US4431786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel fluorodioxoles and fluorodioxole polymers
Assignee: EIDP Inc
•
Filing: 1982-05-06
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Granted: 1984-02-14
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Expires: 2002-05-06
Abstract
Abstract Novel fluorodioxoles which may have Cl or F substituents in the 4 or 5 positions and have two F or CF 3 substituents in the 2 position are useful monomers for the preparation of homopolymers and copolymers with tetrafluoroethylene and terpolymers with tetrafluoroethylene and vinylidene fluoride. The homopolymers are suitable for glazing materials, while copolymers are useful, among others, for corrosion-resistant seals, gaskets, and linings.
Inventors
- 👤 Edward N. Squire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:22
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C08; C08F; C08F34/00; C08F34/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A polymer of a fluorodioxole having the formula ##STR6## wherein Y is hydrogen or chlorine; Z is hydrogen, fluorine, or chlorine, or R is fluorine or the trifluoromethyl group; said polymer being a homopolymer, a copolymer with tetrafluoroethylene, or a terpolymer with tetrafluoroethylene and vinylidene fluoride; with the proviso that when at least one of Y and Z is chlorine, the polymer is not a homopolymer.
Claim 2
Dependent Claim
66 words
A polymer of a fluorodioxole having the formula ##STR6## wherein Y is hydrogen or chlorine; Z is hydrogen, fluorine, or chlorine, or R is fluorine or the trifluoromethyl group; said polymer being a homopolymer, a copolymer with tetrafluoroethylene, or a terpolymer with tetrafluoroethylene and vinylidene fluoride; with the proviso that when at least one of Y and Z is chlorine, the polymer is not a homopolymer.
Claim 3
Dependent Claim
11 words
A crystalline copolymer of a fluorodioxole of claim 1 with tetrafluoroethylene.
Claim 4
Dependent Claim
18 words
A copolymer of claim 2 wherein Y is hydrogen; Z is hydrogen or fluorine: and R is trifluoromethyl.
Claim 5
Dependent Claim
21 words
An amorphous copolymer of a fluorodioxole of claim 1 with tetrafluoroethylene, wherein only one of Y and Z can be chlorine.
Claim 6
Dependent Claim
17 words
A copolymer of claim 4 wherein each of Y and Z is hydrogen, and R is trifluoromethyl.
Claim 7
Dependent Claim
16 words
A copolymer of claim 4 wherein each of Y and Z hydrogen and R is fluorine.
Claim 8
Dependent Claim
13 words
A terpolymer of a fluorodioxole of claim 1 with vinylidene fluoride and tetrafluoroethylene.
Claim 9
Dependent Claim
20 words
An amorphous homopolymer of a fluorodioxole of claim 1 in which Y is hydrogen and Z is hydrogen or fluorine.
Claim 10
Dependent Claim
12 words
A self-supporting film of a polymer of any one of claims 1-8.
References Cited (Backward Citations)
US3308107A
Cited
US3978030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |