US4446255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sized carbon fibers suitable for use in composites of improved impact resistance
Assignee: SUBJECT TO AGREEMENT RECITED SEE DOCUMENT FOR DETAILS
•
Filing: 1982-12-29
•
Granted: 1984-05-01
•
Expires: 2002-12-29
Abstract
Abstract Improved carbon fibers are provided which may be employed in composites to improve the impact resistance thereof. The carbon fibers disclosed are coated with a sizing composition comprised of a blend of an epoxy resin formed by the reaction of epichlorohydrin and p-amino phenol and an acrylonitrile butadiene-styrene (ABS) graft copolymer.
Inventors
- 👤 Lincoln Ying
- 👤 Thomas P. Carter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:04
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08L; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/30; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
A carbon fiber having a coating on the surface thereof in a concentration of approximately 0.5 to 3.0 percent by weight based on the weight of the carbon fiber of a sizing composition which comprises as a first component an epoxy resin comprising the reaction product of epichlorohydrin and p-amino phenol and a second component consisting of an acrylonitrile butadiene-styrene graft copolymer.
Claim 2
Dependent Claim
62 words
A carbon fiber having a coating on the surface thereof in a concentration of approximately 0.5 to 3.0 percent by weight based on the weight of the carbon fiber of a sizing composition which comprises as a first component an epoxy resin comprising the reaction product of epichlorohydrin and p-amino phenol and a second component consisting of an acrylonitrile butadiene-styrene graft copolymer.
Claim 3
Dependent Claim
22 words
The carbon fiber of claim 1 wherein said coating is present in a concentration of approximately 1.1 to 1.5 percent by weight.
Claim 4
Dependent Claim
23 words
The carbon fiber of claim 1 wherein said composition further comprises an additional epoxy resin formed by the reaction of epichlorohydrin and bisphenol.
Claim 5
Dependent Claim
28 words
The carbon fiber of claim 1 wherein said epoxy resin and said acrylonitrile butadiene-styrene graft copolymer are present in a weight ratio ranging from approximately 99:1 to 1:99.
Claim 6
Dependent Claim
28 words
The carbon fiber of claim 1 wherein said epoxy resin and said acrylonitrile butadiene-styrene graft copolymer are present in a weight ratio ranging from approximately 4:1 to 1:4.
Claim 7
Dependent Claim
69 words
A composite structure comprising a rigid polymeric matrix having carbon fibers incorporated therein which are coated on the surface thereof with approximately 0.5 to 3.0 percent by weight based on the weight of the carbon fibers of a sizing composition which comprises as a first component an epoxy resin comprising the reaction product of epichlorohydrin and p-amino phenol and a second component consisting of an acrylonitrile butadiene-styrene graft copolymer.
Claim 8
Dependent Claim
69 words
A composite structure comprising a rigid polymeric matrix having carbon fibers incorporated therein which are coated on the surface thereof with approximately 0.5 to 3.0 percent by weight based on the weight of the carbon fibers of a sizing composition which comprises as a first component an epoxy resin comprising the reaction product of epichlorohydrin and p-amino phenol and a second component consisting of an acrylonitrile butadiene-styrene graft copolymer.
Claim 9
Dependent Claim
22 words
The composite article of claim 6 wherein said coating is present in a concentration of approximately 1.1 to 1.5 percent by weight.
Claim 10
Dependent Claim
23 words
The composite article of claim 6 wherein said composition further comprises an additional epoxy resin formed by the reaction of epichlorohydrin and bisphenol.
Claim 11
Dependent Claim
28 words
The composite article of claim 6 wherein said epoxy resin and said acrylonitrile butadiene-styrene graft copolymer are present in a weight ratio ranging from approximately 99:1 to 1:99.
Claim 12
Dependent Claim
28 words
The composite article of claim 6 wherein said epoxy resin and said acrylonitrile butadiene-styrene graft copolymer are present in a weight ratio ranging from approximately 4:1 to 1:4.
Claim 13
Dependent Claim
18 words
The composite article of claim 6 comprising approximately 50 to 75 percent by weight of said carbon fibers.
Claim 14
Dependent Claim
18 words
The composite article of claim 6 comprising approximately 60 to 65 percent by weight of said carbon fibers.
References Cited (Backward Citations)
US3496250A
Cited
US3837904A
Cited
US3855174A
Cited
US3914504A
Cited
US3957716A
Cited
US3931354A
Cited
US4220686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |