Patent US4555446A successfully refreshed from Google Patents.
US4555446A
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Carbon fiber and process for preparing same
Assignee: Toray Industries Inc
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Filing: 1983-06-28
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Granted: 1985-11-26
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Expires: 2003-06-28
Abstract
Abstract Carbon fiber superior in processability and in physical properties as a composite is obtained by treating carbon fiber with an epoxy resin composition incorporating a polyalkylene ether glycol derivative represented by the following general formula (I) or (II): ##STR1## wherein R 1 is alkylene of C 1 to C 30 , R 2 is alkyl of C 1 to C 30 , R 3 and R 4 are each hydrogen or methyl, R 5 is glycidyl, X is ether linkage (--O--) or ester linkage ##STR2## m and n are integers of 1 to 20.
Inventors
- 👤 Atsushi Sumida
- 👤 Shizuo Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:56
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2964; Y10T428/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A carbon fiber superior in high-order processability and in physical properties as a composite, said carbon fiber having been treated with an epoxy resin composition, said epoxy resin composition comprising an epoxy resin and at least one polyalkylene ether glycol derivative selected from the group consisting of a polyoxyethylenized 1,6-hexanediol glycidyl ether, a polyoxyethylene styrenized cumyl phenol, an alkylene bis-(ε-glycidyl polyalkylene oxide ether), a polyoxyethylene lauryl glycidyl ether and an alkyl (ε-glycidyl polyalkylene oxide ether).
Claim 2
Dependent Claim
75 words
A carbon fiber superior in high-order processability and in physical properties as a composite, said carbon fiber having been treated with an epoxy resin composition, said epoxy resin composition comprising an epoxy resin and at least one polyalkylene ether glycol derivative selected from the group consisting of a polyoxyethylenized 1,6-hexanediol glycidyl ether, a polyoxyethylene styrenized cumyl phenol, an alkylene bis-(ε-glycidyl polyalkylene oxide ether), a polyoxyethylene lauryl glycidyl ether and an alkyl (ε-glycidyl polyalkylene oxide ether).
Claim 3
Dependent Claim
69 words
The carbon fiber of claim 1, wherein said epoxy resin composition has a viscosity in the range of A 1 to Z 5 measured by a Gardner-Holdt viscometer as a 40 weight percent solution thereof in diethylene glycol monobutyl ether solution at 25° C., said epoxy resin composition comprising a mixture of 40-99 weight percent of said epoxy resin and 1-60 weight percent of said polyalkylene ether glycol derivative.
Claim 4
Dependent Claim
70 words
The carbon fiber of claim 1 or claim 2, wherein said epoxy resin composition has a viscosity in the range of A 1 to Z 5 measured by a Gardner-Holdt viscometer as a 40 weight percent solution thereof in diethylene glycol monobutyl ether at 25° C., said epoxy resin composition comprising a mixture of 60-97 weight percent of said epoxy resin and 3 to 40 weight percent of said derivative.
Claim 5
Dependent Claim
44 words
The carbon fiber of any one of claims 1 or 2 or 3, wherein the amount of said epoxy resin composition adhered to the carbon fiber is in the range of 0.1 to 10 weight percent based on the weight of the carbon fiber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |