US4216262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of carbon fibers
Assignee: Akzo NV
•
Filing: 1979-05-23
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Granted: 1980-08-05
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Expires: 1999-05-23
Abstract
Abstract The compound 4,4,4-trichloro-1,2-epoxy butane is utilized as a coupling agent for carbon fibers and resin matrix material in the production of carbon fiber reinforced composites to enhance the bonding characteristics of the fiber and resin while improving the flexural strength of the final composite structure.
Inventors
- 👤 John C. Goan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:22
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
A method for improving the bonding characteristics of carbon fibers with a resin matrix material which comprises applying to the surface of said fibers an effective amount of a coating composition consisting essentially of 4,4,4-trichloro-1,2-epoxy butane.
Claim 2
Independent Claim
36 words
A method for improving the bonding characteristics of carbon fibers with a resin matrix material which comprises applying to the surface of said fibers an effective amount of a coating composition consisting essentially of 4,4,4-trichloro-1,2-epoxy butane.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein the coating is applied in an amount in the range of about 0.1 wt.% to about 3.0 wt.%, based on the weight of the uncoated fibers.
Claim 4
Independent Claim
14 words
The method of claims 1 or 2 wherein the resin matrix is epoxy resin.
Claim 5
Independent Claim
46 words
A method for improving the bonding characteristics of carbon fibers with an epoxy resin which comprises applying to the surface of said fibers a coating composition consisting essentially of 4,4,4-trichloro-1,2-epoxy butane in an amount of about 1.0 wt.%, based on the weight of the uncoated fibers.
Claim 6
Independent Claim
46 words
A method for improving the bonding characteristics of carbon fibers with an epoxy resin which comprises applying to the surface of said fibers a coating composition consisting essentially of 4,4,4-trichloro-1,2-epoxy butane in an amount of about 1.0 wt.%, based on the weight of the uncoated fibers.
References Cited (Backward Citations)
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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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |