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US3853600A Expired / Lapsed US ⏱️ 0.0 years remaining

Improved carbon fiber reinforced composite article

Assignee: Celanese Corp
•
Filing: 1973-02-28
•
Granted: 1974-12-10
•
Expires: 1993-02-28
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Abstract

Abstract A process is provided for modifying the surface characteristics of a carbonaceous fibrous material (i.e., either amorphous carbon or graphitic carbon) and to thereby facilitate enhanced adhesion between the carbonaceous fibrous material and a matrix material. The carbonaceous fibrous material is coated with a compact polyphenylene polymer coating which is deposited thereon upon contact with an excited gas species generated by applying high frequency electrical energy in pulsed form to an inert gas in the presence of at least one aromatic compound. The coating step is efficiently conducted at a temperature of about 0* to 150*C. and at a pressure within the coating zone of about 1 to 3 atmospheres. Composite articles of enhanced interlaminar shear strength may be formed by incorporating the fibers modified in accordance with the present process in a resinous matrix material.

Inventors

  • 👤 K Hou

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 10:59
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/36; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/298; Y10T428/31504; Y10T428/31511; Y10T428/31721; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/31909; Y10T428/31924; Y10T428/31928

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 42 words
A COMPOSITE ARTICLE EXHIBITING ENHANCED INTERLAMINAR SHEAR STRENGTH COMPRISING A RESINOUS MATRIX MATERIAL DERIVED FROM A THERMOSETTING RESIN HAVING INCORPORATED THEREIN A CARBONACEOUS FIBROUS MATERIAL CONTAINING AT LEAST 90 PER CENT CARBON BY WEIGHT WHICH BEARS UPON THE SURFACE OF SAID CARBO-
Claim 2
Dependent Claim 42 words
A COMPOSITE ARTICLE EXHIBITING ENHANCED INTERLAMINAR SHEAR STRENGTH COMPRISING A RESINOUS MATRIX MATERIAL DERIVED FROM A THERMOSETTING RESIN HAVING INCORPORATED THEREIN A CARBONACEOUS FIBROUS MATERIAL CONTAINING AT LEAST 90 PER CENT CARBON BY WEIGHT WHICH BEARS UPON THE SURFACE OF SAID CARBO-
Claim 3
Dependent Claim 42 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said resinous matrix material is derived from a polar thermosetting resin selected from the group consisting essentially of an epoxy, a polyimide, a polyester, and a phenolic resin.
Claim 4
Dependent Claim 27 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said carbonaceous fibrous material contains at least 95 per cent carbon by weight.
Claim 5
Dependent Claim 21 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said carbonaceous fibrous material includes graphitic carbon.
Claim 6
Dependent Claim 25 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from benzene.
Claim 7
Dependent Claim 25 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from toluene.
Claim 8
Dependent Claim 25 words
A composed article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from styrene.
Claim 9
Dependent Claim 24 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of polyphenylene polymer is derived from aniline.
Claim 10
Dependent Claim 30 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of polyphenylene polymer has a thickness of about 50 to 250 angstrom units.

References Cited (Backward Citations)

US3238054A Cited
US3002850A Cited
US3108018A Cited
US3429739A Cited
US3421930A Cited
US3462289A Cited
US3577508A Cited
US3533825A Cited
US3600216A Cited
US3692577A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-09 1978-06-10 1978-12-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-09 1982-06-10 1982-12-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-09 1986-06-10 1986-12-10 $7700.00 Window Closed / Lapsed

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