US4100322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-resin-carbon composites and method of fabrication
Assignee: McDonnell Douglas Corp
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Filing: 1974-12-11
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Granted: 1978-07-11
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Expires: 1994-12-11
Abstract
Abstract Production of composites having increased strength, particularly at elevated temperature, heat resistance and ablative properties, while maintaining low weight, by a process which comprises impregnating fibrous reinforcement, such as a woven fabric of graphite yarns, with a resin, e.g., a phenolic resin, curing the resin to yield a fiber-resin composite, pyrolyzing such composite to convert the resin to a porous carbonaceous matrix, reimpregnating the porous fiber-carbon composite with additional resin, such as a phenolic resin, to fill the pores of the matrix, and curing the reimpregnating resin. The resulting fiber reinforcement-resin matrix-carbon matrix (i.e., bimatrix) composites are particularly useful and valuable as reinforced plastic aerospace components requiring strength at high temperatures and having improved ablative properties.
Inventors
- 👤 Robert W. Seibold
- 👤 Haig S. Parechanian
- 👤 William T. Weatherill
- 👤 Robert E. Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:48
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/24; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/28; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; B29K; B29K2307/00; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/30; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2926; Y10T442/2984
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A plastic composite having improved elevated temperature strength and good thermal insulation properties, which comprises throughout said composite a mixture of carbon and resin matrices, and fibrous reinforcement, forming a bimatrix fibrous reinforcement-carbon-resin solid composite, said carbon of said bimatrix fibrous reinforcement-carbon-resin composite being mechanically locked and adhered to said fibrous reinforcement.
Claim 2
Dependent Claim
52 words
A plastic composite having improved elevated temperature strength and good thermal insulation properties, which comprises throughout said composite a mixture of carbon and resin matrices, and fibrous reinforcement, forming a bimatrix fibrous reinforcement-carbon-resin solid composite, said carbon of said bimatrix fibrous reinforcement-carbon-resin composite being mechanically locked and adhered to said fibrous reinforcement.
Claim 3
Dependent Claim
54 words
The composite as defined in claim 1, said resin matrix selected from the group consisting of cured phenolic, coal tar pitch, polyphenylene, heterocyclic, epoxy, silicone, melamine, alkyd, polyester and polyimide resins, said fibrous reinforcement comprised of fibers of a substance selected from the group consisting of carbon, graphite, glass, silica, quartz, asbestos and boron.
Claim 4
Dependent Claim
19 words
The composite as defined in claim 2, said fibrous reinforcement being a three-dimensional woven fabric comprised of said fibers.
Claim 5
Dependent Claim
22 words
The composite as defined in claim 2, said resin matrix being a phenolic resin and said fibers being graphite or carbon fibers.
Claim 6
Dependent Claim
19 words
The composite as defined in claim 4, said fibrous reinforcement being a three-dimensional woven fabric comprised of said fibers.
Claim 7
Dependent Claim
34 words
The composite as defined in claim 1, said fibrous reinforcement-carbon-resin composite comprising about 35 to about 60% reinforcement fibers, about 20 to about 45% carbon and about 20 to about 45% resin, by weight.
Claim 8
Dependent Claim
33 words
The composite as defined in claim 4, said fibrous reinforcement-carbon-resin composite comprising about 35 to 60% reinforcement fibers, about 20 to about 45% carbon and about 20 to about 45% resin, by weight.
Claim 9
Dependent Claim
34 words
The composite as defined in claim 5, said fibrous reinforcement-carbon-resin composite comprising about 35 to about 60% reinforcement fibers, about 20 to about 45% carbon and about 20 to about 45% resin, by weight.
Claim 10
Dependent Claim
33 words
The composite as defined in claim 2, said fibrous reinforcement-carbon-resin composite comprising about 35 to about 50% fibers, about 25 to about 40% resin and about 25 to about 40% carbon, by weight.
Claim 11
Dependent Claim
33 words
The composite as defined in claim 5, said fibrous reinforcement-carbon-resin composite comprising about 35 to about 50% fibers, about 25 to about 40% resin and about 25 to about 40% carbon, by weight.
References Cited (Backward Citations)
US3203849A
Cited
US3462340A
Cited
US3462289A
Cited
US3466219A
Cited
US3778336A
Cited
US3573123A
Cited
US3772115A
Cited
US3649435A
Cited
US3700535A
Cited
US3826707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |