US4517245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-ionic epoxy resin emulsion finishes for carbon fibers
Assignee: Cytec Technology Corp
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Filing: 1984-01-26
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Granted: 1985-05-14
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Expires: 2004-01-26
Abstract
Abstract A composition is disclosed for treating carbon fibers to provide an epoxy finish thereon, comprising an epoxy resin and an effective amount of a non-ionic emulsifier in the form of a block polymer consisting of a poly(oxypropylene) chain having poly(oxyethylene) groups at both ends of said chain, said polymer terminating in a primary hydroxyl group, said polymer having a molecular weight ranging from about 1100 to about 14,000. The process for treating the carbon fibers comprises applying the aqueous resin emulsion to the fibers and thereafter drying the fibers.
Inventors
- 👤 Raymond G. Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:03
CPC Classifications
C; C08; C08L; C08L63/00; C08J; C08J3/00; C08J3/02; C08J3/03; D; D01; D01F; D01F11/00; D01F11/10; D01F11/14; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/55; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
In a method of treating carbon fibers to provide an epoxy resin finish thereon in which the aqueous emulsion of an epoxy resin is applied to said fibers and said fibers are thereafter dried, the improvement which comprises using an effective amount of a non-ionic emulsifier in said epoxy resin emulsion, said emulsifier being a block polymer consisting of a poly(oxypropylene) chain having poly(oxyethylene) groups at both ends of said chain, said polymer terminating in a primary hydroxyl group, said polymer having a molecular weight ranging from about 1100 to about 14,000.
Claim 2
Dependent Claim
92 words
In a method of treating carbon fibers to provide an epoxy resin finish thereon in which the aqueous emulsion of an epoxy resin is applied to said fibers and said fibers are thereafter dried, the improvement which comprises using an effective amount of a non-ionic emulsifier in said epoxy resin emulsion, said emulsifier being a block polymer consisting of a poly(oxypropylene) chain having poly(oxyethylene) groups at both ends of said chain, said polymer terminating in a primary hydroxyl group, said polymer having a molecular weight ranging from about 1100 to about 14,000.
Claim 3
Dependent Claim
17 words
The invention set forth in claim 1, wherein said polymer has a molecular weight of about 9,000.
Claim 4
Dependent Claim
34 words
The invention set forth in claim 1, wherein said emulsifier is present in an amount of about 3% to about 8% by weight, based on the combined weight of epoxy resin and said emulsifier.
Claim 5
Dependent Claim
31 words
The invention set forth in claim 1, wherein said emulsifier is employed in an amount of about 5% by weight, based on the combined weight of epoxy resin and said emulsifier.
Claim 6
Dependent Claim
17 words
The invention set forth in claim 1, further including a minor proportion of a compatible organic solvent.
Claim 7
Dependent Claim
41 words
The invention set forth in claim 1, wherein said aqueous emulsion has a solids content of from about 0.3 to 2.5% by weight, and wherein the maximum particle size of the solids in said emulsion is about 3 microns in diameter.
Claim 8
Dependent Claim
71 words
The invention set forth in claim 1, wherein said emulsifier is present in an amount of about 5% by weight, based on the combined weight of epoxy resin and said emulsifier, said aqueous emulsion including a minor proportion of xylene, said aqueous emulsion having a solids content of about 0.3 to 2.5% by weight, ahd the maximum particle size of the solids in said emulsion is about 3 microns in diameter.
Claim 9
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 1.
Claim 10
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 2.
Claim 11
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 3.
Claim 12
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 4.
Claim 13
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 5.
Claim 14
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 6.
Claim 15
Dependent Claim
17 words
Carbon fibers having a uniform coating of epoxy resin thereon obtained by the process of claim 7.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |