Patent US4434116A successfully refreshed from Google Patents.
US4434116A
Expired / Lapsed
US
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Method for making a porous fluorinated polymer structure
Assignee: Diamond Shamrock Chemicals Co
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Filing: 1981-06-26
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Granted: 1984-02-28
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Expires: 2001-06-26
Abstract
Abstract A method is shown for making porous thermoresin structures. By the method, the thermoresin is at least partially solvated, formed into a desired shape, and cooled until droplets of the solvent form by syneresis within the shape. Further cooling crystalizes the droplets. These crystalized droplets are subsequently removed to leave a porous structure.
Inventors
- 👤 Michael J. Covitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:54
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/30; B01D71/32; B01D67/00; B01D67/0002; B01D67/0023; B01D67/003; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C08J9/00; C08J9/26; C25; C25B; C25B13/00; C25B13/04; C25B13/08; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/426; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; C25B9/00; C25B9/17; C25B9/19; C25B9/23; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
108 words
A method for forming a porous, resinous structure comprising the steps of: blending a fluorinated polymer or fluorinated copolymer and a dispersion media; heating the blend to a temperature between the melting point of the dispersion media and the boiling point of the dispersion media; maintaining the temperature until said fluorinated polymer or fluorinated copolymer at least partially dissolves in said dispersion media thereby forming a dispersion; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within dispersion; and continuing cooling causing crystallization of substantially all of said droplets; and removing the droplets to leave pores within the structure.
Claim 2
Independent Claim
108 words
A method for forming a porous, resinous structure comprising the steps of: blending a fluorinated polymer or fluorinated copolymer and a dispersion media; heating the blend to a temperature between the melting point of the dispersion media and the boiling point of the dispersion media; maintaining the temperature until said fluorinated polymer or fluorinated copolymer at least partially dissolves in said dispersion media thereby forming a dispersion; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within dispersion; and continuing cooling causing crystallization of substantially all of said droplets; and removing the droplets to leave pores within the structure.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the droplets are removed by dissolution in a solvent and at a temperature whereby the fluorinated polymer or fluorinated copolymer is substantially insoluble.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein the droplets are removed utilizing at least one of heat and vacuum.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the blend is cooled to form a gelatinous dispersion prior to forming the desired structure.
Claim 6
Independent Claim
108 words
A method for forming a porous resinous structure from a perfluorinated polymer comprising the steps of: blending the perfluorinated polymer and a dispersion media; heating the blend to a temperature between the melting point of the dispersion media and the boiling point of the dispersion media; maintaining of the temperature until the perfluorinated polymer at least partially dissolves in the dispersion media thereby forming a dispersion; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within the dispersion; and continuing cooling causing cyrstallization of substantially all of said droplets; and removing the droplets to leave pores within the structure.
Claim 7
Independent Claim
108 words
A method for forming a porous resinous structure from a perfluorinated polymer comprising the steps of: blending the perfluorinated polymer and a dispersion media; heating the blend to a temperature between the melting point of the dispersion media and the boiling point of the dispersion media; maintaining of the temperature until the perfluorinated polymer at least partially dissolves in the dispersion media thereby forming a dispersion; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within the dispersion; and continuing cooling causing cyrstallization of substantially all of said droplets; and removing the droplets to leave pores within the structure.
Claim 8
Dependent Claim
25 words
The method of claim 5 wherein the droplets are removed by dissolution in a solvent and at a temperature whereby the resin is substantially insoluble.
Claim 9
Dependent Claim
18 words
The method of claim 5 wherein the droplets are removed utilizing at least one of heat and vacuum.
Claim 10
Dependent Claim
23 words
The method of claim 5 including the step of cooling the blend to form a gelatinous dispersion prior to forming the desired shape.
Claim 11
Independent Claim
106 words
A method for making a porous copolymeric perfluorocarbon structure comprising the steps of: blending a copolymeric perfluorocarbon and a dispersion media; heating the blend to a temperature between the melt point of the dispersion media and the boiling point of the dispersion media; maintaining the temperature until the copolymeric perfluorocarbon at least partially dissolves in the dispersion media thereby forming a dispersion media; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within the dispersion; and continuing cooling causing crystallization of substantially all of the said droplets; and removing the droplets to leave pores within the structure.
Claim 12
Independent Claim
106 words
A method for making a porous copolymeric perfluorocarbon structure comprising the steps of: blending a copolymeric perfluorocarbon and a dispersion media; heating the blend to a temperature between the melt point of the dispersion media and the boiling point of the dispersion media; maintaining the temperature until the copolymeric perfluorocarbon at least partially dissolves in the dispersion media thereby forming a dispersion media; forming a desired structure from the blend; cooling the blend to cause syneresis of droplets of dispersion media within the dispersion; and continuing cooling causing crystallization of substantially all of the said droplets; and removing the droplets to leave pores within the structure.
Claim 13
Dependent Claim
108 words
The method of claim 9 wherein the copolymeric perfluorocarbon is polymerized from at least two monomers, one of said monomers consisting essentially of at least one fluorinated vinyl compound, and the other of said monomers consisting essentially of at least one monomer of the structures CF 2 ═CFX, CF 2 CFR 1 X and CF 2 ═CFOR 1 X wherein R 1 is a bifunctional perfluorinated radical of from 2 to 8 carbon atoms can be at least once interrupted by an oxygen atom, and X is selected from a group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester and carboxylate ester, amides thereof and saponification products thereof.
Claim 14
Dependent Claim
19 words
The method of claim 9 wherein the dispersion media includes at least one of perfluorooctanoic acid and perfluorodecanoic acid.
Claim 15
Dependent Claim
25 words
The method of claim 11 wherein the droplets are removed by dissolution in a solvent and at a temperature whereby the resin is substantially insoluble.
Claim 16
Dependent Claim
33 words
The method of claim 12 wherein the solvent is one of acetone, 2-propyenl, and 1,1,2-trichloro-2,2,1-trifluoroethane used to dissolve the droplets at a temperature at or below a crystallizing point of the dispersion media.
Claim 17
Dependent Claim
18 words
The method of claim 9 wherein the droplets are removed utilizing at least one of heat and vacuum.
Claim 18
Dependent Claim
23 words
The method of claim 9 including the step of cooling the blend to form a gelatinous dispersion prior to forming the desired structure.
References Cited (Backward Citations)
US2393967A
Cited
US2559752A
Cited
US2593583A
Cited
US2792377A
Cited
US3041317A
Cited
US3297484A
Cited
US3624053A
Cited
US3282875A
Cited
US3560568A
Cited
US3718627A
Cited
US3642668A
Cited
US3770547A
Cited
US3784399A
Cited
US3925135A
Cited
US3798063A
Cited
US4025439A
Cited
US4151053A
Cited
US4039409A
Cited
US4057479A
Cited
US4056452A
Cited
US4188354A
Cited
US4116888A
Cited
US4147844A
Cited
US4119581A
Cited
US4267364A
Cited
US4203848A
Cited
GB2009792B
Cited
US4210501A
Cited
GB2009788B
Cited
GB2009795B
Cited
US4262041A
Cited
US4209368A
Cited
US4212714A
Cited
US4214958A
Cited
US4298697A
Cited
US4298699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |