US4818603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal-acoustic insulation composite panel
Assignee: Ethyl Corp
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Filing: 1987-11-12
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Granted: 1989-04-04
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Expires: 2007-11-12
Abstract
Abstract A fire resistant thermal and acoustic composite insulating panel comprising at least one polyimide foam insert having a polyorganophosphazene septum adhered to at least one surface. The polyorganophosphazene is filled with about 50-500 parts, preferably 100-500 parts by weight of a heavy metal compound per 100 parts of polyorganophosphazene.
Inventors
- 👤 Warren B. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; B32B5/00; B32B5/18; B32B27/06; B32B27/065; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/165; B32B2307/00; B32B2307/10; B32B2307/102; B32B2307/30; B32B2307/306; B32B2307/3065; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249982; Y10T428/249987; Y10T428/249991; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
55 words
A composite panel having utility as a fire-resistant thermal and acoustic insulating material said panel comprising at least one septum bonded to a surface of at least one foamed polyimide insert, said septum comprising a polyorganophosphazene composition containing about 50-500 parts by weight of a heavy metal compound per 100 parts by weight of polyorganophosphazene.
Claim 2
Dependent Claim
55 words
A composite panel having utility as a fire-resistant thermal and acoustic insulating material said panel comprising at least one septum bonded to a surface of at least one foamed polyimide insert, said septum comprising a polyorganophosphazene composition containing about 50-500 parts by weight of a heavy metal compound per 100 parts by weight of polyorganophosphazene.
Claim 3
Dependent Claim
28 words
A composite panel of claim 1 wherein said septum contains about 100-500 parts by weight of a heavy metal compound per 100 parts by weight of said polyorganophosphazene.
Claim 4
Dependent Claim
15 words
A composite panel of claim 2 wherein said heavy metal compound is a barium compound.
Claim 5
Dependent Claim
13 words
A composite panel of claim 3 wherein said barium compound is barium sulfate.
Claim 6
Dependent Claim
12 words
A composite panel of claim 1 wherein said polyorganophosphazene is a polyaryloxyphosphazene.
Claim 7
Dependent Claim
20 words
A composite panel of claim 5 wherein the aryloxy groups bonded to phosphorus comprise both phenoxy and lower-alkyl phenoxy groups.
Claim 8
Dependent Claim
13 words
A composite panel of claim 6 wherein said lower alkyl phenoxy is p-ethylphenoxy.
Claim 9
Dependent Claim
30 words
A composite panel of claim 5 wherein said polyimide is the condensation product of (a) benzophenone tetracarboxcylic acid, acid anhydride or acid ester and (b) an aromatic or aliphatic diamine.
Claim 10
Dependent Claim
11 words
A composite panel of claim 8 wherein said diamine is 4,4'-methylenebisaniline.
Claim 11
Dependent Claim
28 words
A composite panel of claim 6 wherein said polyimide is the condensation product of (a) benzophenone tetracarboxcyclic acid, acid anhydride or acid ester and (b) an aromatic diamine.
Claim 12
Dependent Claim
60 words
A composite panel of claim 10 wherein said polyaryloxyphosphazene is cured and wherein about 20-79 mole percent of the substituents bonded to phosphorus are phenoxy groups and about 20-79 mole percent of the substituents bonded to phosphorus are p-ethylphenoxy groups and at least one mole percent of the substituents bonded to phosphorus are cross-linking groups derived from olefinically unsaturated substituents.
Claim 13
Dependent Claim
20 words
A composite panel of claim 1 comprising said septum bonded to and sandwiched between two of said foamed polyimide inserts.
Claim 14
Dependent Claim
27 words
A composite panel of claim 12 wherein said septum contains 100-500 parts by weight of a heavy metal compound per 100 parts by weight of said polyorganophosphazene.
Claim 15
Dependent Claim
15 words
A composite panel of claim 13 wherein said heavy metal compound is a barium compound.
Claim 16
Dependent Claim
13 words
A composite panel of claim 14 wherein said barium compound is barium sulfate.
Claim 17
Dependent Claim
14 words
A composite panel of claim 12 wherein said polyorgano phosphazene is a polyaryloxy phosphazene.
Claim 18
Dependent Claim
20 words
A composite panel of claim 16 wherein the aryloxy groups bonded to phosphorus comprise both phenoxy and lower-alkyl phenoxy groups.
Claim 19
Dependent Claim
38 words
A composite panel of claim 17 wherein said polyaryloxyphosphazene is cured and wherein the groups bonded to phosphorus include at least one mole percent up to about 15 mole percent of cross-linking groups derived from olefinically unsaturated substituents.
Claim 20
Dependent Claim
13 words
A composite panel of claim 18 wherein said olefinically unsaturated substituents are ortho-allylphenoxy.
Claim 21
Dependent Claim
27 words
A fire resistant acoustic barrier comprising a sheet of cured polyorganophosphazene containing 100-500 parts by weight of a heavy metal compound for each 100 parts of polyorganophosphazene.
Claim 22
Dependent Claim
27 words
A fire resistant acoustic barrier comprising a sheet of cured polyorganophosphazene containing 100-500 parts by weight of a heavy metal compound for each 100 parts of polyorganophosphazene.
Claim 23
Dependent Claim
12 words
An acoustic barrier of claim 20 wherein said polyorganophosphazene is a polyaryloxyphosphazene.
Claim 24
Dependent Claim
12 words
An acoustic barrier of claim 21 wherein said heavy metal is barium.
Claim 25
Dependent Claim
38 words
An acoustic barrier of claim 22 wherein the aryloxy substituents bonded to phosphorus are phenoxy, p-ethyl phenoxy and optionally up to about 15 mole percent of cross-linking groups derived from orthoallylphenoy and said barium compound is barium sulfate.
Claim 26
Dependent Claim
19 words
An acoustic barrier of claim 23 containing 200-400 parts by weight barium sulfate per 100 parts by weight polyaryloxyphosphazene.
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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |