Patent US4353853A successfully refreshed from Google Patents.
US4353853A
Expired / Lapsed
US
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Method for making reticulated foam structures
Assignee: Xerox Corp
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Filing: 1980-07-23
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Granted: 1982-10-12
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Expires: 2000-07-23
Abstract
Abstract A method for making reticulated foam structure of a crosslinkable thermosetting polymer which includes the steps of dissolving the polymer in a relatively volatile solvent, forming the resultant solution into an emulsion with a relatively less volatile emulsifying vehicle, forming the emulsion into the desired structure, removing the solvent from the structure, removing the vehicle and curing the structure to form a reticulated foam structure.
Inventors
- 👤 Joseph A. Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S264/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A process for making reticulated foam structure of a cross-linkable thermosetting fluoroelastomer which comprises: the sequential steps of dissolving said fluoroelastomer in a solvent to form a solution, said solvent being evaporatable at or about ambient temperature; adding an emulsifying vehicle and a surface active agent to said solution, said emulsifying vehicle having a normal volatility lower than that of said solvent, and forming the mixture into an emulsion; forming said emulsion into the desired structure; substantially removing said solvent from said emulsion structure at or about ambient temperature while said emulsifying vehicle is present; removing said vehicle from said structure; and curing the polymer structure to form a reticulated foam structure.
Claim 2
Dependent Claim
112 words
A process for making reticulated foam structure of a cross-linkable thermosetting fluoroelastomer which comprises: the sequential steps of dissolving said fluoroelastomer in a solvent to form a solution, said solvent being evaporatable at or about ambient temperature; adding an emulsifying vehicle and a surface active agent to said solution, said emulsifying vehicle having a normal volatility lower than that of said solvent, and forming the mixture into an emulsion; forming said emulsion into the desired structure; substantially removing said solvent from said emulsion structure at or about ambient temperature while said emulsifying vehicle is present; removing said vehicle from said structure; and curing the polymer structure to form a reticulated foam structure.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein said emulsifying vehicle is water.
Claim 4
Dependent Claim
24 words
A process according to claim 1 wherein said solvent is acetone or methyl ethyl ketone or a mixture of acetone and methyl ethyl ketone.
Claim 5
Dependent Claim
20 words
A process according to claim 2 wherein said fluoroelastomer is a copolymer or terpolymer of vinylidene fluoride and a fluoroalkylene.
Claim 6
Dependent Claim
32 words
A process according to claim 4 wherein said emulsifying vehicle is water; and wherein said solvent is methyl ethyl ketone and it is removed from said emulsion structure at about ambient temperature.
Claim 7
Dependent Claim
16 words
A process according to claim 5 wherein said solution further comprising a filler for said polymer.
Claim 8
Dependent Claim
16 words
A process according to claim 5 wherein said reticulated foam structure is in a layer form.
Claim 9
Dependent Claim
26 words
A process according to claim 1 wherein the removal of said emulsifying vehicle is carried out concurrently with the initial and partial curing of the polymer.
Claim 10
Dependent Claim
14 words
A process according to claim 8 wherein said polymer is cured at elevated temperature.
References Cited (Backward Citations)
US3505435A
Cited
US3622527A
Cited
US3625871A
Cited
US3769381A
Cited
US3620895A
Cited
US3642668A
Cited
US3666542A
Cited
US3856914A
Cited
US3753932A
Cited
US3868337A
Cited
US4203848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |