to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash.
Claim 2
Dependent Claim
78 words
An inorganic composition having excellent fire- and flame-retardant characteristics, low moisture absorption, and substantially no corrosiveness to aluminum, copper, and steel, consisting essentially of 10 to 25 parts by weight of alumina trihydrate, 20 to 35 parts by weight of ammonium sulfate, 20 to 35 parts by weight of borax, 10 to 20 parts by weight of boric acid, up to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash.
Claim 3
Dependent Claim
71 words
The composition claimed in claim 1, consisting essentially of about 12 to about 17 parts by weight of alumina trihydrate, about 25 to 35 parts by weight of ammonium sulfate, about 25 to about 33 parts by weight of borax, about 12 to about 18 parts by weight of boric acid, about 5 to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash.
Claim 4
Dependent Claim
70 words
The composition claimed in claim 1 or 2, exhibiting a Flame Spread Rating not greater than 20, a Flame Resistance Permanency not greater than 10%, a Smoke Density not greater than 25, a Corrosiveness rated as non-corrosive, and a Moisture Absorption not greater than 10%, by the herein described tests, after application to cellulose thermal insulation at a loading of about 12% to about 18% by weight of said insulation.
Claim 5
Dependent Claim
27 words
The composition claimed in claim 1, consisting essentially of, in weight percent, 16% alumina trihydrate, 35% ammonium sulfate, 30% borax, 17.5% boric acid, and 1.5% soda ash.
Claim 6
Dependent Claim
24 words
The composition claimed in claim 1, consisting essentially of, in weight percent, 16.7% alumina trihydrate, 33.3% ammonium sulfate, 33.3% borax, and 16.7% boric acid.
Claim 7
Dependent Claim
27 words
The composition claimed in claim 1, consisting essentially of, in weight percent, 12.5% alumina trihydrate, 25% ammonium sulfate, 25% borax, 12.5% boric acid, and 25% nepheline syenite.
Claim 8
Dependent Claim
17 words
The composition claimed in claim 1, wherein said borax is sodium tetraborate pentahydrate or sodium tetraborate decahydrate.
Claim 9
Dependent Claim
19 words
The composition claimed in claim 1, wherein said boric acid is refined or crude boric acid containing sodium sulfate.
Claim 10
Dependent Claim
79 words
Cellulose fiber thermal insulation containing from about 12% to about 18% by weight of said insulation of a fire- and flame-retardant composition consisting essentially of 10 to 25 parts by weight of alumina trihydrate, 20 to 35 parts by weight of ammonium sulfate, 20 to 35 parts by weight of borax, 10 to 20 parts by weight of boric acid, up to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash.
Claim 11
Dependent Claim
79 words
Cellulose fiber thermal insulation containing from about 12% to about 18% by weight of said insulation of a fire- and flame-retardant composition consisting essentially of 10 to 25 parts by weight of alumina trihydrate, 20 to 35 parts by weight of ammonium sulfate, 20 to 35 parts by weight of borax, 10 to 20 parts by weight of boric acid, up to 25 parts by weight of nepheline syenite, and up to 2 parts by weight of soda ash.
Claim 12
Dependent Claim
49 words
The thermal insulation claimed in claim 9, exhibiting a Flame Spread Rating not greater than 20, A Flame Resistance Permanency not greater than 10%, a Smoke Density not greater than 25, a Corrosiveness rating of non-corrosive, and a Moisture Absorption not greater than 10%, by the herein described tests.
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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |