Patent US4348310A successfully refreshed from Google Patents.
US4348310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of sulfonyl fluoride compounds and fluoropolymers
Assignee: EIDP Inc
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Filing: 1980-08-08
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Granted: 1982-09-07
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Expires: 2000-08-08
Abstract
Abstract Solutions are disclosed with solvents having completely halogenated, saturated, hydrocarbon backbones and solubility parameters within a particular range. Preferred solvent have at least one ether linkage. An exemplary solvent is ##STR1## wherein X is F, Cl, Br, and I; n is 0, 1, and 2; m is 1, 2, and 3; and Y is COOCH 3 and SO 2 F. The solutions include perfluorinated copolymers having high equivalent weight which have been prepared from tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomers.
Inventors
- 👤 Raimund H. Silva
- 👤 Paul R. Resnick
- 👤 Roger A. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:42
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/30; B01D71/32; B01D67/00; B01D67/0002; B01D67/0009; B01D67/0011; B01J; B01J31/00; B01J31/02; B01J31/06; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; B01J2231/00; B01J2231/40; B01J31/08; B01J31/10; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A solution of fluoropolymer in halogenated solvent wherein: the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is a perhalogenated, saturated liquid having at least one alkyl segment, at least one alkyl ether segment, and at least one terminal sulfonyl fluoride polar group wherein the halogens in the liquid are selected from the group consisting of F, Cl, Br and I, and the alkyls have one to three carbon atoms; and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomer having an equivalent weight of greater than 1000.
Claim 2
Dependent Claim
106 words
A solution of fluoropolymer in halogenated solvent wherein: the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is a perhalogenated, saturated liquid having at least one alkyl segment, at least one alkyl ether segment, and at least one terminal sulfonyl fluoride polar group wherein the halogens in the liquid are selected from the group consisting of F, Cl, Br and I, and the alkyls have one to three carbon atoms; and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomer having an equivalent weight of greater than 1000.
Claim 3
Dependent Claim
19 words
The solution of claim 1 wherein the fluoropolymer is present in an amount greater than 3 percent by weight.
Claim 4
Dependent Claim
30 words
The solution of claim 1 wherein the solvent is ##STR33## wherein X is F, Cl, Br, and I; n is 0, 1, and 2; m is 1, 2, and 3.
Claim 5
Dependent Claim
18 words
The solution of claim 3 wherein, in the solvent, X is Br, n is1, and m is 2.
Claim 6
Dependent Claim
19 words
The solution of claim 3 wherein, in the solvent, X is Cl, n is 1, and m is 2.
Claim 7
Dependent Claim
32 words
The solution of claim 3 wherein, in the solvent, X is F and Br, n is 0, and m is 2 represented by the structural formula: FSO.sub.2 CF.sub.2 CF.sub.2 OCF.sub.2 CF.sub.2 Br.
Claim 8
Dependent Claim
17 words
The solution of claim 3 wherein the copolymer is of perfluorinated ethylene and sulfonyl fluoride-containing vinyl monomer.
Claim 9
Dependent Claim
16 words
The solution of claim 3 wherein the copolymer is of perfluorinated ethylene and carboxyl-containing vinyl monomer.
Claim 10
Dependent Claim
13 words
The solution of claim 7 wherein the sulfonyl fluoride-containing vinyl monomer is ##STR34##
Claim 11
Dependent Claim
12 words
The solution of claim 8 wherein the carboxyl-containing vinyl monomer is ##STR35##
Claim 12
Dependent Claim
55 words
A solution of fluoropolymer in halogenated solvent wherein; the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is ##STR36## and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomer having an equivalent weight of greater than 1000.
Claim 13
Dependent Claim
55 words
A solution of fluoropolymer in halogenated solvent wherein; the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is ##STR36## and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride- or carboxyl-containing vinyl monomer having an equivalent weight of greater than 1000.
Claim 14
Dependent Claim
10 words
The solution of claim 1 wherein the solvent is ##STR37##
Claim 15
Dependent Claim
104 words
A solution of fluoropolymer in halogenated solvent wherein: the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is a perhalogenated, saturated liquid having at least one alkyl segment, at least one alkyl ether segment, and at least two terminal sulfonyl fluoride groups wherein the halogens in the liquid are selected from the group consisting of F, Cl, Br and I and the alkyls have one to three carbon atoms; and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride containing vinyl monomer having an equivalent weight of greater than 1000.
Claim 16
Dependent Claim
104 words
A solution of fluoropolymer in halogenated solvent wherein: the fluoropolymer is present in an amount greater than 0.5 percent, by weight, of the solution at 25° C.; the solvent is a perhalogenated, saturated liquid having at least one alkyl segment, at least one alkyl ether segment, and at least two terminal sulfonyl fluoride groups wherein the halogens in the liquid are selected from the group consisting of F, Cl, Br and I and the alkyls have one to three carbon atoms; and the fluoropolymer is a copolymer of tetrafluoroethylene and perfluorinated sulfonyl fluoride containing vinyl monomer having an equivalent weight of greater than 1000.
References Cited (Backward Citations)
US2828273A
Cited
US3170954A
Cited
US3250808A
Cited
US3282875A
Cited
US3781370A
Cited
GB1286859A
Cited
US3692569A
Cited
US3859330A
Cited
US3969285A
Cited
DE2510071A1
Cited
US4065366A
Cited
US4065366B1
Cited
US4038213A
Cited
US4188354A
Cited
JPS5342151A
Cited
JPS5342152A
Cited
US4116888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |