Patent US4164601A successfully refreshed from Google Patents.
US4164601A
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Coating for fibrous carbon material in boron containing composites
Assignee: BP Chemicals Hitco Inc
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Filing: 1978-04-24
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Granted: 1979-08-14
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Expires: 1998-04-24
Abstract
Abstract Fibrous carbon material such as graphite cloth which is to be combined with a thermosetting resin and a boron containing compound to form a carbon-carbon composite is provided with a protective coating consisting of cured furfuryl alcohol copolymers. When formed into a laminate and heated to at least 2150° C. to carbonize and at least partially graphitize the thermosetting resin, the boron greatly increases the interlaminar tensile strength while the coating protects the fibrous material from adverse effects of the boron which reduce the tensile strength in the directions of the fibers of the fibrous carbon material of the composite.
Inventors
- 👤 Robert C. Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:19
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C08; C08J; C08J5/00; C08J5/24; C08J5/248; C08J5/249; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2933; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528; Y10T442/3569; Y10T442/3707; Y10T442/378; Y10T442/3813; Y10T442/60; Y10T442/659; Y10T442/67
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A carbon-carbon composite comprising a plurality of layers of fibrous material, the fibrous material being comprised of fibers of substantially carbon or graphite composition, and a resin binder of substantially carbon composition, the composite having an interlaminar tensile strength of not substantially less than 727 psi and a tensile strength in the directions of the fibers of not substantially less than 6800 psi.
Claim 2
Dependent Claim
63 words
A carbon-carbon composite comprising a plurality of layers of fibrous material, the fibrous material being comprised of fibers of substantially carbon or graphite composition, and a resin binder of substantially carbon composition, the composite having an interlaminar tensile strength of not substantially less than 727 psi and a tensile strength in the directions of the fibers of not substantially less than 6800 psi.
Claim 3
Dependent Claim
18 words
The invention set forth in claim 1, wherein the interlaminar tensile strength is at least about 1191 psi.
Claim 4
Dependent Claim
23 words
The invention set forth in claim 1, wherein the tensile strength in the directions of the fibers is at least about 10,035 psi.
Claim 5
Dependent Claim
34 words
The invention set forth in claim 1, wherein the interlaminar tensile strength is at least about 2300 psi and the tensile strength in the directions of the fibers is at least about 10,000 psi.
Claim 6
Dependent Claim
46 words
The invention set forth in claim 1, wherein the resin binder includes a first portion surrounding the fibers and formed from a flexible thermosetting coating on the fibers and a remaining second portion formed from a mixture of a thermosetting resin and a boron containing compound.
Claim 7
Dependent Claim
21 words
The invention set forth in claim 5, wherein the first portion surrounding the fibers is formed from cured furfuryl alcohol copolymers.
References Cited (Backward Citations)
US3672936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |