Patent US5427831A successfully refreshed from Google Patents.
US5427831A
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Fluoropolymer laminates
Assignee: EIDP Inc
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Filing: 1994-06-02
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Granted: 1995-06-27
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Expires: 2014-06-02
Abstract
Abstract Laminates of low swell elastomer, non-elastomeric fluoropolymer, and elastomer provide an excellent combination of flexibility and fuel permeation resistance.
Inventors
- 👤 Ronald D. Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:23
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B25/14; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2319/00; F16L2011/047; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/1386; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
88 words
A laminar structure comprising, and bonded together in the order specified, (a) a first layer, having a thickness of 0.1 to 1.5 m, comprising an elastomer which, when cured, has a volume swell no greater than 65%, as determined according to ASTM D 471, Reference Fuel C, 70 hours; (b) a second layer, having a thickness of 0.01 to 0.1 mm, comprising a non-elastomeric fluoropolymer which has been treated to promote adhesion; and (c) a third layer, having a thickness of 0.1 to 4.0 mm, comprising an elastomer.
Claim 2
Dependent Claim
88 words
A laminar structure comprising, and bonded together in the order specified, (a) a first layer, having a thickness of 0.1 to 1.5 m, comprising an elastomer which, when cured, has a volume swell no greater than 65%, as determined according to ASTM D 471, Reference Fuel C, 70 hours; (b) a second layer, having a thickness of 0.01 to 0.1 mm, comprising a non-elastomeric fluoropolymer which has been treated to promote adhesion; and (c) a third layer, having a thickness of 0.1 to 4.0 mm, comprising an elastomer.
Claim 3
Dependent Claim
43 words
The laminar structure of claim 1 wherein the elastomer of the first layer is selected from the group consisting of acrylonitrile butadiene rubbers having acrylonitrile contents greater than 25% by weight, copolymers of epichlorohydrin and ethylene oxide, hydrogenated acrylonitrile butadiene rubbers, and fluoroelastomers.
Claim 4
Dependent Claim
16 words
The laminar structure of claim 2 wherein the elastomer of the first layer is a fluoroelastomer.
Claim 5
Dependent Claim
19 words
The laminar structure of claim 3 wherein the fluoroelastomer is a copolymer prepared from tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene.
Claim 6
Dependent Claim
19 words
The laminar structure of claim 4 wherein the fluoroelastomer has a fluorine content of greater than 65% by weight.
Claim 7
Dependent Claim
22 words
The laminar structure of claim 1 wherein the nonelastomeric fluoropolymer is selected from the group consisting of tetrafluoroethylene homopolymers and tetrafluoroethylene copolymers.
Claim 8
Dependent Claim
17 words
The laminar structure of claim 6 wherein the non-elastomeric fluoropolymer is a copolymer of tetrafluoroethylene and hexafluoropropylene.
Claim 9
Dependent Claim
17 words
The laminar structure of claim 1 wherein the elastomer of the third layer is a non-fluorinated elastomer.
Claim 10
Dependent Claim
29 words
The laminar structure of claim 8 wherein the elastomer of the third layer is selected, from the group consisting of chlorosulfonated polyethylene, acrylonitrile butadiene rubber, and epichlorohydrin-ethylene oxide copolymers.
Claim 11
Dependent Claim
18 words
The laminar structure of claim 1 wherein the first layer has a thickness of less than 1.0 mm.
Claim 12
Dependent Claim
16 words
The laminar structure of claim 1 wherein the third layer has a thickness of 1.0-2.5 mm.
Claim 13
Dependent Claim
14 words
The laminar structure of claim 1 wherein the structure further comprises a reinforcing braiding.
Claim 14
Dependent Claim
16 words
The laminar structure of claim 12 wherein the reinforcing braiding is between layers (b) and (c).
Claim 15
Dependent Claim
30 words
The laminar structure of claim 12 wherein the reinforcing braiding is exterior to the third layer and the laminar structure comprises an additional elastomer layer adjacent to the reinforcing braiding.
Claim 16
Dependent Claim
20 words
The laminar structure of claim 12 wherein the reinforcing braiding is selected from at least one of polyester and polyammid.
Claim 17
Dependent Claim
26 words
The laminar structure of claim 1 wherein the structure is in the form of a tube or hose and the third layer is the exterior layer.
Claim 18
Dependent Claim
18 words
The laminar structure of claim 1 wherein the elastomers of the first and third layers are fluorinated elastomers.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |