Patent US4983697A successfully refreshed from Google Patents.
US4983697A
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Preparation of cyano-containing perfluoropolymers having iodine curesites
Assignee: EIDP Inc
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Filing: 1989-05-19
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Granted: 1991-01-08
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Expires: 2009-05-19
Abstract
Abstract In the preparation of perfluoropolymers by the interpolymerization of tetrofluoroethylene, perfluro (alkyl vinyl) ether and cyano-cure site monomer, the improvement of incorporating iodo moieties by the reaction of iodo-compounds of the formula RIn, in which R is a hydrocarbon or halocarbon radical of 1 to 8 carbon atoms and n is 1 or 2.
Inventors
- 👤 Anestis L. Logothetis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:25
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/262; C08F216/00; C08F216/12; C08F216/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
In a process for the preparation of perfluoropolymer by the random copolymerization of tetrafluoroethylene, perfluoro (alkyl vinyl) ether and fluorinated curesite monomer containing nitrile groups, the improvement wherein the copolymerization reactants further comprise iodo-compounds of the formula RI n , in which R is a hydrocarbon or halocarbon radical of 1 to 8 carbon atoms and n is 1 or 2.
Claim 2
Dependent Claim
61 words
In a process for the preparation of perfluoropolymer by the random copolymerization of tetrafluoroethylene, perfluoro (alkyl vinyl) ether and fluorinated curesite monomer containing nitrile groups, the improvement wherein the copolymerization reactants further comprise iodo-compounds of the formula RI n , in which R is a hydrocarbon or halocarbon radical of 1 to 8 carbon atoms and n is 1 or 2.
Claim 3
Dependent Claim
16 words
A process of Claim 1 wherein the R group in the iodo-compound is a hydrocarbon radical.
Claim 4
Dependent Claim
16 words
A process of Claim 1 wherein the R group in the iodo-reactant is a halocarbon radical.
Claim 5
Dependent Claim
12 words
A process of Claim 1 wherein the iodo-compound is a di-iodo compound.
Claim 6
Dependent Claim
12 words
A process of Claim 4 wherein the iodo-compound consists essentially of diiodoperfluorobutane.
Claim 7
Dependent Claim
12 words
A process of Claim 4 wherein the iodo-compound consists essentially of diiodoperfluorohexane.
Claim 8
Dependent Claim
13 words
A process of Claim 2 wherein the iodo-compound consists essentially of methylene iodide.
Claim 9
Dependent Claim
18 words
A process of Claim 1 wherein the perfluoro (alkyl vinyl) ether consists essentially of perfluoro (methyl vinyl) ether.
Claim 10
Dependent Claim
18 words
A process of Claim 1 wherein the perfluoro (alkyl vinyl) ether is a perfluoro (alkoxy alkyl vinyl) ether.
Claim 11
Dependent Claim
17 words
A process of Claim 9 wherein the perfluoro (alkoxy alkyl vinyl) ether consists essentially of perfluoro (5-methyl-3,6-dioxa-1-nonene).
Claim 12
Dependent Claim
29 words
A process of Claim 1 wherein the nitrile curesites comprise at least about 0.1% by weight of the perfluoropolymer, and are randomly distributed along the backbone of the perfluoropolymer.
Claim 13
Dependent Claim
17 words
A process of Claim 1 wherein the interpolymerization is carried out in a continuous stirred tank reactor.
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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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |