US4130458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product containing alumina trihydrate and a source of B2 O3 and method
Assignee: Masonite Corp
•
Filing: 1977-05-13
•
Granted: 1978-12-19
•
Expires: 1997-05-13
Abstract
Abstract The ASTM E84 flamespread of fibrous products such as hardboard is reduced by incorporation of a combination of alumina trihydrate and a source of B 2 O 3 , such as boric acid. The B 2 O 3 source should be capable of providing B 2 O 3 at a temperature below 400° C.
Inventors
- 👤 Gregory R. Moore
- 👤 Craig A. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
C; C08; C08L; C08L3/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/38; C09; C09K; C09K21/00; C09K21/02; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
66 words
A fibrous product comprising combustible fibers, an alumina hydrate in an amount in the range of 10-60% by weight of said product, and a boron containing compound selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, said borate containing compound being present in said product in an amount of at least 1/2% by weight of said product.
Claim 2
Dependent Claim
66 words
A fibrous product comprising combustible fibers, an alumina hydrate in an amount in the range of 10-60% by weight of said product, and a boron containing compound selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, said borate containing compound being present in said product in an amount of at least 1/2% by weight of said product.
Claim 3
Dependent Claim
15 words
A product as defined in claim 1 wherein the boron containing compound comprises boric acid.
Claim 4
Dependent Claim
16 words
A product as defined in claim 1 wherein the boron containing compound comprises an ammonium borate.
Claim 5
Dependent Claim
14 words
A product as defined in claim 3 wherein the ammonium borate comprises ammonium pentaborate.
Claim 6
Dependent Claim
14 words
A product as defined in claim 3 wherein the ammonium borate comprises ammonium biborate.
Claim 7
Dependent Claim
19 words
A product as defined in claim 1 wherein the boron containing compound comprises 1-10% by weight of said product.
Claim 8
Dependent Claim
29 words
A product as defined in claim 1 wherein the combustible fibers are included in said product in an amount in the range of 20-90% by weight of the product.
Claim 9
Dependent Claim
23 words
A product as defined in claim 1 wherein the borax is included in an amount of about 1-10% by weight of said product.
Claim 10
Dependent Claim
51 words
A product comprising cellulosic fibers, 20-60% by weight alumina trihydrate, and a boron compound selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, said boron compound contained in said product in an amount of at least 1/2% by weight of said product.
Claim 11
Dependent Claim
51 words
A product comprising cellulosic fibers, 20-60% by weight alumina trihydrate, and a boron compound selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, said boron compound contained in said product in an amount of at least 1/2% by weight of said product.
Claim 12
Dependent Claim
14 words
A product as defined in claim 9 wherein the boron compound comprises ammonium pentaborate.
Claim 13
Dependent Claim
14 words
A product as defined in claim 9 wherein the boron compound comprises ammonium biborate.
Claim 14
Independent Claim
143 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, adding to the wet mat alumina trihydrate, and a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 in said fibrous product, and consolidating the fibrous product.
Claim 15
Independent Claim
143 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, adding to the wet mat alumina trihydrate, and a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 in said fibrous product, and consolidating the fibrous product.
Claim 16
Dependent Claim
22 words
A method as defined in claim 12 wherein said source of B 2 O 3 is added to said slurry of components.
Claim 17
Dependent Claim
31 words
A method as defined in claim 12 wherein said source of B 2 O 3 is added to said wet mat when said wet mat contains about 20-60% by weight water.
Claim 18
Dependent Claim
18 words
A method as defined in claim 14 wherein said alumina trihydrate is added to said slurry of components.
Claim 19
Dependent Claim
41 words
A method as defined in claim 14 wherein the source of B 2 O 3 is deposited onto the wet mat in an amount sufficient to provide 1-5% by weight of said B 2 O 3 source in the consolidated product.
Claim 20
Dependent Claim
38 words
A method as defined in claim 12 wherein the source of B 2 O 3 is deposited on the surface of the wet mat in an amount of about 5-8% by weight of solids in the wet mat.
Claim 21
Independent Claim
137 words
A method of forming a fibrous product having a reduced flamespread index comprising: mixing together cellulosic fibers, alumina trihydrate, and a binder, adding a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product, air-laying the mixture onto a support member, and consolidating the mixture with heat and pressure to form a fibrous product having a reduced flamespread index.
Claim 22
Independent Claim
137 words
A method of forming a fibrous product having a reduced flamespread index comprising: mixing together cellulosic fibers, alumina trihydrate, and a binder, adding a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product, air-laying the mixture onto a support member, and consolidating the mixture with heat and pressure to form a fibrous product having a reduced flamespread index.
Claim 23
Dependent Claim
29 words
A method as defined in claim 18 wherein the source of B 2 O 3 is added to the fibers prior to air-laying the mixture onto the support member.
Claim 24
Dependent Claim
26 words
A method as defined in claim 18 wherein the source of B 2 O 3 is impregnated into the fibrous product after consolidation of said product.
Claim 25
Independent Claim
151 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water, alumina trihydrate and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, removing at least a portion of the water from said wet mat, and adding thereto a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is combined in said slurry in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
Claim 26
Independent Claim
151 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water, alumina trihydrate and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, removing at least a portion of the water from said wet mat, and adding thereto a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said alumina trihydrate is combined in said slurry in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product and wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
Claim 27
Independent Claim
173 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, removing a portion of said water from said wet mat to form a partially dried wet mat, adding alumina trihydrate to said partially dried wet mat when said partially dried wet mat contains water in an amount of 20-60% by weight, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product, and adding a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
Claim 28
Independent Claim
173 words
A method of making a fibrous product having a reduced flamespread comprising: mixing together a slurry of components comprising water and combustible fibers, depositing at least a portion of said slurry onto a water pervious support member to form a wet mat, removing a portion of said water from said wet mat to form a partially dried wet mat, adding alumina trihydrate to said partially dried wet mat when said partially dried wet mat contains water in an amount of 20-60% by weight, wherein said alumina trihydrate is added in an amount sufficient to provide 10-60% alumina trihydrate in said fibrous product, and adding a source of B 2 O 3 effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
Claim 29
Dependent Claim
24 words
A method as defined in claim 21 wherein said source of B 2 O 3 is impregnated into said fibrous product after consolidation thereof.
Claim 30
Dependent Claim
24 words
A method as defined in claim 22 wherein said source of B 2 O 3 is impregnated into said fibrous product after consolidation thereof.
Claim 31
Independent Claim
147 words
A method of forming a fibrous product having a reduced flamespread index comprising: mixing together cellulosic fibers, alumina trihydrate, and a binder, said alumina trihydrate added in an amount such that after consolidation of the fibrous product, said product contains alumina trihydrate in an amount of 10-60% by weight of said product, air-laying the mixture onto a support member, consolidating the mixture under heat and pressure to form a fibrous product, and adding a source of B 2 O 3 to said consolidated fibrous product, effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
Claim 32
Independent Claim
147 words
A method of forming a fibrous product having a reduced flamespread index comprising: mixing together cellulosic fibers, alumina trihydrate, and a binder, said alumina trihydrate added in an amount such that after consolidation of the fibrous product, said product contains alumina trihydrate in an amount of 10-60% by weight of said product, air-laying the mixture onto a support member, consolidating the mixture under heat and pressure to form a fibrous product, and adding a source of B 2 O 3 to said consolidated fibrous product, effective in reducing the flamespread of the fibrous product, said source of B 2 O 3 selected from the group consisting of boric acid, mixture of boric acid and borax, and an ammonium borate, wherein said source of B 2 O 3 is added in an amount sufficient to provide at least 1/2% B 2 O 3 source in said fibrous product.
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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |