US4826731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual cured fluoropolymer laminates
Assignee: EIDP Inc
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Filing: 1987-05-15
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Granted: 1989-05-02
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Expires: 2007-05-15
Abstract
Abstract Fluoroelastomer laminates having one layer of perfluoroelastomer with an ethylenically unsaturated hydrogen or perfluorophenyl and bromo- or iodo- cure site components and compounded with a K 2 AF curing system and a second layer of peroxide-curable polymer compounded with a peroxide curing agent. The laminates exhibit excellent high temperature adhesion and oxidative and fluid resistance.
Inventors
- 👤 Martin G. Wagner
- 👤 Anestis L. Logothetis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/06; B32B25/042; B32B25/20; C; C08; C08J; C08J3/00; C08J3/24; C08J3/243; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/138; B32B2305/00; B32B2305/72; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A laminate comprising (a) a first layer of a terpolymer of tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether wherein the alkyl group contains 1 to 5 carbon atoms, and up to about 2 mole percent of units derived from ethylenically unsaturated compounds having (i) hydrogen or perfluorophenyl and (ii) bromo- or iodisubstituents, the units being present in an amount sufficient to provide at least about 0.1 mole percent each of hydrogen or perfluorophenyl and bromine or iodine in the resulting terpolymer, the terpolymer having been compounded with an effective amount of K 2 AF curing agent and substantially free from peroxide curing agent, and (b) a second layer of a polymer selected from at least one peroxide curable elastomer compounded with an effective amount of peroxide curing agent.
Claim 2
Dependent Claim
126 words
A laminate comprising (a) a first layer of a terpolymer of tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether wherein the alkyl group contains 1 to 5 carbon atoms, and up to about 2 mole percent of units derived from ethylenically unsaturated compounds having (i) hydrogen or perfluorophenyl and (ii) bromo- or iodisubstituents, the units being present in an amount sufficient to provide at least about 0.1 mole percent each of hydrogen or perfluorophenyl and bromine or iodine in the resulting terpolymer, the terpolymer having been compounded with an effective amount of K 2 AF curing agent and substantially free from peroxide curing agent, and (b) a second layer of a polymer selected from at least one peroxide curable elastomer compounded with an effective amount of peroxide curing agent.
Claim 3
Dependent Claim
11 words
A laminate of claim 1 wherein the layers have been co-cured.
Claim 4
Dependent Claim
17 words
A laminate of claim 1 wherein the first layer is precured before lamination to the second layer.
Claim 5
Dependent Claim
22 words
A laminate of claim 1 wherein the terpolymer of the first layer is prepared from tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether and 4-bromo-3,3,4,4-tetrafluorobutene-1.
Claim 6
Dependent Claim
13 words
A laminate of claim 1 wherein the second layer is a silicone elastomer.
Claim 7
Dependent Claim
15 words
A laminate of claim 1 wherein the second layer is bonded to a metal substrate.
Claim 8
Dependent Claim
15 words
A laminate of claim 1 wherein the second layer is bonded to a cured elastomer.
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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |