US4868038A
Expired / Lapsed
US
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Carbonaceous fiber reinforced composites
Assignee: Dow Chemical Co
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Filing: 1987-10-23
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Granted: 1989-09-19
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Expires: 2007-10-23
Abstract
Abstract The present invention is concerned with a composite material matrix of a synthetic or natural resin with a reinforcement of a multiplicity of lightweight, resilient shaped reforming elongatable, non-linear, non-flammable carbonaceous fibers. The fibers preferably have a sinusoidal or coil-like shape, a reversible deflection ratio of greater than 1.2:1 and an aspect ratio (1/d) greater than 10:1. The fiber-reinforced composite material of the present invention possess excellent impact resistance properties.
Inventors
- 👤 Francis P. McCullough, Jr.
- 👤 Clarence R. Dick
- 👤 Steven L. Brewster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:25
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B9/00; B32B2262/00; B32B2262/10; B32B2262/106; B32B2307/00; B32B2307/20; B32B2307/202; C08K2201/00; C08K2201/016; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/40; Y10T442/425; Y10T442/60; Y10T442/608
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
49 words
A fiber reinforced composite material comprising a synthetic resin matrix containing a multiplicity of reinforcing carbonaceous fibers, said reinforcing fibers comprising resilient shaped reforming elongatable non-linear non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio (1/d) of greater than 10:1.
Claim 2
Dependent Claim
49 words
A fiber reinforced composite material comprising a synthetic resin matrix containing a multiplicity of reinforcing carbonaceous fibers, said reinforcing fibers comprising resilient shaped reforming elongatable non-linear non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio (1/d) of greater than 10:1.
Claim 3
Dependent Claim
13 words
The composite material of claim 1 wherein the fibers have a sinusoidal configuration.
Claim 4
Dependent Claim
13 words
The composite material of claim 1 wherein the fibers have a coil-like configuration.
Claim 5
Dependent Claim
13 words
The composite material of claim 1 wherein the resin is a thermosetting resin.
Claim 6
Dependent Claim
13 words
The composite material of claim 1 wherein the resin is a thermoplastic resin.
Claim 7
Dependent Claim
12 words
The composite material of claim 1 wherein the resin is a rubber.
Claim 8
Dependent Claim
17 words
The composite material of claim 1 wherein the composite material is in the form of a sheet.
Claim 9
Dependent Claim
23 words
The composite material of claim 7 wherein the thermoplastic matrix resin is a polycarbonate resin, a polyamide resin or thermoplastic saturated polyester resin.
Claim 10
Dependent Claim
23 words
The composite material of claim 1 wherein the composite material is in the form of a three-dimensional shaped article suitable for ultimate uses.
Claim 11
Dependent Claim
13 words
The composite material of claim 1 wherein the matrix resin is a polyethylene.
Claim 12
Dependent Claim
19 words
The composite material of claim 1 wherein said carbonaceous fibers are in the form of a yarn or tow.
Claim 13
Dependent Claim
19 words
The composite material of claim 1 wherein said carbonaceous fibers are in the form of a cloth or fabric.
Claim 14
Dependent Claim
14 words
The composite material of claim 1 wherein said carbonaceous fibers are continuous carbonaceous fibers.
Claim 15
Dependent Claim
18 words
The composite material of claim 1 wherein said carbonaceous fibers are in the form of a non-woven structure.
Claim 16
Dependent Claim
17 words
The composite material of claim 1 wherein the carbonaceous fibers are in the form of a batting.
Claim 17
Dependent Claim
21 words
The composite material of claim 15 wherein the batting has a bulk density of less than about 8 kg/m 3 .
Claim 18
Dependent Claim
19 words
A composite material of claim 1 wherein the carbonaceous fiber has a limited oxygen index value greater than 40.
Claim 19
Dependent Claim
13 words
The composite material of claim 1 wherein the fibers are non-electrically conductive fibers.
Claim 20
Dependent Claim
13 words
The composite material of claim 1 wherein the fibers possess no anti-static characteristics.
Claim 21
Dependent Claim
12 words
The composite material of claim 1 wherein the fibers are electrically conductive.
Claim 22
Dependent Claim
17 words
The composite material of claim 1 wherein the fibers have a carbon content of less than 85%.
Claim 23
Dependent Claim
17 words
The composite material of claim 1 wherein the fibers have a carbon content of at least 85%.
Claim 24
Dependent Claim
15 words
The composite material of claim 1 wherein the fibers are derived from stabilized acrylic fibers.
Claim 25
Dependent Claim
21 words
The composite material of claim 1 wherein the carbonaceous fibers have a percent nitrogen content of from about 10 to 35%.
Claim 26
Dependent Claim
19 words
The composite material of claim 1 wherein the carbonaceous fibers have a nitrogen content of about 16 to 19%.
Claim 27
Dependent Claim
21 words
The composite material of claim 1, wherein the fibers have a bulk density of less than about 32 kg/m 3 .
Claim 28
Dependent Claim
14 words
The composite material of claim 1 wherein the fibers are derived from stabilized polyacrylonitrile.
Claim 29
Dependent Claim
13 words
The composite material of claim 1 wherein the matrix resin is an epoxy.
References Cited (Backward Citations)
US4631118A
Cited
US4643932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |