US4353853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 04:02
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.
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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 |