US4880681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low heat output composite
Assignee: Heath Tecna Aerospace Co
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Filing: 1988-02-26
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Granted: 1989-11-14
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Expires: 2008-02-26
Abstract
Abstract A fiber composite containing a system of reinforcing fibers that is impregnated with a resin matrix. The resin matrix includes a phenolic-based resin and a phosphorus-containing polymer. The composite exhibits low heat release rate and total heat release when subjected to combustion conditions including a radiant heat source.
Inventors
- 👤 James O. Price
- 👤 Albert J. Stewart
- 👤 Sally A. Hasselbrack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:57
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08K; C08K3/00; C08K3/32; C08K7/00; C08K7/02; C08L; C08L61/00; C08L61/04; C08L61/06; C08J2361/00; C08J2361/04; C08J2361/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
A low heat output composite comprising: (a) reinforcing fibers distributed throughout a resin matrix, said resin matrix comprising; (b) a major amount of phenolic-based resin; and (c) a minor amount of phosphorus-containing polymer, said minor amount effective to cause the low heat output composite to exhibit a total heat release of less than about 65 kilowatt-minute/m 2 when subjected to combustion conditions including a radiant heat source.
Claim 2
Dependent Claim
67 words
A low heat output composite comprising: (a) reinforcing fibers distributed throughout a resin matrix, said resin matrix comprising; (b) a major amount of phenolic-based resin; and (c) a minor amount of phosphorus-containing polymer, said minor amount effective to cause the low heat output composite to exhibit a total heat release of less than about 65 kilowatt-minute/m 2 when subjected to combustion conditions including a radiant heat source.
Claim 3
Dependent Claim
39 words
The low heat output composite of claim 1, wherein the phosphoruscontaining polymer is used in an amount effective to cause the low heat output composite to exhibit a heat release rate of less than about 65 kilowatts/m 2 .
Claim 4
Dependent Claim
20 words
The low heat output composite of claim 1, wherein the phosphorus-containing polymer contains at least about 30 weight percent phosphorus.
Claim 5
Dependent Claim
26 words
The low heat output composite of claim 1, wherein the phosphorus containing polymer is selected from those phosphorus-containing polymers that are dispersible in the phenolic-based resin.
Claim 6
Dependent Claim
15 words
The low heat output composite of claim 4, wherein the phosphorus-containing polymer is ammonium polyphosphate.
Claim 7
Dependent Claim
26 words
The low heat output composite of claim 5, wherein the phenolic-based resin is selected from the group consisting of phenol-formaldehyde resole resins and phenol-formaldehyde novolak resins.
Claim 8
Dependent Claim
45 words
The low heat output composite of claim 6, wherein the resin matrix further comprises the phenolic-based resin in an amount ranging from about 75 pph to about 95 pph and the phosphorus-containing polymer in an amount ranging from about 5 pph to about 25 pph.
Claim 9
Dependent Claim
45 words
The low heat output composite of claim 7, wherein the resin matrix further comprises the phenolic-based resin in an amount ranging from about 82 pph to about 90 pph and the phosphorus-containing polymer in an amount ranging from about 10 pph to about 18 pph.
Claim 10
Dependent Claim
35 words
The low heat output composite of claim 8, wherein the resin matrix further comprises the phenolic-based resin in an amount of about 84 pph and the phosphorus-containing polymer in an amount of about 16 pph.
Claim 11
Dependent Claim
30 words
The low heat output composite of claim 1, wherein the reinforcing fibers are selected from the group consisting of glass fibers, graphite fibers, plastic fibers, aramid fibers and mixtures thereof.
Claim 12
Dependent Claim
29 words
The low heat output composie of claim 1, further comprising about 45 to about 75 weight percent reinforcing fibers and about 25 to about 55 weight percent resin matrix.
Claim 13
Dependent Claim
14 words
The low heat output composite of claim 1, wherein the resin matrix is non-intumescent.
Claim 14
Dependent Claim
23 words
The low heat output composite of claim 1, wherein the heat produced by the radiant heat source is about 3.5 watts/cm 2 .
Claim 15
Dependent Claim
21 words
The low heat output composite of claim 2, wherein the heat release rate is less than about 45 kilowatts/m 2 .
Claim 16
Dependent Claim
21 words
The low heat output composite of claim 14, wherein the total heat release is less than about 45 kilowatt-minute/m 2 .
Claim 17
Dependent Claim
13 words
An airline structural panel comprising the low heat output composite of claim 1.
Claim 18
Dependent Claim
12 words
The airline structural panel of claim 16, further comprising a decorative film.
Claim 19
Dependent Claim
53 words
An improved airline structural panel comprising a lightweight core material and reinforcing fibers distributed throughout a resin matrix, the resin matrix comprising: (a) phenolic-based resin; and (b) phosphorus-containing polymer in an amount effective to cause the airline structural panel to exhibit a total heat release of less than about 65 kilowatt-minute/m 2 .
Claim 20
Dependent Claim
53 words
An improved airline structural panel comprising a lightweight core material and reinforcing fibers distributed throughout a resin matrix, the resin matrix comprising: (a) phenolic-based resin; and (b) phosphorus-containing polymer in an amount effective to cause the airline structural panel to exhibit a total heat release of less than about 65 kilowatt-minute/m 2 .
Claim 21
Dependent Claim
37 words
The airline structural panel of claim 18, wherein the phosphoruscontaining polymer is used in an amount effective to cause the airline structural panel to exhibit a heat release rate of less than about 65 kilowatts/m 2 .
Claim 22
Dependent Claim
14 words
The low heat output composite of claim 1, further comprising a lightweight core material.
Claim 23
Dependent Claim
16 words
The low heat output composite of claim 20, wherein the lightweight core material contains honeycomb cells.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |